287 results on '"faecal samples"'
Search Results
52. Comparison of the detection efficiency of haemoparasite DNA in blood and faecal samples – the way to eco-epidemiological studies.
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Bajer, Anna, Dwużnik, Dorota, Tołkacz, Katarzyna, Alsarraf, Mohammed, and Mierzejewska, Ewa Julia
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Introduction and objective. It is easier and non-invasive to obtain faecal samples compared with blood samples. Molecular techniques may enable detection of parasites even in tiny amounts of blood-containing faeces. We aimed to compare the sensitivity of detection of three Babesia species and Hepatozoon canis in blood and faecal samples, including samples derived from naturally infected hosts. Materials and method. Three groups were involved: 1) Nine BALB/c mice infected with Babesia microti sampled during acute (n=3), post-acute (n=3) and chronic phases of infection (n=3); 2) Eight dogs with symptoms of babesiosis; 3) Six red foxes infected with B. vulpes, one fox infected with B. canis, four foxes infected with H. canis. Genomic DNA was extracted from blood and faeces by use of commercial kits and amplified with genus-specific primers in one-step or nested PCR reactions. Selected PCR products were sequenced. Results. No positive results for faecal samples were obtained from H. canis-positive foxes in contrast to Babesia spp. infections. Positive results from PCRs were obtained for all BALB/c mice (100%), five dogs (62.5%) and four of seven foxes (57.1%). Successful sequencing was obtained for six selected murine samples (B. microti), four canine samples (B. canis) and for one fox sample (B. vulpes). The success of B. microti detection in murine faecal samples from acute, post-acute and chronic phases was identical (100%). Conclusions. Detectability of Babesia spp. infections was lower in naturally infected dogs and foxes, compared to experimentally infected mice. Detection of DNA in faecal samples can be useful in the detection of Babesia infection in populations from which blood samples are hard to obtain, but due regard must be given to the possibility that prevalence of infection may be severely underestimated. [ABSTRACT FROM AUTHOR]
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- 2019
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53. Isolating DNA sourced non-invasively from koala scats: a comparison of four commercial DNA stool kits.
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Wedrowicz, Faye, Mosse, Jennifer, Wright, Wendy, and Hogan, Fiona E.
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Genetic sampling from faeces is a useful method for obtaining DNA samples non-invasively. The quantity and quality of DNA isolated from faecal samples is, however, an important factor affecting the success of downstream analyses. Commercial DNA isolation kits offer an efficient and convenient means for recovering DNA, but the kit methodology can influence the quantity and quality of DNA obtained. Comparisons of kit performance for the isolation of DNA from non-invasive sources for ecological studies based on genetic analysis are uncommon in the literature. This study compared the quantity and quality of DNA isolated from surface washings of fresh koala (Phascolarctos cinereus) faecal pellets (scats) using four commercial DNA isolation kits: Axygen® AxyPrep™ MAG Soil, Stool, and Water DNA Kit (AX), Bioline ISOLATE Fecal DNA Kit (BL), Qiagen QIAamp® Fast DNA Stool Mini Kit (QFS), and Qiagen QIAamp® DNA Stool Mini Kit (QS). DNA quantitation, standard PCR and electrophoresis, real time PCR and replicate genotyping using capillary electrophoresis were used to compare the performance of resultant DNA isolates. The performance of DNA isolated from koala scats varied substantially with the DNA kit utilised. All kits provided accurate genotypes but with differing amounts of missing data. Overall, kit AX performed best, providing DNA isolates of higher quantity and quality compared to kit QS, which has previously been thoroughly assessed for genotyping reliability using DNA from koala scats. Given the high variability noted, assessing kit performance is an important way to maximise data quality from non-invasively sourced DNA. [ABSTRACT FROM AUTHOR]
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- 2019
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54. A roadmap for high‐throughput sequencing studies of wild animal populations using noninvasive samples and hybridization capture.
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White, Lauren C., Fontsere, Claudia, Lizano, Esther, Hughes, David A., Angedakin, Samuel, Arandjelovic, Mimi, Granjon, Anne‐Céline, Hans, Jörg B., Lester, Jack D., Rabanus‐Wallace, M. Timothy, Rowney, Carolyn, Städele, Veronika, Marques‐Bonet, Tomas, Langergraber, Kevin E., and Vigilant, Linda
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ANIMAL populations , *SPECIES hybridization , *NUCLEOTIDE sequencing , *CHIMPANZEES , *EXOMES - Abstract
Large‐scale genomic studies of wild animal populations are often limited by access to high‐quality DNA. Although noninvasive samples, such as faeces, can be readily collected, DNA from the sample producers is usually present in low quantities, fragmented, and contaminated by microorganism and dietary DNAs. Hybridization capture can help to overcome these impediments by increasing the proportion of subject DNA prior to high‐throughput sequencing. Here we evaluate a key design variable for hybridization capture, the number of rounds of capture, by testing whether one or two rounds are most appropriate, given varying sample quality (as measured by the ratios of subject to total DNA). We used a set of 1,780 quality‐assessed wild chimpanzee (Pan troglodytes schweinfurthii) faecal samples and chose 110 samples of varying quality for exome capture and sequencing. We used multiple regression to assess the effects of the ratio of subject to total DNA (sample quality), rounds of capture and sequencing effort on the number of unique exome reads sequenced. We not only show that one round of capture is preferable when the proportion of subject DNA in a sample is above ~2%–3%, but also explore various types of bias introduced by capture, and develop a model that predicts the sequencing effort necessary for a desired data yield from samples of a given quality. Thus, our results provide a useful guide and pave a methodological way forward for researchers wishing to plan similar hybridization capture studies. [ABSTRACT FROM AUTHOR]
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- 2019
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55. The effects of transport stress on the behaviour and adrenocortical activity of the black-and-white ruffed lemur (Varecia variegata).
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Volfová, Martina, Machovcová, Zuzana, Schwarzenberger, Franz, Voslářová, Eva, Bedáňová, Iveta, and Večerek, Vladimír
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DEFECATION , *BEHAVIOR , *PSYCHOLOGICAL stress - Abstract
The aim of this study was to assess behavioural and glucocorticoid changes in blackand- white ruffed lemur females transported for breeding purposes between Czech ZOOs. The frequency of the presented behaviour elements was recorded via direct observation. The faecal samples were collected from the floor and subsequently the faecal glucocorticoid values were determined using specifically designed assays for faecal glucocorticoid metabolite (FGM) analysis. While the frequency of certain comfort behaviour patterns decreased (P < 0.05) in response to transport and change of the environment, grooming, resting, sleeping as well as playful behaviour (chasing, climbing) were not affected (P < 0.05). No changes were found in the frequency of behaviour connected to metabolic events with the exception of defecation. Lemur females defecated more frequently (P < 0.05) in their new environment. The frequency of neither fear nor exploratory behaviour differed (P < 0.05) before and after transport. The positive effect of the novelty was shown by the reduction (P < 0.01) of behavioural signs of frustration and stereotypical behaviour after transport. In response to transport, a significant (P < 0.05) increase of FGM levels was found the second day after the transport, reaching peak levels in the morning and starting to decline to baseline levels in the afternoon. The results of both behaviour and adrenocortical activity analysis suggest that despite some presented changes in the monitored indices prior and after transport, the transportation under the studied conditions presented only a mild stressor with limited behavioural and glucocorticoid responses. [ABSTRACT FROM AUTHOR]
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- 2019
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56. Profile of intestinal parasites among nomadic Fulani in Kwara State, Nigeria.
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Babatunde, S. K., Kolawole, D. O., Majekodunmi, R. A., Ajiboye, A. E., Ojo, S., Ajao, A. T., and Ajuwon, B. I.
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INTESTINAL parasites , *ENTAMOEBA histolytica , *PARASITIC diseases , *DISEASE prevalence , *HELMINTHS - Abstract
Parasitic infections are endemic worldwide and have been described as constituting the greatest single cause of illness and disease especially in the tropics. Fulani herdsmen belong to a tribe that lives a secluded life style with little information on their intestinal parasitic infections status. This study aimed at assessing the burden of intestinal parasites and risk factors associated with intestinal parasites transmission among Fulani herdsmen in Kwara State. Stool samples were collected from patients that attended three primary healthcare facilities in Ifelodun Local Government Area and one hospital in Moro Local Government Area. The 505 stool samples were collected and examined by both wet mount preparation and formol-ether concentration methods. Questionnaire on bio- data and other information on factors associated with transmission of intestinal parasitic infections was administered on the patients. Prevalence of intestinal parasitic infections was 60.4% among the Fulani. High proportion of the patients had coccidian parasites such as Cryptosporidium, Cyclospora and Isospora, than other protozoan and helminthic parasites. Factors like unsafe water sources, improper disposal of human and animal wastes, drinking unpasteurized fresh milk and poor personal hygiene were considered contributing factors to the high prevalence of intestinal parasites among the nomad Fulani. The study provided a new insight into burden of intestinal parasites among Fulani herdsmen and factors associated with their transmission and spread. [ABSTRACT FROM AUTHOR]
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- 2019
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57. Shiga toxin-producing Escherichia coli in wild ungulates.
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Dias, D., Caetano, T., Torres, R.T., Fonseca, C., and Mendo, S.
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Abstract Shiga toxin-producing Escherichia coli (STEC) are zoonotic pathogens that live in the gastrointestinal tract of wildlife and cattle without causing disease. In humans, their colonization and infection lead to life-threatening disease. We investigated the occurrence of STEC in wild ungulates (wild boar, red deer and roe deer) inhabiting areas differently impacted by anthropogenic activities. STEC were detected in 9% (n = 6) of the samples and were recovered from the three species: 1 of wild boar, 4 of red deer and 1 of roe deer. All the isolates (n = 7) were non-O157 STEC encoding stx1 (n = 2; 29%) and/or stx2 genes (n = 6; 86%). O27:H30 was the most frequent serotype identified, followed by O146:H21 and O146:H28. Two STEC were O-untypable: ONT:H28 and ONT:H52. The phylo-groups identified were B1 (n = 3), E (n = 3) and F (n = 1). All the isolates recovered were susceptible to the different classes of antibiotics tested, although resistance genes were found in two strains. Apart from stx , all STEC encode many virulence factors (VF), particularly adhesins and/or other toxins. A strain with 13 VF collected from roe deer has a high enterohemorrhagic risk due to the presence of intimin, hemolysin and protease effectors genes. Enterohemorrhagic E. coli (EHEC) are implicated in the major cases of human infection and mortality, highlighting the zoonotic potential of wildlife-associated STEC. Wild ungulates are reservoirs of STEC potentially pathogenic to humans. Therefore, following the One Health concept, it is crucial to establish worldwide local monitoring programs that will benefit human, animal and environmental health. Graphical abstract Unlabelled Image Highlights • 9% of wild ungulates were non-O157 STEC carriers. • Serotypes O27:H30, O146:H21, O146:H28, ONT:H28 and ONT:H52 were identified. • stx2 genes (86%) were more frequent than stx1 (29%). • A highly virulent strain (containing 13 virulence factors) was isolated from roe deer. [ABSTRACT FROM AUTHOR]
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- 2019
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58. Noninvasive measurements of ovarian activity in Beira antelope (Dorcatragus megalotis).
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Wolf, Tanja E., Arif, Abdi, Bennett, Nigel C., and Ganswindt, André
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ANTELOPES , *ANIMAL reproduction , *PROGESTATIONAL hormones , *ESTROGEN , *ANIMAL breeding - Abstract
Contents: As the natural habitat of more and more species becomes depleted, captive breeding programmes have become established to bring species back from the brink of extinction. Monitoring the reproductive status of an individual is essential in order to improve breeding success. Traditional methods have involved stressful blood sampling, and thus noninvasive methods have been proven to be reliable alternatives for monitoring reproductive function in both captive and free‐ranging animals. Subsequently, noninvasive methods have become an invaluable tool in longitudinal studies and conservation efforts, as animals can be observed without, or minimal human contact. The Beira antelope is a small antelope endemic to the northern part of the Horn of Africa. Population numbers of the Beira have been declining over the last few decades due to habitat fragmentation. We show here that the reproductive cycle of female Beira antelopes can be monitored noninvasively, by using faecal samples to analyse oestrogen (fEM) as well as progestagen (fPM) metabolites. The profiles of fPM and fEM of both females showed regular cyclic patterns in which the follicular and luteal phases could be distinguished. The overall mean cycle length is 22 days (range: 21–25 days), with a mean length of the follicular phase of 6 days (range: 4–7 days) and a mean length for the luteal phase being 15 days (range: 12–16 days). The suitability of these noninvasive techniques should assist in optimizing breeding efforts of this endemic small antelope in captivity. Being noninvasive, this method could also be a useful tool for monitoring reproductive function in the dwindling wild populations. [ABSTRACT FROM AUTHOR]
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- 2019
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59. Simultaneous determination of dietary isoprenoids (carotenoids, chlorophylls and tocopherols) in human faeces by Rapid Resolution Liquid Chromatography.
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Stinco, Carla M., Benítez-González, Ana M., Meléndez-Martínez, Antonio J., Hernanz, Dolores, and Vicario, Isabel M.
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ISOPENTENOIDS , *LIQUID chromatography , *FECES examination , *CHLOROPHYLL , *LIQUID-liquid extraction - Abstract
Highlights • A RRLC-DAD method was set up and validated for 19 isoprenoids in a faecal matrix. • The method shows good analytical validation parameters in a run time of only 28 min. • 25 carotenoids isomers, 9 chlorophylls derivatives and 2 tocopherols are identified. • The method is suitable for isoprenoids bioaccessibility evaluation in human studies. Abstract An analytical method was validated for the quantitative determination of isoprenoids compounds in faecal samples, based on liquid-liquid extraction from a small aliquot (0.3-0.5 g of sample) and subsequent analysis by Rapid Resolution Liquid Chromatography (RRLC) on a C30 column. An excellent linear response was observed over the range specified for all dietary isoprenoids, as confirmed by the correlation coefficient, which ranged from 0.9977 to 0.9999. LODs ranged from 0.002 μg to 0.036 μg for lutein and α-tocopherol, respectively. Depending on the compound, LOQs ranged from 0.001 μg (lutein) to 0.120 μg (α-tocopherol). For accuracy testing, spiking of faeces samples with trans-β-apo-8′-carotenal, α-tocopherol and chlorophyll a were performed (three concentration levels). Excellent recoveries were obtained in all levels (>90%). The intra-day RSD% ranged from 0.86 to 9.78%. The inter-day RSD% was not higher than 10%, except to α-tocopherol (11.34%). In order to assess the applicability of the method faecal samples from a baby fed with different purees formulated from various vegetables were analysed during a six month period. α-carotene, β-carotene, capsanthin, lycopene, lutein, phytoene, phytofluene, violaxanthin, zeaxanthin and ζ-carotene), and their isomers were identified and quantified using this method. Besides, 2 tocopherols and 9 chlorophylls and derivatives were identified and quantified in the faecal samples analysed. This method is suitable to determine dietary isoprenoids from complex matrices such as human faeces within 28 min. [ABSTRACT FROM AUTHOR]
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- 2019
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60. Incomplete degradation of lichen usnic acid and atranorin in Svalbard reindeer (Rangifer tarandus platyrhynchus).
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Węgrzyn, Michał Hubert, Wietrzyk-Pełka, Paulina, Galanty, Agnieszka, Cykowska-Marzencka, Beata, and Sundset, Monica Alterskjær
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REINDEER ,HIGH performance liquid chromatography ,LICHENS ,EPIPHYTIC lichens ,DIGESTIVE enzymes ,METABOLITES - Abstract
Previous studies of Eurasian tundra reindeer (Rangifer tarandus tarandus) in Norway indicate that their rumen microbiota play a key role in degrading lichen secondary metabolites. We investigated the presence of usnic acid and atranorin in faecal samples from Svalbard reindeer (R. tarandus platyrhynchus). Samples were collected in Bolterdalen valley together with vegetation samples from the study site. The mesic tundra in this area was dominated by vascular plants (59% of vegetation cover). Bryophytes (16%) and lichens (25%) were also present. Qualitative and quantitative analyses of usnic acid and atranorin in lichen and faeces samples were performed using high-performance liquid chromatography. Contents of atranorin averaged 12.49 ± 0.41 mg g–1 in the thalli of Stereocaulon alpinum, while the average level of usnic acid was lowest in Cladonia mitis (12.75 ± 2.86 mg g–1) and highest in Flavocetraria cucullata (34.87 ± 0.47 mg g–1). Atranorin and usnic acid were detected in the faecal samples, averaging 0.41 ± 0.53 and 0.74 ± 1.11 (mean ± SD) mg g–1 dry matter, respectively. The presence of lichen secondary compounds in faeces from Svalbard reindeer shows that lichens are indeed included in their diet, although probably in small amounts because of depleted pastures. Contrary to previous findings in reindeer on mainland Norway, atranorin and usnic acid are not completely degraded or absorbed in Svalbard reindeer. To elucidate the mechanisms behind detoxification of lichen secondary compounds in reindeer, more research is needed on their respective rumen microbiomes and digestive enzymes. [ABSTRACT FROM AUTHOR]
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- 2019
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61. Exploring the Gut Microbiome Alteration of the European Hare (Lepus europaeus) after Short-Term Diet Modifications
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Anna Padula, Marina Bambi, Chiara Mengoni, Claudia Greco, Nadia Mucci, Ilaria Greco, Alberto Masoni, Sara Del Duca, Giovanni Bacci, Giacomo Santini, Renato Fani, and Marco Zaccaroni
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Lepus europaeus ,gut microbiota ,diet modification ,faecal samples ,hindgut fermenters ,Biology (General) ,QH301-705.5 - Abstract
This study aimed to characterise the gut microbiome composition of European hares (Lepus europaeus) and its potential changes after a short-term diet modification. The high sensitivity of European hare to habitat changes makes this species a good model to analyse possible alterations in gut microbiome after the introduction of additional nourishment into the diet. In total, 20 pairs were chosen for the experiments; 10 pairs formed the control group and were fed with standard fodder. The other 10 pairs represented the experimental group, whose diet was integrated with apples and carrots. The DNA from fresh faecal pellets collected after 4 days from the start of the experiment was extracted and the V3-V4 hypervariable regions were amplified and sequenced using the Illumina MiSeq® platform. The obtained amplicon sequence variants were classified into 735 bacterial genera belonging to 285 families and 36 phyla. The control and the experimental groups appeared to have a homogenous dispersion for the two taxonomic levels analysed with the most abundant phyla represented by Bacteroidetes and Firmicutes. No difference between control and experimental samples was detected, suggesting that the short-term variation in food availability did not alter the hares’ gut microbiome. Further research is needed to estimate significant time threshold.
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- 2021
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62. Wild mammals in Portugal: gut microbiota as a source of pathogenic bacteria and antibacterial resistance
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Dias, Diana Patrícia Pires, Mendo, Sónia, Fonseca, Carlos, and Caetano, Tânia
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qPCR ,Faecal samples ,Escherichia coli ,Whole genome sequencing (WGS) ,Shiga toxin-producing E. coli (STEC) ,Antibiotic resistance genes (ARGs) ,Wildlife ,Antimicrobial resistance (AMR) ,Enterococcus spp - Abstract
As the human population increases and expands, the natural habitats become more fragmented, and wildlife comes into contact with humans and their livestock, increasing the possibility of transmission of pathogens between populations. Antimicrobial resistance (AMR) is a major problem that threats global health security. Several studies investigated AMR in wildlife microbiota, and it has been suggested that the proximity to human populations and their activities impacts wildlife resistome. This raises the possibility of AMR bacteria to spread through the food chain or other routes and disseminate into the environment. The transmission of AMR is a complex, dynamic and multi-layered process, that involves humans, animals, and the environment, being an One Health issue. Little is known about the abundance and diversity of ARGs and MGEs in wildlife. The aim of the present thesis was to characterize the AMR and the shiga toxinproducing Escherichia coli (STEC) linked to the faecal microbiota of four wild mammal species in Portugal: wild boar (Sus scrofa), red deer (Cervus elaphus), Eurasian otter (Lutra lutra) and red fox (Vulpes vulpes). Faecal samples from wild boar (n=56), red deer (n=101), Eurasian otter (n=92) and red fox (n=37) were collected from Montesinho Natural Park, Lousã Mountain, Tapada Nacional de Mafra, Baixo Vouga Lagunar, and Freita, Arada and Montemuro Mountains. The general levels of AMR in two bacterial indicators, E. coli and Enterococcus spp., were determined by antibiotic susceptibility testing, and the faecal resistome of each mammal species was characterized regarding diversity and abundance using qPCR arrays. In general, the E. coli isolates were mainly resistant to β-lactams, aminoglycosides and tetracycline, and had a non-wildtype phenotype mainly for quinolones, β- lactams and tetracycline. The Enterococcus spp. isolates were mostly resistant to glycylcycline, streptogramin, and tetracycline classes, having a non-wildtype phenotype mainly associated with aminoglycoside, tetracycline and macrolide classes. Resistant and multidrug-resistant strains were isolated from the four wild mammal species. In general, the most frequently detected ARGs confer resistance to aminoglycosides, tetracyclines, MLSBs and β-lactams. The most abundant ARGs types differ between mammal species, but tetracycline ARGs were on the top 3 most abundant groups for all the species, and aminoglycoside ARGs were on the top 3 for three animal species (except for otter). High-risk ARGs that may pose a threat to human health were found in the four wildlife species, with the highest relative abundance in red fox. Regarding STEC, the prevalence was of 17%, with strains recovered from the four species, mainly deer. This thesis reports for the first time the occurrence of STEC in Eurasian otter. The phylogenetic relationship of the STEC isolates was assessed by PFGE, and 20 representative isolates were selected for whole genome sequencing. The most abundant serotype identified does not cause disease in humans, but the other four serotypes have been associated with human infections in the EU, highlighting their pathogenetic potential. In addition to Shiga toxin, all genomes encode, at least, 10 additional virulence factors. Also, some wildlife STEC have close evolutionary relationships with human-derived STEC. The results obtained throughout this thesis highlight the relevance of the different wild species as reservoirs of AMR and potential pathogenic STEC. Surveillance of AMR and the development of monitoring programs for commensal and zoonotic bacteria are strategic priorities to limit AMR transmission. Com o aumento e expansão da população humana, os habitats naturais tornam-se cada vez mais fragmentados, passando a existir um maior contacto dos seres humanos e do seu gado com a vida selvagem, aumentando a possibilidade de transmissão de agentes patogénicos entre as diferentes populações (humana e animal). A resistência antimicrobiana (AMR) é um problema mundial que ameaça a saúde e a segurança global. Vários estudos têm investigado a resistência antimicrobiana na microbiota da vida selvagem, e tem sido sugerido que a proximidade das populações humanas, bem como as suas atividades, tem impacto no resistoma da vida selvagem. Este facto levanta a possibilidade de bactérias resistentes a antimicrobianos se propagarem através da cadeia alimentar ou outras vias, disseminando-se no ambiente. A transmissão de AMR é um processo complexo, dinâmico e multifacetado, que envolve os seres humanos, os animais e o ambiente, e é um problema de Saúde Única (One Health). Contudo, ainda pouco se sabe sobre a abundância e diversidade de ARGs e MGEs na vida selvagem. O objetivo da presente tese foi caracterizar a AMR e Escherichia coli produtora de toxina Shiga (STEC) associada à microbiota fecal de quatro espécies de mamíferos selvagens em Portugal: o javali (Sus scrofa), o veado (Cervus elaphus), a lontra euro-asiática (Lutra lutra), e a raposa-vermelha (Vulpes vulpes). Para tal, foram recolhidas amostras de fezes de javali (n=56), veado (n=101), lontra euroasiática (n=92) e raposa-vermelha (n=37), no Parque Natural de Montesinho, Serra da Lousã, Tapada Nacional de Mafra, Baixo Vouga Lagunar, e Serras da Freita, Arada e Montemuro. Os níveis gerais de AMR nos dois indicadores bacterianos, E. coli e Enterococcus spp., foram determinados por testes de suscetibilidade a antibióticos, e a resistência fecal de cada uma das espécies de mamíferos foi caracterizada relativamente à diversidade e abundância, usando matrizes (arrays) de qPCR. De uma forma geral, os isolados de E. coli eram principalmente resistentes aos β-lactâmicos, aminoglicosídeos e tetraciclina, e tinham um fenótipo do tipo não-selvagem, principalmente às quinolonas, aos β- lactâminos e à tetraciclina. Os isolados de Enterococcus spp. exibiam resistência, principalmente, às classes: glicilciclina, estreptogramina e tetraciclina, tendo um fenótipo do tipo não-selvagem associado às classes dos aminoglicosídeos, da tetraciclina e dos macrólidos. Foram isoladas estirpes resistentes e multirresistentes das quatro espécies de mamíferos selvagens. De uma forma geral, os ARGs mais frequentemente detetados conferem resistência aos aminoglicosídeos, às tetraciclinas, aos MLSBs e aos β-lactâmicos. Os tipos de ARGs mais abundantes diferem entre as espécies de mamíferos, sendo que os ARGs de tetraciclina fazem parte dos três grupos mais abundantes para todas as espécies, e os ARGs de aminoglicosídeos também fazem parte dos três grupos mais abundantes, com exceção da lontra. Os ARGs de risco elevado, que podem representar uma ameaça para a saúde humana, foram encontrados nas quatro espécies selvagens, com uma maior abundância relativa na raposa vermelha. Relativamente às STEC, a sua prevalência foi de 17%, tendo sido isoladas das quatro espécies, maioritariamente de veados. Esta tese reporta pela primeira vez a ocorrência de STEC na lontra euro-asiática. A relação filogenética dos isolados STEC foi avaliada por PFGE, e destes, os 20 mais representativos foram selecionados para sequenciação do seu genoma completo. O serotipo mais abundante não é reportado como sendo causador de doença em humanos. Os outros quatro serotipos foram associados a infeções humanas na EU, o que mostra o seu potencial patogénico. Para além da toxina Shiga, todos os genomas codificam para, pelo menos, outros 10 fatores de virulência. Algumas das STEC destes animais selvagens têm relações evolutivas próximas com STEC de origem humana. Os resultados obtidos ao longo desta tese realçam a relevância das quatro espécies selvagens como reservatórios de AMR e de STEC potencialmente patogénica. Assim, a vigilância da AMR e o desenvolvimento de programas de monitorização de bactérias comensais e zoonóticas são prioridades estratégicas para limitar a transmissão da AMR. Programa Doutoral em Biologia
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- 2023
63. Epidemiological survey in Łęczyńsko-Włodawskie Lake District of eastern Poland reveals new evidence of zoonotic potential of Giardia intestinalis
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Krzysztof Stojecki, Jacek Sroka, Tomasz Cencek, and Jacek Dutkiewicz
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Giardia intestinalis ,farm animals ,faecal samples ,Eastern Poland ,Direct Fluorescence Assay ,PCR ,Agriculture ,Environmental sciences ,GE1-350 - Abstract
Faecal samples from 297 farm animals were collected from 18 households in distinct sites of the Łęczyńsko-Włodawskie Lake District of eastern Poland. They included samples from 86 cattle ( Bos taurus ), 84 pigs ( Sus scrofa f. domestica ), 81 sheep ( Ovis aries ), 10 horses ( Equus caballus ), and 36 dogs ( Canis lupus familiaris ). The samples were examined for the presence of Giardia intestinalis by the Direct Fluorescence Assay (DFA) and semi-nested PCR. All amplicons were sequenced on both strands. By DFA, cysts of Giardia spp. were detected in 66 of 297 faecal samples (22.2%). Positive specimens for Giardia spp. were derived from 29.8% of examined pigs, 21.0% of sheep, 18.6% of cattle, 10% of horses, and 19.4% of dogs. Based on the detection of the β-giardin gene by PCR, 39 (13.1%) of the 297 examined samples were recognized as positive. Detection of the presence of Giardia cysts by DFA test was overall significantly higher compared to PCR (p=0.0045). By PCR, Giardia was found in 28.1% of sheep, 11.6% of cattle, 10% of horses, 9.5% of pigs and 5.6% of dogs. Partial β-giardin gene sequences were obtained for 73.7% of the PCR positive samples. From sequenced samples derived from the studied animals, Giardia were identified as assemblage A (8 samples), B (1 sample) and E (18 samples). As assemblages A and B may be zoonotic, the farm animals living in eastern Poland could be regarded as a potential source of Giardia infection for humans.
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- 2015
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64. Blautia parvula sp. nov., isolated from Japanese faecal samples.
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Miura T, Shimamura M, Yamazoe A, and Kawasaki H
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- Humans, Bacterial Typing Techniques, Base Composition, DNA, Bacterial genetics, East Asian People, Fatty Acids chemistry, RNA, Ribosomal, 16S genetics, Sequence Analysis, DNA, Feces microbiology, Phylogeny, Clostridiales classification, Clostridiales isolation & purification
- Abstract
Two Gram-positive, anaerobic, non-spore-forming and coccoid or oval-shaped bacterial strains, namely, DN0138
T and DN0266, were isolated from faecal samples of healthy Japanese people. Phylogenetic analyses based on 16S rRNA gene sequences revealed that strain DN0138T clustered with a species of the genus Blautia and was closely related to Blautia producta JCM 1471T , Blautia coccoides JCM 1395T , Blautia hominis KB1T and ' Blautia marasmi ' Marseille-P2377, with sequence similarities of 98.6, 98.5, 98.8 and 98.2 %, respectively. The average nucleotide identity values were 85.3 % for B. producta JCM 1471T , 85.0 % for B. coccoides NCTC 11035T , 84.3 % for B. hominis KB1T and 84.3 % for ' B. marasmi ' Marseille-P2377. The major end products of glucose metabolism were acetic acid, lactic acid and succinic acid. The genome length of strain DN0138T was 6 247 046 bp with 46.7 mol% G+C content of genome sequence. Based on their phenotypic, cellular fatty acid and phylogenetic characteristics, the three isolates represent a novel species within the genus Blautia , for which the name Blautia parvula sp. nov. is proposed. The type strain is DN0138T (=NBRC 113351T =BCRC 81349T ).- Published
- 2023
- Full Text
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65. Faecal shedding of cryptosporidium oocysts in goats in Nsukka, Enugu State: a potential threat to man
- Author
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I.C. Chukwudi, K.I. Ogbu, S.E. Umeagukwu, F.N. Nnaji, and I.O. Ezeh
- Subjects
Infectious Diseases ,Cryptosporidium oocysts ,WAD goats ,Enugu state ,Faecal samples ,Public health ,Parasitology - Abstract
Cryptosporidiosis is one of the most important diseases in young ruminants causing diarrhoea in neonates and immune-compromised animals leading to substantial economic losses both directly and indirectly in animals and animal products and also imposing public health threats as a zoonotic disease. This study aimed at investigating the occurrence of cryptosporidium oocyst in goats in Nsukka metropolis to facilitate further studies on the zoonotic transmission of the disease agent. Faecal samples were collected from household WAD goats from three randomly selected villages in Nsukka L.G.A of Enugu State. A total of 100 goats were purposively sampled, and faecal samples were collected par rectum using disposable latex gloves and transported to the Veterinary Parasitology laboratory, University of Nigeria, Nsukka for further analysis. Faecal samples were concentrated using the Formol-ether concentration method and cryptosporidium oocysts were detected using a modified Ziehl-Neelsen staining technique. The sample was considered positive when at least one oocyst with the correct morphologic characters was observed. Data obtained were analysed using the Chi-square test and the differences in the prevalence of cryptosporidium oocysts within each variable (Age, sex, and stool consistency) were compared. A probability of less than 0.05 was considered significant. The overall prevalence of cryptosporidium oocysts was 24%. There was a significant association between the prevalence of cryptosporidium oocysts and the sex of the goats sampled, while there were no significant associations between the prevalence of cryptosporidium oocysts and the age of the goats sampled and consistency of the faeces. The wide presence of these oocysts is of public health significance as apparent healthy goats were also shedding the oocysts. Efforts should be directed towards improving our management systems in order to prevent the menace of the public health threat. Further studies are recommended to provide evidence for other sources and factors that might influence cryptosporidiosis in the area.
- Published
- 2022
66. Exposição a microplásticos de aves marinhas pelágicas e costeiras de ambientes temperados e tropicais
- Author
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Silva, Vitor Hugo Corino da, Ramos, Jaime Albino, and Paiva, Vítor Hugo Rodrigues
- Subjects
Portugal ,Ingestão ,Ingestion ,Poluição por Plásticos ,Cabo Verde ,Plastic Pollution ,Faecal Samples ,Amostras Fecais - Abstract
Dissertação de Mestrado em Ecologia apresentada à Faculdade de Ciências e Tecnologia Plástico é, atualmente, o material antropogénico mais comum no ambiente marinho. O estudo da presença e quantidade de plásticos no oceano é um tema cada vez mais abordado, porém o seu estudo comparando Portugal com Cabo Verde não é muito aprofundado. Neste estudo foram analisadas amostras de fezes com o objetivo principal de avaliar o papel da taxonomia, ecologia alimentar e distribuição na ingestão de plásticos por parte de espécies de aves marinhas de Portugal e Cabo Verde.Sete espécies de aves marinhas foram alvo de estudo nesta tese, sendo estas a Gaivota de Audouin (Ichthyaetus audouinii), Cagarra (Calonectris borealis), Cagarra de Cabo Verde (Calonectris edwardsii), Rabo de palha de bico vermelho (Phaethon aethereus), Ganso patola (Sula leucogaster), Bulweria (Bulweria bulwerii) e Pardela de Cabo Verde (Puffinus lherminieri boydi). As amostras destas espécies foram recolhidas em Portugal (Gaivota de Audouin e Cagarra) e em Cabo Verde (Cagarra de Cabo Verde, Rabo de palha de bico vermelho, Ganso patola, Bulweria e Pardela de Cabo Verde) entre fevereiro e setembro de 2021. A presença de plásticos foi analisada usando fezes como proxy de ingestão. Todas as espécies apresentaram presença de plásticos (Ichthyaehus audouinii = 62.5% de frequência de ocorrência; Calonectris borealis = 41.9%; Calonectris edwardii = 86.5%; Phaethon aethereus = 64.7%; Sula leucogaster = 68.5%; Bulweria bulwerii = 35.9%; Puffinus iherminieri boydi = 44.4%). Os resultados deste estudo mostraram que a presença de plásticos nas espécies em estudo não depende apenas da taxonomia das aves marinhas, mas também de fatores intrínsecos e extrínsecos tais como o tamanho da ave, habitat, ecologia alimentar e interação das aves com atividades piscatórias.Os resultados deste estudo forneceram mais evidências para a crescente perceção da omnipresença de plástico no ambiente marinho e apoiou, ainda mais, a utilidade do uso de aves marinhas como sentinelas da poluição por plásticos em regiões neríticas e oceânicas. Plastic is currently the most common anthropogenic material in the marine environment. The study of the presence and quantity of plastics in the ocean is an increasingly discussed topic. However, studies comparing Portugal with Cabo Verde are lacking. In this study feacal samples were analysed with the main objective of evaluating the role of taxonomy, feeding ecology and distribution on the plastic ingestion of Portugal and Cabo Verde seabird species.Seven seabird’s species were studied in this project: Audouin´s gull (Ichthyaetus audouinii), Cory’s shearwater (Calonectris borealis), Cape Verde Shearwater (Calonectris edwardsii), Red-billed Tropicbird (Phaethon aethereus), Brown booby (Sula leucogaster), Bulwer´s Petrel (Bulweria bulwerii) and Boyd´s Shearwater (Puffinus lherminieri boydi). The samples were collected in Portugal (Audouin´s gull and Cory’s shearwater) and in Cabo Verde (Cape Verde Shearwater, Red-billed Tropicbird, Brown booby, Bulwer´s Petrel e Boyd´s Shearwater) between February and September 2021.The presence of plastics was analyzed using faeces as a proxy for ingestion. All species showed presence of plastics (Ichthyaehus audouinii = 62.5% of Frequency of Ocurrence; Calonectris borealis = 41.9%; Calonectris edwardii = 86.5%; Phaethon aethereus = 64.7%; Sula leucogaster = 68.5%; Bulweria bulwerii = 35.9%; Puffinus iherminieri boydi = 44.4%).This study showed that the presence of plastics in the studied species was not only influenced by the seabird’s taxonomy, but is also driven by intrinsic and extrinsic factors such as bird size, habitat, foraging area and interaction of seabirds with fishing activities. Results from this study provide more evidence to our growing perception on the ubiquity of plastic pollution in the marine environment and further supported the usefulness of using seabirds as sentinels of plastic pollution in both neritic and oceanic regions.
- Published
- 2022
67. Studies of nonhuman primates: key sources of data on zoonoses and microbiota.
- Author
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Davoust, B., Levasseur, A., and Mediannikov, O.
- Subjects
- *
ZOONOSES , *HUMAN microbiota , *MALARIA , *HIV , *MONKEYPOX - Abstract
Abstract The genetic and morphologic similarities between primates and humans means that much information obtained from primates may be applied to humans, and vice versa. However, habitat loss, hunting and the continued presence of humans have a negative effect on the biology and behaviour of almost all nonhuman primates. Noninvasive methods such as stool collection are among the safest alternative ways to study the multiple aspects of the biology of primates. Many epidemiologic issues (e.g. pathogen detection, microbiota studies) may be easily studied using stool samples from primates. Primates are undoubtedly among the first candidates suspected of becoming the source of one of the next emerging epidemic of zoonotic origin, as has already been observed with HIV, malaria and monkeypox. The Institut Hospitalo-Universitaire Méditerranée Infection in Marseille actively participates in the study, mostly epidemiologic, of nonhuman primates, using mostly stool samples. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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68. Ecological preferences of large carnivores in remote, high-altitude protected areas: insights from Buxa Tiger Reserve, India.
- Author
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Sarkar, Mriganka Shekhar, Segu, Harika, Bhaskar, J. V., Jakher, Rajendra, Mohapatra, Swati, Shalini, K., Shivaji, S., and Reddy, P. Anuradha
- Subjects
- *
TOP predators , *HABITAT suitability index models , *TIGERS - Abstract
Difficult terrain and inclement weather limit our knowledge of large predators, such as the tiger Panthera tigris, in the Himalayas. A lack of empirical data on large carnivores can lead to mismanagement of protected areas and population declines. We used non-invasive genetic and remote sensing data to inform the management of such high-altitude protected areas. We used the tiger as a focal species to investigate prey preference and habitat suitability in India's Buxa Tiger Reserve, which encompasses several eco-geographical regions in the Himalayan and subtropical zones. During 2010–2013, 909 faecal samples were collected, of which 372 were confirmed, using genetic analysis, to be of tiger origin. Fourteen prey species/groups were identified in 240 tiger faecal samples, largely dominated by goats Capra spp. (26.59%), rhesus macaques Macaca mulatta (22.22%) and cattle Bos spp. (20.63%). Considering only the wild prey species for which survey data are available, however, and frequency of occurrence of prey in faecal samples, hog deer Axis porcinus, sambar deer Rusa unicolor and spotted deer Axis axis were the most preferred prey species. Using faecal sample locations to examine the relationship between tiger presence and environmental features indicated that the niche for tigers is narrower than the available protected area: c. 62% of core protected area is suitable, of which only 17% is highly suitable for tigers. Tigers prefer dense vegetation, open forests, riverine vegetation and areas close to water sources. Faecal sample-based studies have the potential to generate data that can help us understand the ecology of elusive carnivore species inhabiting high-altitude landscapes. [ABSTRACT FROM PUBLISHER]
- Published
- 2018
- Full Text
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69. Scrutinizing key steps for reliable metabarcoding of environmental samples.
- Author
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Alberdi, Antton, Aizpurua, Ostaizka, Gilbert, M. Thomas P., and Bohmann, Kristine
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BAR codes ,ENVIRONMENTAL sampling ,ARTHROPODA ,TAXONOMY ,CHIMERISM - Abstract
Abstract: Metabarcoding of environmental samples has many challenges and limitations that require carefully considered laboratory and analysis workflows to ensure reliable results. We explore how decisions regarding study design, laboratory set‐up, and bioinformatic processing affect the final results, and provide guidelines for reliable study of environmental samples. We evaluate the performance of four primer sets targeting COI and 16S regions characterizing arthropod diversity in bat faecal samples, and investigate how metabarcoding results are affected by parameters including: (1) number of PCR replicates per sample, (2) sequencing depth, (3) PCR replicate processing strategy (i.e. either additively, by combining the sequences obtained from the PCR replicates, or restrictively, by only retaining sequences that occur in multiple PCR replicates for each sample), (4) minimum copy number for sequences to be retained, (5) chimera removal, and (6) similarity thresholds for Operational Taxonomic Unit (OTU) clustering. Lastly, we measure within‐ and between‐taxa dissimilarities when using sequences from public databases to determine the most appropriate thresholds for OTU clustering and taxonomy assignment. Our results show that the use of multiple primer sets reduces taxonomic biases and increases taxonomic coverage. Taxonomic profiles resulting from each primer set are principally affected by how many PCR replicates are carried out per sample and how sequences are filtered across them, the sequence copy number threshold and the OTU clustering threshold. We also report considerable diversity differences between PCR replicates from each sample. Sequencing depth increases the dissimilarity between PCR replicates unless the bioinformatic strategies to remove allegedly artefactual sequences are adjusted according to the number of analysed sequences. Finally, we show that the appropriate identity thresholds for OTU clustering and taxonomy assignment differ between markers. Metabarcoding of complex environmental samples ideally requires (1) investigation of whether more than one primer sets targeting the same taxonomic group is needed to offset primer biases, (2) more than one PCR replicate per sample, (3) bioinformatic processing of sequences that balance diversity detection with removal of artefactual sequences, and (4) empirical selection of OTU clustering and taxonomy assignment thresholds tailored to each marker and the obtained taxa. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
70. Diagnostic study of internal parasites in camels of Al- diwaniya government
- Author
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Azhar chaffat karawan
- Subjects
Al- diwaniya government ,camales ,faecal samples ,intestinal parasites ,Veterinary medicine ,SF600-1100 - Abstract
This study was carried out to detect the prevalence of intestinal parasites of camels in Diwanyiah city in 2016 by faecal examination. . A total of 110 faecal samples were examined, among them,95 camels were found infected with intestinal parasites by one or more species with percentage reach to 86.36% , Fasciola spp was maximum (31%), followed by Eimeria spp (26%) ,Cryptosporidium spp (17.89%) ,Nematodirus spp(7.36%),Trichostrongylus spp (6.31%) ,Moneizia spp(5.26%) and Trichuris spp (3.1%).Due to the lack of available studies on infected the camales by internal parasites in Al- diwaniya government This study was conducted for the purpose of diagnosis of the most important internal parasites in camales.
- Published
- 2017
- Full Text
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71. Public health risk of some milk borne pathogens
- Author
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Mohamed M.A. Zeinhom and Gihan K. Abdel-Latef
- Subjects
Raw milk ,Zoonoses ,Aeromonas ,Escherichia coli ,Salmonella ,Faecal samples ,Medicine (General) ,R5-920 ,Science - Abstract
A total of 150 samples of raw milk, 75 each of farm and market milk were collected from different farms and supermarkets in Beni-Suef Governorate, in addition to 30 stool samples from milk handlers and 25 milker's hand swabs were examined for the presence of Escherichia coli, E. coli O157:H7, Salmonella, Aeromonas and Yersinia. Isolates were identified biochemically and serologically. The obtained results revealed that E. coli was detected in a percentage of 26.7% and 16% in the examined raw market and bulk farm milk respectively, while in stool and hand swabs samples were 16.6% and 16%, respectively. E. coli O157:H7 and Salmonella spp. failed to be detected in any of the examined samples. Additionally, 45% and 16.7% of the recovered E. coli strains from the examined raw market and farm milk samples were enteropathogenic O166, while 55% and 83.3 were untypable, respectively. On the other hand 60% of human stool samples isolates were O 148 and 40% of the isolates were untypable, while 100% of the hand swab isolates were untypable. The results also exhibits isolation rate of Aeromonas hydrophila in a percentage of 24%, 13.3%, 10% and 16% from market milk, farm milk samples, stool and hand swabs respectively. While Yersinea enterocolitica represent 3.3% in the stool samples only. The public health significance of isolated strains as well as suggested control measures were discussed.
- Published
- 2014
- Full Text
- View/download PDF
72. Occurrence and diversity of Eimeria species in cattle in Hamedan province, Iran
- Author
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H. Heidari, Z. Sadeghi-Dehkordi, R. Moayedi, and J. Gharekhani
- Subjects
eimeria spp. ,opg ,risk factors ,faecal samples ,calf age ,iran ,Veterinary medicine ,SF600-1100 - Abstract
Information on the occurrence, diversity and economic losses due to Eimeria infection on cattle farms is lacking in Western Iran. The principal aim of this study was to determine the prevalence and diversity of Eimeria species in cattle in Hamedan province, Western Iran. In a cross-sectional study performed from June 2010 to April 2013, 400 faecal samples were collected randomly from animals without clinical signs from different cattle farms of Hamedan province and examined for Eimeria species infection using parasitology methods. The overall infection rate of Eimeria species was 8.25%. Nine species of Eimeria were identified including: E. bovis (23.7%), E. zuernii (19.2%), E. canadensis (12.6%), E. ellipsodalis (11.4%), E. alabamensis (10.4%), E. pellita (9.1%), E. auburnensis (6.8%), E. cylindrica (4.6%) and E. bukidnonensis (2.3%). There were statistically significant differences with respect to Eimeria infection and age group (P < 0.0001, OR = 6), although no statistically significant relationships were found for sex (P = 0.35) or faecal consistency (P = 0.587). In conclusion, this study is the first to report the prevalence and diversity of Eimeria species in cattle in Hamedan province. Infection with pathogenic Eimeria spp. was asymptomatic in all animals; this is the reason for the transmission of infection by carriers in this region. Therefore, integrated strategies should be utilised to prevent and control Eimeria spp. infection on cattle farms.
- Published
- 2014
- Full Text
- View/download PDF
73. Whole-metagenome shotgun sequencing of pig faecal microbiome
- Author
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Anna Maria Sutera, Giuseppe Tardiolo, Domenico Giosa, Letterio Giuffrè, Riccardo Aiese Cigliano, Grazia Galeano, Alessandro Zumbo, Orazio Romeo, Andreu Paytuví-Gallart, and Enrico D'Alessandro
- Subjects
pig ,Shotgun sequencing ,microbiome ,Computational biology ,faecal samples ,Biology ,SF1-1100 ,Animal culture ,Metagenomics ,nero siciliano pig ,Animal Science and Zoology ,Microbiome ,whole-metagenome sequencing ,Nero Siciliano pig, whole-metagenome sequencing, microbiome, pig, faecal samples - Abstract
Here, we sequenced the faecal microbiome of a local pig breed by using whole-metagenome sequencing. Metagenomic data revealed that the faecal microbiome consists of a complex and intricate admixture of microbes belonging to all domains of life, including viruses. Most of sequencing reads were mapped to multiple reference sequences of Bacteria (99.35%) whereas the remaining reads (0.65%) were assigned to different microbes belonging to Archaea, Eukarya, and viruses. The predominant bacterial phylum was Firmicutes (∼86%), whereas Ascomycota division (fungi) was the most abundant eukaryotic phyla found. BLAST homology search showed that viral reads could be assigned to a total of 13 viral families of which 7 were present in all metagenomes. Bioinformatics analysis identified a catalogue of microbial genes encoding 231,428 unique proteins grouped in 3,169 functional groups and involved in 275 biochemical pathways. This study represents a first attempt to explore the faecal microbiome of a local pig breed in order to expand our knowledge about the taxonomic and functional profiles of microbes associated with this rare and endangered-maintained pig breed.Highlights Sequenced the faecal microbiome of a local pig breed by using whole-metagenome sequencing. Bioinformatics analysis identified a catalogue of microbial genes. The predominant bacterial phylum was Firmicutes (∼86%), whereas Ascomycota division (fungi) was the most abundant eukaryotic phyla found.
- Published
- 2021
74. Prevalence of Canine Parvo Viral Infection in Dogs in and around Navsari District of Gujarat State, India.
- Author
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Mehta, S. A., Patel, R. M., Vagh, A. A., Mavadiya, S. V., Patel, M. D., Vala, J. A., and Parmar, S. M.
- Subjects
- *
VIRUS diseases in cattle , *CANINE parvovirus , *DOG parasites , *DOG breeds , *DOG vaccination - Abstract
A total of 145 faecal samples were collected from the dogs suspected for canine parvovirus (CPV) infection over a period of one year from April, 2016 to March, 2017. The faecal samples were screened by HA, Scan Vet Parvo kit and PCR. Out of 145 dog faecal samples screened, 63 samples were positive with an overall prevalence of 43.44 %. Breed wise analysis of data indicated higher prevalence in indigenous breeds (46.67%) than the exotic breeds (42.00%). CPV infection in relation to age was highest (54.05%) in 0-2 months and least (30.43%) in above 4-6 months old dogs. Sex wise analysis revealed the higher prevalence (48.15%) in female dogs than male (40.66%). Month wise prevalence of CPV infection was found highest (65.00%) in February and lowest (12.50%) in June. The prevalence of CPV infection was high (44.03%) in unvaccinated dogs than the vaccinated dogs (36.36%). The findings suggested need of adopting rigorous control and preventive measures against this disease particularly in young dogs. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
75. Morphometric and scanning electron microscopy based identification of Ancylostoma caninum parasites in dog.
- Author
-
Uppal, Harsimarandeep, Bal, Mandeep, Singla, L., Kaur, Paramjit, and Sandhu, B.
- Abstract
Ancylostoma caninum, a blood feeding nematode parasite (Family: Ancylostomatidae, Superfamily: Ancylostomatoidea) can cause anaemia, dark reddish-brown to black haemorrhagic diarrhoea, dehydration, wasting and deaths due to heavy blood loss. Adult hook worm parasites recovered from the intestine of a stray dog at the time of necropsy were identified as A. caninum based on morphological characters and morphometric observations involving scanning electron microscopy (SEM). Different developmental stages of hookworm eggs viz. 8 cell stage, morula, gastrula and vermiform were observed during the culture process of faecal sample. High quality SEM photographs showed teeth of dimensions 52.5, 42.3 and 23.5 μm on one side and 55.4, 43.8 and 21.0 μm on the other side along with the presence of characteristic transverse cuticular striations on body surface of A. caninum parasites. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
76. Suiformes conservation: a study case of strategies for DNA utilization.
- Author
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OLIVEIRA-MONTEIRO, NÁDIA, LOPES-RODRIGUES, VANESSA, BASTOS, ESTELA, and GUEDES-PINTO, HENRIQUE
- Subjects
- *
SWINE , *DNA , *NUCLEIC acid isolation methods , *BLOOD , *GENE flow - Abstract
A case study of strategies for use of suiformes conservation DNA utilization. Topics discussed include evolution and sustainable management of specific wildlife species, genomic DNA extraction from muscular tissue, and using innovative MDA methods to amplify human DNA from various sources, including blood.
- Published
- 2016
- Full Text
- View/download PDF
77. A non-invasive tool for assessing pathogen prevalence in koala ( Phascolarctos cinereus) populations: detection of Chlamydia pecorum and koala retrovirus (KoRV) DNA in genetic material sourced from scats.
- Author
-
Wedrowicz, Faye, Saxton, Tom, Mosse, Jennifer, Wright, Wendy, and Hogan, Fiona
- Abstract
Pathogenic diseases may threaten the viability of wild animal populations, especially when already vulnerable. The mitigation of risks associated with pathogenic infections in populations is an important factor in conservation strategies. Koalas are of conservation concern across the north of their range and are affected by two main pathogens; Chlamydia pecorum and the koala retrovirus (KoRV). This study tested whether DNA from C. pecorum and KoRV could be detected in genetic material isolated from koala scats. Detection of C. pecorum in scat isolated DNA samples was compared with results obtained from urogenital swabs collected from the same individuals as part of an independent study. The ability to detect KoRV in scats from both northern and southern regions of the koala's range was also assessed. There was a high level of concordance (5/6) between the detection of C. pecorum in DNA isolated from scats and urogenital swabs from the same individual. In positive samples, C. pecorum ompA genotypes were identical between DNA from scats and urogenital swabs in two out of three cases. In samples from the south of the koala's range, KoRV copy number was higher in DNA isolated from scats compared to DNA isolated from ear tissue, potentially indicating the detection of horizontally acquired infections. Our results demonstrate the ability to detect C. pecorum and KoRV in DNA isolated from koala scats. This method will be useful for studying the prevalence, transmission and impact of these pathogens in wild populations which may subsequently inform conservation management strategies. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
78. Isolation and identification of Shigella spp. from human fecal samples collected from Pantnagar, India
- Author
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Abhishek Gaurav, S P Singh, J.P.S. Gill, Rajeev Kumar, and Deepak Kumar
- Subjects
cultural and biochemical characters ,diarrhoea ,faecal samples ,Shigella ,Animal culture ,SF1-1100 ,Veterinary medicine ,SF600-1100 - Abstract
Aim: To isolate and identify Shigella species from faecal samples based on cultural and biochemical tests. Material and Methods: For the isolation of Shigella spp., faecal samples from cattle, poultry and humans were collected from various locations of Pantnagar. Fecal specimens were processed according to standard protocols. Results: Out of 511 fecal samples (311 human, 100 cattle and 100 poultry faecal samples) analyzed, 8 isolates of Shigella species were confirmed on the basis of Gram stain, morphology, cultural identification and biochemical characters. All the 8 Shigella isolates were obtained from human stool samples giving a prevalence rate of 2.57%. Conclusion: Under the conditions of the current study, Shigella species were prevalent in human population although in small numbers, whereas it was not isolated from cattle and poultry samples. [Vet World 2013; 6(7.000): 376-379]
- Published
- 2013
- Full Text
- View/download PDF
79. A description of village chicken production systems and prevalence of gastrointestinal parasites: Case studies in Limpopo and KwaZulu-Natal provinces of South Africa
- Author
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Dikeledi P. Malatji, Anna M. Tsotetsi, Este van Marle-Koster, and Farai C. Muchadeyi
- Subjects
Helminthes ,Village chickens ,Smallholder farming systems ,Faecal samples ,Veterinary medicine ,SF600-1100 - Abstract
The majority of rural households in developing countries own village chickens that are reared under traditional scavenging systems with few inputs and exposure to various parasitic infestations. Understanding of the village chicken farming system and its influence on helminth infestation is a prerequisite for optimal prevention and control strategies. This study investigated the village chicken production system and associated gastrointestinal parasites in 87 households from Limpopo (n = 39) and KwaZulu-Natal (n = 48) provinces of South Africa. A total of 191 village chicken faecal samples and 145 intestines were collected to determine the prevalence of gastrointestinal parasites in villages of Limpopo and KwaZulu-Natal provinces, respectively. The faecal floatation analysis of samples from Limpopo and KwaZulu-Natal provinces indicated infestations by Ascaridia galli (18.77%), Heterakis gallinarum (15.56%) and Capillaria spp. (4.00%); tapeworms Choanotaenia infundibulum (2.10%) and Raillietina cesticillus (6.00%) and Eimeria spp. (29.46%). Mixed infestations were observed in five (4.90%) samples from Limpopo province and in only four (4.49%) from KwaZulu-Natal province, of which 1.12% were a mixture of C. infundibulum and Eimeria spp. and 3.37% a combination of H. gallinarum and Eimeria spp. In Limpopo, 2.94% of the chickens were positive for H. gallinarum and Eimeria spp., whilst 0.98% had A. galli and Capillaria spp. infestations. Further investigation is needed to understand the impact of gastrointestinal parasites on village chicken health and production and develop appropriate intervention and control strategies feasible for smallholder farmers. Keywords: Helminthes; Village chickens; Smallholder farming systems; Faecal samples
- Published
- 2016
- Full Text
- View/download PDF
80. Genetic heterogeneity of canine bufaviruses
- Author
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Paola Fruci, Barbara Di Martino, Federica Di Profio, Giovanni Aste, Andrea Palombieri, Marsilio Fulvio, Krisztián Bányai, Vittorio Sarchese, Vito Martella, and Irene Melegari
- Subjects
food.ingredient ,Genotype ,040301 veterinary sciences ,viruses ,Protoparvovirus ,Parvoviridae ,Virus ,Enteritis ,Parvoviridae Infections ,canine bufavirus ,genetic heterogeneity ,0403 veterinary science ,Feces ,03 medical and health sciences ,Dogs ,food ,medicine ,Animals ,Human virome ,Dog Diseases ,protoparvovirus ,Phylogeny ,030304 developmental biology ,0303 health sciences ,General Veterinary ,General Immunology and Microbiology ,biology ,Phylogenetic tree ,Genetic heterogeneity ,Canine parvovirus ,faecal samples ,04 agricultural and veterinary sciences ,General Medicine ,biology.organism_classification ,medicine.disease ,Virology - Abstract
Canine bufavirus (CBuV) is a protoparvovirus, genetically related to human and non-human primate bufaviruses and distantly related to canine parvovirus type 2 (CPV-2). CBuV was initially identified from young dogs with respiratory signs but subsequent studies revealed that this virus is also a common component of the canine enteric virome. In this survey, by assessing archival and recent collections of dogs faecal samples, CBuV DNA was detected with a higher prevalence rate (8.8%) in animals with enteritis than in control animals (5.0%), although this difference was not statistically significant. The rate of co-infections with other enteric viruses in diarrhoeic dogs was high (84.6%), mostly in association with canine parvovirus CPV-2 (90.1%). The complete ORF2 gene was determined in five samples, and the nearly full-length genome was reconstructed for three strains, 62/2017/ITA, 9AS/2005/ITA and 35/2018/ITA. Upon sequence comparison, the viruses appeared highly conserved in the NS1 (97.2%-97.9% nt and 97.5%-98.1% aa identities). In the complete VP2 coding region, three strains were similar to the prototype viruses (99.7-99.8 nt and 99.6%-99.8% aa) whilst strains 9AS/2005/ITA and 35/2016/ITA were distantly related (87.6%-89.3% nt and 93.9%-95.1% aa identities). Interestingly, genetic diversification occurred downstream conserved regions such as the VP1/VP2 splicing signals and/or the G-rich motif in the N terminus of the VP2, suggesting a potential recombination nature. Upon phylogenetic analysis, the two divergent CBuV strains formed a distinct cluster/genotype.
- Published
- 2020
81. OCCURRENCE OF ZOONOTIC PARASITIC AGENTS IN FAECAL SAMPLES OF DOMICILIATED DOGS OF GUARULHOS CITY, SP, BRAZIL
- Author
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Santos, S.V. dos and Castro, J. M. de
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protozoários ,protozoa ,dogs ,Zoonoses ,cães ,helminthes ,faecal samples ,fezes ,helmintos - Abstract
RESUMO Foram analisadas amostras fecais de cães domiciliados provenientes de Guarulhos, SP, para se determinar a ocorrência de agentes parasitários de zoonoses. Das 166 amostras examinadas, 54 (32,53%) apresentaram-se positivas, com uma maior freqüência de Giardia duodenalis (13,25%), seguido de Ancylostoma spp. (10,84%), Dipylidium caninum (2,41%) e Toxocara canis (1,81%). ABSTRACT Samples of faeces from domiciliated dogs of Guarulhos, SP, were analyzed to determine the occurrence of zoonotic parasitic agents. From 166 samples examined, 54 (32.53%) were positive, with a frequency of Giardia duodenalis (13.25%), followed by Ancylostoma spp. (10.84%), Dipylidium caninum (2.41%) and Toxocara canis (1.81%).
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- 2022
82. Comparison of the detection efficiency of haemoparasite DNA in blood and faecal samples – the way to eco-epidemiological studies
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Mohammed Alsarraf, Katarzyna Tołkacz, Dorota Dwużnik, Anna Bajer, and Ewa J. Mierzejewska
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Veterinary medicine ,Vulpes ,animal diseases ,Babesia ,Foxes ,Polymerase Chain Reaction ,lcsh:Agriculture ,Feces ,Mice ,Dogs ,red fox ,Babesiosis ,parasitic diseases ,medicine ,hepatozoon canis ,Animals ,Humans ,Waste Management and Disposal ,Ecology, Evolution, Behavior and Systematics ,lcsh:Environmental sciences ,lcsh:GE1-350 ,Mice, Inbred BALB C ,biology ,Coccidiosis ,Public Health, Environmental and Occupational Health ,lcsh:S ,faecal samples ,DNA, Protozoan ,biology.organism_classification ,medicine.disease ,Coccidia ,genomic DNA ,Canis ,Blood ,babesia vulpes ,babesia canis ,Babesia canis ,babesia microti ,faeces ,Nested polymerase chain reaction - Abstract
Introduction and objective It is easier and non-invasive to obtain faecal samples compared with blood samples. Molecular techniques may enable detection of parasites even in tiny amounts of blood-containing faeces. We aimed to compare the sensitivity of detection of three Babesia species and Hepatozoon canis in blood and faecal samples, including samples derived from naturally infected hosts. Material and methods Three groups were involved: 1) Nine BALB/c mice infected with Babesia microti sampled during acute (n=3), post-acute (n=3) and chronic phases of infection (n=3); 2) Eight dogs with symptoms of babesiosis; 3) Six red foxes infected with B. vulpes, one fox infected with B. canis, four foxes infected with H. canis. Genomic DNA was extracted from blood and faeces by use of commercial kits and amplified with genus-specific primers in one-step or nested PCR reactions. Selected PCR products were sequenced. Results No positive results for faecal samples were obtained from H. canis-positive foxes in contrast to Babesia spp. infections. Positive results from PCRs were obtained for all BALB/c mice (100%), five dogs (62.5%) and four of seven foxes (57.1%). Successful sequencing was obtained for six selected murine samples (B. microti), four canine samples (B. canis) and for one fox sample (B. vulpes). The success of B. microti detection in murine faecal samples from acute, post-acute and chronic phases was identical (100%). Conclusions Detectability of Babesia spp. infections was lower in naturally infected dogs and foxes, compared to experimentally infected mice. Detection of DNA in faecal samples can be useful in the detection of Babesia infection in populations from which blood samples are hard to obtain, but due regard must be given to the possibility that prevalence of infection may be severely underestimated.
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- 2019
83. Occurrence of Escherichia coli non-susceptible to quinolones in faecal samples from fluoroquinolone-treated, contact and control pigs of different ages from 24 Swiss pig farms
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Morena Laura Amsler, Roger Stephan, Katrin Zurfluh, Xaver Sidler, Sonja Hartnack, Dolf Kümmerlen, University of Zurich, and Kümmerlen, Dolf
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Veterinary medicine ,040301 veterinary sciences ,medicine.drug_class ,medicine.disease_cause ,Fluoro−/quinolone resistance ,0403 veterinary science ,03 medical and health sciences ,Environmental samples ,Escherichia coli ,medicine ,Pig farming ,10599 Chair in Veterinary Epidemiology ,Pig farms ,Small Animals ,Feces ,10082 Institute of Food Safety and Hygiene ,lcsh:SF1-1100 ,0303 health sciences ,lcsh:Veterinary medicine ,biology ,630 Agriculture ,030306 microbiology ,Research ,04 agricultural and veterinary sciences ,Quinolone ,biology.organism_classification ,Ciprofloxacin ,10187 Department of Farm Animals ,3401 Veterinary (miscellaneous) ,Faecal samples ,3404 Small Animals ,lcsh:SF600-1100 ,Post weaning ,570 Life sciences ,Pigs ,Animal Science and Zoology ,lcsh:Animal culture ,1103 Animal Science and Zoology ,Bacteria ,3403 Food Animals ,medicine.drug - Abstract
Background Despite their indispensability in human medicine, fluoroquinolones (FQ) are used for the treatment of bacterial infections in farm animals which increases the risk of transferring FQ-resistant bacteria into the environment and via the food chain to humans. The objectives of this observational study were to follow-up of the presence of quinolone non-susceptible Escherichia coli (QNSE) qualitatively and quantitatively in faecal samples of pigs at four time points (2 weeks old, 4 weeks old, 2 weeks post weaning and during fattening period). Moreover differences between groups of FQ-treated pigs, pigs with contact to treated pigs and control pigs were investigated. Additionally, quinolone and FQ resistance of Escherichia coli isolates of the faecal samples were investigated by determining minimum inhibitory concentrations (MICs). Results 40.9% of 621 fecal samples contained QNSE. Proportion of samples with detectable QNSE from treated and contact pigs did not differ significantly and were highest in piglets of 2 and 4 weeks of age. However, the proportions of samples with QNSE were significantly lowest in control pigs (7/90; 7.8%; CI = 3.5–14.7%) among all groups. Also, the number of colony-forming units was lowest in both weaners and fattening pigs of the control group compared to treated and contact groups. Following CLSI human breakpoints, in total, 50.4% out of 254 isolates in faecal samples were intermediate or resistant to ciprofloxacin. Conclusions QNSE were present in faeces of pigs independent of age or FQ background but significantly less were found in pigs from farms without FQ usage. Due to the long half-life of FQ, it is likely that only a prolonged absence of fluoroquinolone treatments in pig farming will lead to a reduced frequency of QNSE in the farm environment. Solutions need to be found to minimise the emergence and transfer of quinolone and FQ-resistant bacteria from treated pigs to contact pigs and to farms without FQ usage.
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- 2021
84. Diagnosis of group A rotavirus infection in piglets by polymerase chain reaction targeting gene segment 6
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Rout, M. and Saikumar, G.
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- 2012
85. First Detection of Antibodies Against African Swine Fever Virus in Faeces Samples.
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Nieto ‐ Pelegrín, E., Rivera ‐ Arroyo, B., and Sánchez ‐ Vizcaíno, J. M.
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IMMUNOGLOBULIN analysis , *AFRICAN swine fever virus , *ENZYME-linked immunosorbent assay , *HEMORRHAGIC fever , *VIRAL proteins , *IMMUNOENZYME technique , *VACCINATION - Abstract
African swine fever ( ASF) is a viral, highly lethal haemorrhagic disease of swine with no available vaccine or effective treatment. Introduction of ASF into a country triggers immediate restriction measures that cause significant economic losses and threatens spread to neighbouring countries. Wild boar populations have been recently assigned an essential role in the spread of African swine fever virus ( ASFV) to European countries. Therefore, effective surveillance and monitoring of wild boar populations is required, but sampling wild boar is logistically challenging and expensive. This study assessed the feasibility of detecting antibodies against ASFV in faeces for later implementation in surveillance and control programmes. Two groups of pigs were experimentally infected with an attenuated ASFV isolate Ken05, and blood, oral fluid and faecal samples were tested for the presence of viral DNA using quantitative real-time polymerase chain reaction (q PCR) to monitor infection progress. Faecal samples were analysed using two indirect enzyme-linked immunosorbent assays ( ELISAs) based on semipurified viral protein (vp) 72 or purified recombinant vp30 expressed in mammalian cells. Faecal samples from 9 of 10 pigs with non-haemorrhagic diarrhoea tested positive for antibodies against ASFV using the two ELISA tests that showed a positive correlation. The serum sample results from the two indirect ELISAs were compared against results from the reference ELISA technique and the immunoperoxidase test. Our findings indicate the feasibility of faecal sampling for detecting anti- ASFV antibodies, which may provide a practical non-invasive alternative for sampling wild boar populations. In conclusion, the application of these ELISA tests to faecal field samples could be particularly useful to screen for the presence of ASF in field conditions. [ABSTRACT FROM AUTHOR]
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- 2015
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86. Maximizing the acquisition of unique reads in noninvasive capture sequencing experiments
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La Caixa, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Max Planck Society, Heinz L. Krekeler Foundation, Fundación la Caixa, European Research Council, European Commission, Howard Hughes Medical Institute, Generalitat de Catalunya, Fontsere, Claudia, Alvarez-Estape, Marina, Lester, Jack D., Arandjelovic, Mimi, Kuhlwilm, Martin, Dieguez, Paula, Agbor, Anthony, Angedakin, Samuel, Ayimisin, Emmanuel Ayuk, Bessone, Mattia, Brazzola, Gregory, Deschner, Tobias, Eno-Nku, Manasseh, Granjon, Anne‐Céline, Head, Josephine, Kadam, Parag, Kalan, Ammie K., Kambi, Mohamed, Langergraber, Kevin E., Lapuente, Juan, Maretti, Giovanna, Ormsby, Lucy Jayne, Piel, Alex, Robbins, Martha M., Stewart, Fiona, Vergnes, Virginie, Wittig, Roman M., Kühl, Hjalmar, Marqués-Bonet, Tomàs, Hughes, David A., Lizano, Esther, La Caixa, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Max Planck Society, Heinz L. Krekeler Foundation, Fundación la Caixa, European Research Council, European Commission, Howard Hughes Medical Institute, Generalitat de Catalunya, Fontsere, Claudia, Alvarez-Estape, Marina, Lester, Jack D., Arandjelovic, Mimi, Kuhlwilm, Martin, Dieguez, Paula, Agbor, Anthony, Angedakin, Samuel, Ayimisin, Emmanuel Ayuk, Bessone, Mattia, Brazzola, Gregory, Deschner, Tobias, Eno-Nku, Manasseh, Granjon, Anne‐Céline, Head, Josephine, Kadam, Parag, Kalan, Ammie K., Kambi, Mohamed, Langergraber, Kevin E., Lapuente, Juan, Maretti, Giovanna, Ormsby, Lucy Jayne, Piel, Alex, Robbins, Martha M., Stewart, Fiona, Vergnes, Virginie, Wittig, Roman M., Kühl, Hjalmar, Marqués-Bonet, Tomàs, Hughes, David A., and Lizano, Esther
- Abstract
Noninvasive samples as a source of DNA are gaining interest in genomic studies of endangered species. However, their complex nature and low endogenous DNA content hamper the recovery of good quality data. Target capture has become a productive method to enrich the endogenous fraction of noninvasive samples, such as faeces, but its sensitivity has not yet been extensively studied. Coping with faecal samples with an endogenous DNA content below 1% is a common problem when prior selection of samples from a large collection is not possible. However, samples classified as unfavourable for target capture sequencing might be the only representatives of unique specific geographical locations, or to answer the question of interest. To explore how library complexity may be increased without repeating DNA extractions and generating new libraries, in this study we captured the exome of 60 chimpanzees (Pan troglodytes) using faecal samples with very low proportions of endogenous content (<1%). Our results indicate that by performing additional hybridizations of the same libraries, the molecular complexity can be maintained to achieve higher coverage. Also, whenever possible, the starting DNA material for capture should be increased. Finally, we specifically calculated the sequencing effort needed to avoid exhausting the library complexity of enriched faecal samples with low endogenous DNA content. This study provides guidelines, schemes and tools for laboratories facing the challenges of working with noninvasive samples containing extremely low amounts of endogenous DNA.
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- 2021
87. Gastrointestinal parasitic infections in dogs in Puducherry
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Das, S.S., Kumar, D., Sreekrishnan, R., and Ganesan, R.
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- 2009
88. Prevalence of Coccidia in Mathura Region of Uttarpradesh
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Hari Om and Sanjiv Kumar and Pawanjit Singh
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Faecal samples ,Coccidia ,Morphology ,Sporulation ,Parasite ,Animal culture ,SF1-1100 ,Veterinary medicine ,SF600-1100 - Abstract
The present was done in sheep in Mathura region to identify the parasitic infections which was proving to be very harmful to them. For this purpose faecal samples were collected and examined. Maximum cases were found to be positive for coccidia. Prevalence of coccidian was further categorized in the basis of age of sheep and months of year. Samples were incubated for their sporulation and the five Eimeria species was identified on their morphology. It was found that maximum infection is in age group of below six months and in month of October. The individual species prevalence was more for Eimeria ovina and that the favorable temperature for all the five species of Eimeria ranged between 30°C and 37°C. [Veterinary World 2010; 3(11.000): 503-505]
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- 2010
89. Epidemiological survey in Łęczyńsko-Włodawskie Lake District of eastern Poland reveals new evidence of zoonotic potential of Giardia intestinalis.
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Stojecki, Krzysztof, Sroka, Jacek, Cencek, Tomasz, and Dutkiewicz, Jacek
- Abstract
Faecal samples from 297 farm animals were collected from 18 households in distinct sites of the Łęczyńsko-Włodawskie Lake District of eastern Poland. They included samples from 86 cattle (Bos taurus), 84 pigs (Sus scrofa f. domestica), 81 sheep (Ovis aries), 10 horses (Equus caballus), and 36 dogs (Canis lupus familiaris). The samples were examined for the presence of Giardia intestinalis by the Direct Fluorescence Assay (DFA) and semi-nested PCR. All amplicons were sequenced on both strands. By DFA, cysts of Giardia spp. were detected in 66 of 297 faecal samples (22.2%). Positive specimens for Giardia spp. were derived from 29.8% of examined pigs, 21.0% of sheep, 18.6% of cattle, 10% of horses, and 19.4% of dogs. Based on the detection of the β-giardin gene by PCR, 39 (13.1%) of the 297 examined samples were recognized as positive. Detection of the presence of Giardia cysts by DFA test was overall significantly higher compared to PCR (p=0.0045). By PCR, Giardia was found in 28.1% of sheep, 11.6% of cattle, 10% of horses, 9.5% of pigs and 5.6% of dogs. Partial β-giardin gene sequences were obtained for 73.7% of the PCR positive samples. From sequenced samples derived from the studied animals, Giardia were identified as assemblage A (8 samples), B (1 sample) and E (18 samples). As assemblages A and B may be zoonotic, the farm animals living in eastern Poland could be regarded as a potential source of Giardia infection for humans. [ABSTRACT FROM AUTHOR]
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- 2015
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90. Toxocara canis in household dogs: prevalence, risk factors and owners' attitude towards deworming.
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Nijsse, R., Ploeger, H., Wagenaar, J., and Mughini-Gras, L.
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TOXOCARA , *DOG parasites , *PET owners , *GASTROINTESTINAL diseases , *LOGISTIC regression analysis , *ATTITUDE (Psychology) , *DISEASE risk factors - Abstract
The prevalence of gastrointestinal parasites and risk factors for shedding of Toxocara eggs were determined for 916 Dutch household dogs older than 6 months. Additionally, the owners answered a questionnaire about their dogs and their attitude towards routine deworming was assessed. Faecal samples were examined using the centrifugal sedimentation flotation method. The overall prevalence of dogs shedding Toxocara eggs was 4.6 %. Multivariable logistic regression analysis revealed that the risk for 1-7-year-old dogs to shed Toxocara eggs was significantly lower (OR 0.38) than that of 6-12-month-old dogs. Compared to dogs walking ≤20 % of the time off-leash, those ranging freely 50-80 % and 80-100 % of the time had a significantly higher risk (OR 10.49 and 13.52, respectively) of shedding Toxocara eggs. Other risk factors were coprophagy (OR 2.44) and recently being kenneled (OR 2.76). Although the applied deworming frequency was not significantly associated with shedding Toxocara eggs, there was a trend towards no shedding in dogs under strict supervision that were dewormed 3-4 times a year. Most dog owners (68 %) recognized 'dog's health' as the main reason for deworming. Only 16 % of dogs were dewormed four times a year. It was concluded that the prevalence of Toxocara egg-shedding household dogs is almost unchanged over recent years and that the knowledge of owners is insufficient to expect sound decisions on routine deworming. [ABSTRACT FROM AUTHOR]
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- 2015
- Full Text
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91. Feed and water intake
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Danesh Mesgaran, Sadjan, Kuhla, Björn, Humphries, David, Weisbjerg, Martin, Lund, Peter, Kennedy, Emer, O'Donovan, Michael, Galvin, Norann, Dijkstra, J., Beaumont, René, Danesh Mesgaran, Sadjan, Kuhla, Björn, Humphries, David, Weisbjerg, Martin, Lund, Peter, Kennedy, Emer, O'Donovan, Michael, Galvin, Norann, Dijkstra, J., and Beaumont, René
- Published
- 2020
92. Probiotic supplementation in systemic nickel allergy syndrome patients: study of its effects on lactic acid bacteria population and on clinical symptoms.
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Randazzo, C.L., Pino, A., Ricciardi, L., Romano, C., Comito, D., Arena, E., Saitta, S., and Caggia, C.
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LACTOBACILLUS reuteri , *PROBIOTICS , *ALLERGIES , *FECES , *MICROBIOLOGY , *POLYMERASE chain reaction , *GEL electrophoresis , *PATIENTS ,PHYSIOLOGICAL effects of nickel - Abstract
Aims The study aimed to evaluate the effects of probiotic Lactobacillus reuteri DSM 17938 strain supplementation in patients suffering from systemic nickel allergy syndrome, in terms of modulation of faecal LAB population linked to a reduction of GI and cutaneous symptoms and to an increase of patient's quality of life. Methods and Results A preliminary double-blind randomized placebo-controlled study was planned and a culture-independent method based on denaturing gradient gel electrophoresis (DGGE) analysis coupled to the 16S rRNA gene sequencing was applied to investigate on the dynamics of faecal LAB communities before and during a low-Ni diet, supplemented with the probiotic strain. Moreover, the severity and the frequency of GI and cutaneous reactions as well as patient's clinical condition perception (VAS scores) were estimated by statistical analysis. PCR- DGGE fingerprinting obtained using LAB-specific primers revealed significant shift in faecal community with an increase in biodiversity in patients supplemented with probiotic Lact. reuteri strain. In addition, GI reactions such as symptoms related to meals and type of stools significantly improved only in patients treated with Lact. reuteri, while severity and frequency of cutaneous symptoms (urticaria, itch and eczema) and recurrent abdominal pain ( RAP) as well as VAS scores statistically decreased in both groups. Conclusions Our preliminary findings suggest that probiotic Lact. reuteri could be a useful supplementation during a low-Ni diet of patients with SNAS, to increase LAB population diversity, which could contribute to restore the intestinal homoeostasis conditions. Significance and Impact of the Study To date, no information is available on probiotics application and on their effects, in terms of intestinal microbiota modulation, on patients suffering from SNAS. Therefore, the identification of dominant LAB community and the study of its shift during the probiotic supplementation could enhance the knowledge of the SNAS syndrome. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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93. A semi-automated magnetic capture probe based DNA extraction and real-time PCR method applied in the Swedish surveillance of Echinococcus multilocularis in red fox (Vulpes vulpes) faecal samples.
- Author
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Isaksson, Mats, Hagström, Åsa, Armua-Fernandez, Maria Teresa, Wahlström, Helene, Olof Ågren, Erik, Miller, Andrea, Holmberg, Anders, Lukacs, Morten, Casulli, Adriano, Deplazes, Peter, and Juremalm, Mikael
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MALARIA , *BIOLOGICAL control of mosquitoes , *RED fox , *FECAL analysis , *FECES , *ANIMAL behavior ,RISK of malaria - Abstract
Background Following the first finding of Echinococcus multilocularis in Sweden in 2011, 2985 red foxes (Vulpes vulpes) were analysed by the segmental sedimentation and counting technique. This is a labour intensive method and requires handling of the whole carcass of the fox, resulting in a costly analysis. In an effort to reduce the cost of labour and sample handling, an alternative method has been developed. The method is sensitive and partially automated for detection of E. multilocularis in faecal samples. The method has been used in the Swedish E. multilocularis monitoring program for 2012-2013 on more than 2000 faecal samples. Methods We describe a new semi-automated magnetic capture probe DNA extraction method and real time hydrolysis probe polymerase chain reaction assay (MC-PCR) for the detection of E. multilocularis DNA in faecal samples from red fox. The diagnostic sensitivity was determined by validating the new method against the sedimentation and counting technique in fox samples collected in Switzerland where E. multilocularis is highly endemic. Results Of 177 foxes analysed by the sedimentation and counting technique, E. multilocularis was detected in 93 animals. Eighty-two (88%, 95% C.I 79.8-93.9) of these were positive in the MC-PCR. In foxes with more than 100 worms, the MC-PCR was positive in 44 out of 46 (95.7%) cases. The two MC-PCR negative samples originated from foxes with only immature E. multilocularis worms. In foxes with 100 worms or less, (n = 47), 38 (80.9%) were positive in the MC-PCR. The diagnostic specificity of the MC-PCR was evaluated using fox scats collected within the Swedish screening. Of 2158 samples analysed, two were positive. This implies that the specificity is at least 99.9% (C.I. =99.7 -100). Conclusions The MC-PCR proved to have a high sensitivity and a very high specificity. The test is partially automated but also possible to perform manually if desired. The test is well suited for nationwide E. multilocularis surveillance programs where sampling of fox scats is done to reduce the costs for sampling and where a test with a high sensitivity and a very high specificity is needed. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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94. Further evaluation of an updated PCR assay for the detection of Schistosoma mansoni DNA in human stool samples
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Luciana I Gomes, Letícia HS Marques, Martin J Enk, Paulo Marcos Z Coelho, and Ana Rabello
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schistosomiasis ,molecular diagnosis ,faecal samples ,polymerase chain reaction ,Microbiology ,QR1-502 ,Infectious and parasitic diseases ,RC109-216 - Abstract
A previously reported sensitive PCR assay for the detection of Schistosoma mansoni DNA was updated and evaluated. Changes in the DNA extraction method, including the use of a worldwide available commercial kit and the inclusion of additional quality control measures, increased the robustness of the test, as confirmed by the analysis of 67 faecal samples from an endemic area in Brazil. The PCR assay is at hand as a proven, reliable diagnostic test for the control of schistosomiasis in specific settings.
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- 2009
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95. Exploring the Gut Microbiome Alteration of the European Hare (Lepus europaeus) after Short-Term Diet Modifications
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Marina Bambi, Renato Fani, Chiara Mengoni, Alberto Masoni, Giacomo Santini, Claudia Greco, Ilaria Greco, Giovanni Bacci, Sara Del Duca, Nadia Mucci, Marco Zaccaroni, and Anna Padula
- Subjects
0301 basic medicine ,hindgut fermenters ,Lepus europaeus ,Firmicutes ,animal diseases ,030106 microbiology ,Zoology ,gut microbiota ,diet modification ,faecal samples ,Gut flora ,Article ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,Taxonomic rank ,lcsh:QH301-705.5 ,General Immunology and Microbiology ,biology ,Phylum ,Bacteroidetes ,Amplicon ,biology.organism_classification ,Hypervariable region ,030104 developmental biology ,lcsh:Biology (General) ,Hindgut fermentation ,sense organs ,General Agricultural and Biological Sciences - Abstract
This study aimed to characterise the gut microbiome composition of European hares (Lepus europaeus) and its potential changes after a short-term diet modification. The high sensitivity of European hare to habitat changes makes this species a good model to analyse possible alterations in gut microbiome after the introduction of additional nourishment into the diet. In total, 20 pairs were chosen for the experiments, 10 pairs formed the control group and were fed with standard fodder. The other 10 pairs represented the experimental group, whose diet was integrated with apples and carrots. The DNA from fresh faecal pellets collected after 4 days from the start of the experiment was extracted and the V3-V4 hypervariable regions were amplified and sequenced using the Illumina MiSeq® platform. The obtained amplicon sequence variants were classified into 735 bacterial genera belonging to 285 families and 36 phyla. The control and the experimental groups appeared to have a homogenous dispersion for the two taxonomic levels analysed with the most abundant phyla represented by Bacteroidetes and Firmicutes. No difference between control and experimental samples was detected, suggesting that the short-term variation in food availability did not alter the hares’ gut microbiome. Further research is needed to estimate significant time threshold.
- Published
- 2021
96. Microsatellite Markers for Bearded Capuchins (Sapajus libidinosus): Transferability and Characterization
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Moraes, BÁLCDE, Borges, DB, Souza-Alves, JÃP, Boubli, JP, and Bezerra, B
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0106 biological sciences ,Cebinae ,molecular markers ,Philippines ,primates ,Science ,Zoology ,Population genetics ,Biology ,010603 evolutionary biology ,01 natural sciences ,Cross-amplification ,Loss of heterozygosity ,03 medical and health sciences ,biology.animal ,Animals ,Cebus capucinus ,Genetic variability ,DNA extraction ,030304 developmental biology ,Fragmentation (reproduction) ,0303 health sciences ,Multidisciplinary ,faecal samples ,Habitat destruction ,Genetic marker ,Microsatellite ,Brazil ,Microsatellite Repeats - Abstract
Natural Sapajus libidinosus populations are in continuous decline due to fragmentation, habitat loss, and the illegal pet trade. They live in Caatinga scrub forests, which already lost over 50% of their original cover. The lack of studies on S. libidinosus population genetics means that we do not know how they are being affected by this striking habitat loss and other anthropogenic disturbances. Polymorphic markers are not available for the study of S. libidinosus diversity and population genetics. Thus, here we aimed to test the transferability of 14 microsatellite markers to S. libidinosus. These microsatellites were previously isolated from Cebus capucinus (white-faced capuchin), species belonging to the same subfamily (Cebinae) as the study species. We found that six of the tested microsatellite markers (tetra-nucleotide) were cross-amplified in our target species. All loci were polymorphic. The number of alleles varied from 4 to 7, and the expected heterozygosity ranged from 0.588 to 0.869. The microsatellite markers transferred to S. libidinosus and characterised in our study will be valuable tools to evaluate the genetic variability of both wild and captive populations. They will considerably reduce the costs of microsatellite isolations, helping to prioritise currently limited research and conservation budgets in Brazil.
- Published
- 2021
97. INSIDE INDUSTRY.
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THREE-dimensional imaging in biology ,MEDICAL laboratory equipment ,FECES ,MICROBIOLOGY ,BUSINESS partnerships - Abstract
A Journey Inside the Human Body Seward Stomacher Enables Clean and Odour Free Sample Preparation for Faecal Transplants. SCIEX and QPS Holdings Enter Collaboration to Establish the BioBA Solution for Bioanalysis of Biologics. Singapore Ranks 4th in How Its National Policies Impact Global Biopharma Innovation, ITIF Finds in New Analysis Marking World Health Day. Bosch Introduces New Generation of Pure Steam Generators and Distillation Units to the Market. Clearbridge BioMedics Partners with the ICR and The Royal Marsden to Demonstrate Label-free Approach in Isolating Heterogeneous Circulating Tumour Cells (CTCs) and PD-L1 Positive CTCs. Treatment Brings New Hope for Patients Suffering From Fatal Lung Disease. (Infographic): About Idiopathic Pulmonary Fibrosis (IPF). [ABSTRACT FROM AUTHOR]
- Published
- 2016
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98. Occurrence and diversity of Eimeria species in cattle in Hamedan province, Iran.
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HEIDARI, H., SADEGHI-DEHKORDI, Z., MOAYEDI, R., and GHAREKHANI, J.
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EIMERIA , *CATTLE as carriers of disease , *PARASITOLOGY , *SYMPTOMS , *INFECTIOUS disease transmission , *DIAGNOSTIC microbiology , *PATHOGENIC microorganisms , *EDUCATION - Abstract
Information on the occurrence, diversity and economic losses due to Eimeria infection on cattle farms is lacking in Western Iran. The principal aim of this study was to determine the prevalence and diversity of Eimeria species in cattle in Hamedan province, Western Iran. In a cross-sectional study performed from June 2010 to April 2013, 400 faecal samples were collected randomly from animals without clinical signs from different cattle farms of Hamedan province and examined for Eimeria species infection using parasitology methods. The overall infection rate of Eimeria species was 8.25%. Nine species of Eimeria were identified including: E. bovis (23.7%), E. zuernii (19.2%), E. canadensis (12.6%), E. ellipsodalis (11.4%), E. alabamensis (10.4%), E. pellita (9.1%), E. auburnensis (6.8%), E. cylindrica (4.6%) and E. bukidnonensis (2.3%). There were statistically significant differences with respect to Eimeria infection and age group (P < 0.0001, OR = 6), although no statistically significant relationships were found for sex (P = 0.35) or faecal consistency (P = 0.587). In conclusion, this study is the first to report the prevalence and diversity of Eimeria species in cattle in Hamedan province. Infection with pathogenic Eimeria spp. was asymptomatic in all animals; this is the reason for the transmission of infection by carriers in this region. Therefore, integrated strategies should be utilised to prevent and control Eimeria spp. infection on cattle farms. [ABSTRACT FROM AUTHOR]
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- 2014
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99. Indigestible neutral detergent fibre in predictions of grass and red clover silage digestibility.
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Krizsan, S. J., Mirzaei Alamouti, H., Rinne, M., and Huhtanen, P.
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GRASS growth , *PLANT fibers , *RED clover , *SILAGE , *PREDICTION theory , *ORGANIC compounds , *LIGNINS - Abstract
The objective of this study was to evaluate the effect of correcting indigestible neutral detergent fibre (i NDF) for the loss of lignin in predictions of silage organic matter digestibility ( OMD). Twenty-five primary and regrowth grass and red clover silages with known in vivo OMD in sheep were used. Silage and faecal samples were analysed by different lignin assays: the Klason method, acid detergent lignin ( ADL) and permanganate lignin. The methods were evaluated by the Lucas test. The slopes in Lucas fits of primary and regrowth grass and red clover silages did not differ, and faecal recovery of ADL was not different from unity. The i NDF was recovered from 288-h in situ incubations in three dairy cows and analysed for ADL. Recovery of ADL in i NDF was 0·562 and 0·801 for grass and red clover silages. Silage concentration of i NDF performed better compared to the different lignin fractions in predicting OMD. Correcting individual samples for loss of ADL as well as using a general correction based on the Lucas fits of ADL in i NDF of grass and red clover silages lowered the prediction error of OMD, but despite losses of ADL in i NDF, the improvements in predictions of OMD were marginal. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
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100. Feed and water intake
- Author
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Danesh Mesgaran, Sadjad, Kuhla, Björn, Humphries, David, Weisbjerg, Martin, Lund, Peter, Kennedy, Emer, O'Donovan, Michael, Liddane, Michelle, Galvin, Norann, Dijkstra, Jan, Baumont, René, Mesgaran, Sadjad Danesh, Baumont, René, Munksgaard, Lene, Humphries, David, Kennedy, Emer, Dijkstra, Jan, Dewherst, Richard, Ferguson, Holly, Terré, Marta, and Kuhla, Björn
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2. Zero hunger ,Animal Nutrition ,feed bin ,0402 animal and dairy science ,markers ,04 agricultural and veterinary sciences ,particle size ,RFID transponder ,Diervoeding ,040401 food science ,040201 dairy & animal science ,pasture ,faecal samples ,n-alkane ,0404 agricultural biotechnology ,Faecal samples ,636 Animal Husbandry ,Ruminants Bovine Cattle ,WIAS ,n-alkanes - Abstract
Knowledge about dry matter intake (DMI) is a very important element in cattle management. Modern, high producing dairy cows require great amount of feed in order to meet the nutrient and energy requirements for maintenance and milk production, particularly during early lactation. In beef animals, current breeding strategies aim to select animals with low residual feed intake. Therefore, individual feed intake evaluation helps to identify the productivity and efficiency of each animal, in relation to the amount of feed being consumed. Additionally, measurement of DMI as precisely as possible is essential for optimizing diet formulation without compromising animal welfare. Various factors at the animal, environmental and dietary level contribute to the level of DMI in an individual. For example, breed, age, parity, body weight, body condition score, stage of lactation, the type and quality of the feed offered, solar radiation, environmental temperature and relative humidity all have an impact on DMI. A recent method of monitoring feed intake involves the use of an electronic system that automatically records feed intake data by measuring the differences of feed in the trough before and after feed consumption. These systems, e.g. Insentec (Maknesse, The Netherlands) or Biocontrol (Rakkestad, Norway), typically use radio frequency identification (RFID) to identify individual cows and monitor individual consumption. An RFID transponder located on the cow, usually in an ear tag or collar, interacts with an RFID reader placed at the feeding area to identify individuals. Additionally, these transponders can allow the operator to record water intake and drinking behaviour of cattle (i.e., frequency and duration of visits to the water trough). Cattle generally consume a large amount of water in comparison to other animals. Several factors, including water quality, feed dry matter, DMI, distance from feed to water, weather conditions, social factors and milk production, all influence the rate of voluntary water intake (VWI) in cattle. Monitoring VWI is crucial for cattle management, as a reduction in VWI will lead to lower feed intake and subsequent production loss in cattle., Chapter of the Living Handbook Methods in cattle physiology and behaviour – Recommendations from the SmartCow consortium
- Published
- 2020
- Full Text
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