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The aim of this study was to evaluate the effects of replacing antibiotics with increasing doses of chitosan (CHI) on nutrient intake and digestibility, corn grain excretion, ruminal fermentation, nitrogen metabolism, and feeding behavior in finishing steers fed forage-free diets. Five ruminally cannulated crossbred steers were assigned to a 5 x 5 Latin square experimental design and given the following diets: C0= basal diet with no additives, ANT= basal diet with inclusion of virginiamycin 30 mg/kg DM, C375= basal diet with inclusion of chitosan 375 mg/kg DM, C750= basal diet with inclusion of chitosan 750 mg/kg DM, and C1500= basal diet with inclusion of chitosan 1500 mg/kg DM. Supplementation with CHI did not affect ruminal pH and ammonia nitrogen (N-NH3) concentration. Chitosan quadratically affected corn grain excretion and molar proportion of ruminal butyrate, with greater values for C750. Animals fed C375 showed greater dry matter intake and neutral detergent fiber intake; and greater digestibility of DM, starch, and NDF. Animals fed C750 and C1500 diets presented greater absorbed N compared to ANT. Animals fed ANT, C750, and C1500 spent more time eating and chewing than animals fed CON. More specifically, the dose of 375 mg/kg DM of diet was very promising for steers fed free-forage diet due to its ability to improve nutrient digestibility, with only slight changes in N metabolism.

Despite recent efforts to search for biomarkers for the pre-symptomatic diagnosis of Parkinson’s disease (PD), the presence of risk factors, prodromal signs, and family history still support the classification of individuals at risk for this disease. Human epidemiological studies are useful in this search but fail to provide causality. The study of well-known risk factors for PD in animal models can help elucidate mechanisms related to the disease’s etiology and contribute to future prevention or treatment approaches. This narrative review aims to discuss animal studies that investigated four of the main risk factors and/or prodromal signs related to PD: advanced age, male sex, sleep alterations, and depression. Different databases were used to search the studies, which were included based on their relevance to the topic. Although still in a reduced number, such studies are of great relevance in the search for evidence that leads to a possible early diagnosis and improvements in methods of prevention and treatment.

Despite its secondary role to the regional economy, the dairy industry has an important social function, mainly to local family farms in the state of Mato Grosso. Unfortunately, regional milk production has been declining in the last decade, and dairy industries are facing difficulties to maintain production over the year, with an idle capacity of around 50% in some regions of Mato Grosso. This study aimed to identify the state pattern of milk yield and seasonal variation in price, analyzing the dynamics of the variables through descriptive and basic statistics. Authors calculated seasonal indexes using moving average in different periods: i) production from 1997 to 2018, and price and production from 2011 to 2018. Our findings indicate that the seasonality of milk yield in Mato Grosso over 1997 – 2018 spins around 41%, versus 44% from 2011 to 2018. In the same period, the Brazilian indexes reached 20%. In contrast, price seasonality is higher in Brazil (14%) than in Mato Grosso (11%). Considering the price index, we can point out two distinct periods: i) lower payment policy (January to March); ii) higher payment policy (July to September), with peaks in August and February. Regard the price index, the same behavior was seen in Brazil. In conclusion, the seasonality of raw milk production is higher in Mato Grosso concerning the national mean. That oscillation in the supply compromises the processing capacity of regional dairy industries, impacting the price paid to the farmers, reducing dairies production and commercialization.

The use of mobile shelters to raise calves has been a practical alternative to farmers, taking into account their importance in reducing the spread of diseases as well as thermal stress. Despite the fact that individual shelters are widely employed in the country, there is little information on the thermal efficiency of materials that are normally used to build them (Barnabé et al, 2014), as well as the high cost involved in their construction. The aim of this study was to evaluate the following variables: temperature, relative humidity and temperature-humidity index (THI), and the cost-benefit ratio of the recyclable materials used to cover the shelters. Bottle PET (T2), tires (T3), milk packaging (Tetrapack™) (T4) and one sensor as baseline left in full sun. During a 40 days period, the temperature and relative humidity data were recorded hourly, to obtain daily averages. There was no statistical difference (p> 0.05) between materials related to temperature, relative humidity and ITU averages. Even the critical temperature and humidity do not presented significant variation between the treatments (p> 0.05). Considering the results, there is no significant differences among the materials used related to the thermal efficiency based on the above mentioned variables . Therefore, it can be concluded that thereplacement of the conventional roof (Eternit®) by these alternative materials becomes feasible, based on the lower costs and the ecological appeal for recycle materials.

Logo do cabeçalho da página SCIENTIFIC ELECTRONIC ARCHIVES OPEN JOURNAL SYSTEMS Ajuda do sistema USUÁRIO Logado como: berber Perfil Sair do sistema NOTIFICAÇÕES Visualizar (115 nova(s)) Gerenciar IDIOMA Selecione o idiomaSubmeter CONTEÚDO DA REVISTA Pesquisa Escopo da Busca Pesquisar Procurar Por Edição Por Autor Por título TAMANHO DE FONTE Make font size smallerMake font size defaultMake font size larger INFORMAÇÕES Para leitores Para Autores Para Bibliotecários CAPA SOBRE PÁGINA DO USUÁRIO PESQUISA ATUAL ANTERIORES NOTÍCIAS Capa > v. 10, n. 4 (2017) > Lopes CARD TEST AND POLYMERASE CHAIN REACTION FOR THE DIAGNOSIS OF BOVINE BRUCELLOSIS IN CULLED ANIMALS IN A SLAUGHTERHOUSE AT MATO GROSSO L. B. Lopes, C. Eckstein, V. S. Moustacas, M. F. d’Ornellas, H. L. S. Ponce RESUMO Brucellosis is a zoonotic infectious disease is a chronic condition caused by bacteria of the genus Brucella, which affect animals and man. The disease has become endemic in Brazil, resulting in economic losses both from the point of view of beef production and public health. This study aims to demonstrate the occurrence of animal reagents based on card test (CT), comparing the results with the occurrence of gross lesions at post - slaughter and identification of bacterial DNA by the technique of chain reaction by (PCR). Blood samples were obtained immediately after animals stunning were also collected and the lymph nodes in the slaughter lines. Associated with the collection of material for laboratory diagnosis, made up the inspection for macroscopic lesions, following the routine of the Federal Inspection Service (SIF) of the cattle slaughterhouse located in the municipality of Colíder/MT. In total, 622 blood samples were collected, 14.3% were positive according to the test of CT. According to Kappa test, there is a poor correlation entity tests. Based on the McNemar test, the occurrence of the results is significantly different between the two tests.

Bovine leptospirosis has often been studied in several Brazilian States due to its importance itself and high herd prevalence. Using the microscopic agglutination test (MAT), we sought to determine the frequency of leptospiral agglutinins in sera of cows slaughtered between June and September 2013 in slaughterhouse located in Colíder, northern of Mato Grosso. There were examined 246 to 256 samples according to the availability of serum for all 20 serovars tested. According to the MAT, altogether 102 samples were classified as negative besides 297 positive reactions, as follows: 71 animals reagents only to 1 sorovar and 83 for 2 or more serovars of Leptospira spp. The frequency of positive reactions to sorovar Lagoa was the highest among serovars with 101 occurrences, representing 34% of the total of 297; followed by Bolivia (n = 87, 29.3%) and Australis (n = 30, 10.1%) serovars. In terms of frequency, the 101 positive animals identified by SAM represent 39.8% of the total of 254 animals tested for serovar Lagoa; followed by serovar Bolivia with 35.4% of positivity in 246 sera tested. For serovars Celledoni, Hebdomadis, Norma, Shermani and Szwajizak, no positive reactions were found. .

Ticks are responsible for high economic and production losses on cattle production, and the use of acaricides is the main form of control applied. In recent decades, the resistance of ticks to acaricides was exacerbated by incorrect use of products, compromising the effectiveness of treatments. This study aimed to determine in vitro effectiveness of commercial acaricides in six populations of Rhipicephalus (Boophilus) microplus in northern region of Mato Grosso. On average 100 engorged females were collected from each herd, which were selected and separated into homogeneous groups, sanitized, and immersed to acaricide diluted according to the manufacturer's statement, on sequence there was incubated. After the incubation was obtained from female reproductive efficiency and effectiveness of the tested acaricides. The association cypermethrin+ chlorpyrifos + citronellal showed satisfactory efficiency (> 95%) in all the properties (mean 99.86% in properties), followed by trichlorfon (83.45%), amitraz (72.33%), neem oil (67.23%) and cypermethrin (22.97%), which was not effective in any property. It indicates the use of the association cypermethrin +chlorpyrifos+ citronellal on evaluated properties for control of cattle tick effectively.

Ticks are responsible for high economic and production losses on cattle production, and the use of acaricides is the main form of control applied. In recent decades, the resistance of ticks to acaricides was exacerbated by incorrect use of products, compromising the effectiveness of treatments. This study aimed to determine in vitro effectiveness of commercial acaricides in six populations of Rhipicephalus (Boophilus) microplus in northern region of Mato Grosso. On average 100 engorged females were collected from each herd, which were selected and separated into homogeneous groups, sanitized, and immersed to acaricide diluted according to the manufacturer's statement, on sequence there was incubated. After the incubation was obtained from female reproductive efficiency and effectiveness of the tested acaricides. The association cypermethrin+ chlorpyrifos + citronellal showed satisfactory efficiency (> 95%) in all the properties (mean 99.86% in properties), followed by trichlorfon (83.45%), amitraz (72.33%), neem oil (67.23%) and cypermethrin (22.97%), which was not effective in any property. It indicates the use of the association cypermethrin +chlorpyrifos+ citronellal on evaluated properties for control of cattle tick effectively.