11 results on '"AMANTO, F."'
Search Results
2. Fosfomycin concentrations in epithelial lining fluid in weaning piglets
- Author
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SORACI, A. L., PÉREZ, D. S., MARTÍNEZ, G., AMANTO, F., TAPIA, M. O., DIEGUEZ, S., and FERNÁNDEZ PAGGI, M. B.
- Published
- 2012
- Full Text
- View/download PDF
3. Fosfomycin residues in colostrum: Impact on morpho-physiology and microbiology of suckling piglets
- Author
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Fernández Paggi, M. B., primary, Martínez, G., additional, Diéguez, S. N., additional, Pérez Gaudio, D. S., additional, Decundo, J. M., additional, Riccio, M. B., additional, Amanto, F. A., additional, Tapia, M. O., additional, and Soraci, A. L., additional
- Published
- 2018
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4. Fosfomycin concentrations in epithelial lining fluid in weaning piglets
- Author
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Soraci, Alejandro Luis, Pérez, Denisa Soledad, Martínez, Guadalupe, Amanto, F., Tapia, Maria Ofelia, Dieguez, S., and Fernández Paggi, María Belén
- Subjects
WEANING PIGLETS ,CIENCIAS AGRÍCOLAS ,Ciencias Veterinarias ,EPITHELIAL LINING FLUID ,FOSFOMYCIN ,RESPIRATORY PATHOGENS ,BRONCHOALVEOLAR LAVAGE - Abstract
Concentrations of fosfomycin into the epithelial lining fluid (ELF) were studied by bronchoalveolar lavage (BAL) on 6 healthy weaning piglets after the administration of disodium fosfomycin 15 mg/kg intramuscularly (IM). The mean concentrations of fosfomycin in ELF were lower than those in plasma at all sampling time points. Fosfomycin concentrations in ELF were 12.1 % of those in serum. The degree of penetration of fosfomycin into the ELF was determined by comparing the AUC0–8 in ELF with the AUC0–8 in serum. The ratio AUCELF / AUCserum was 0.15 ± 0.02. The Cmax in serum and in ELF were 45.00 ± 2.51 and 3.10 ± 0.95 µg/ml, respectively. These concentrations were achieved at different times (Tmax in serum and ELF: 1.00 ± 0.00 and 2.58 ± 0.49 h, respectively). Effective bacterial killing can be expected from the first antibiotic dosage when the pathogen’s MIC is covered for at least 60–70% of the dosing interval. Different authors have determined a fosfomycin MIC90 for Streptococcus sp (important respiratory pathogens in piglets) of 0.25 µg/ml. Fosfomycin concentrations in ELF remained above the MIC90 value for Streptococcus during more than 8 h post IM administration of 15 mg/kg in weaning piglets. However, additional studies should be carried out in the lungs of infected pigs. Fil: Soraci, Alejandro Luis. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Fisiopatologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Pérez, Denisa Soledad. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Fisiopatologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Martínez, Guadalupe. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Fisiopatologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Amanto, F.. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Producción Animal; Argentina Fil: Tapia, Maria Ofelia. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Fisiopatologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Dieguez, S.. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Fisiopatologia; Argentina Fil: Fernández Paggi, María Belén. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Fisiopatologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
- Published
- 2012
- Full Text
- View/download PDF
5. Study of the distribution of fosfomycin antibiotic in sows colostrum
- Author
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Fernandez Paggi, María Belén, Soraci, Alejandro Luis, and Amanto, F.
- Subjects
fosfomicina ,lechón ,Leche ,colostrum ,Ciencias Veterinarias ,Investigación ,calostro ,microbiota ,piglet ,Porcinos ,fosfomycin - Abstract
El uso de antibióticos (ATB) por vía sistémica en cerdas en producción durante el peri-parto es una práctica frecuente y poco racional, la cual se realiza con el objetivo de “disminuir la carga bacteriana” a la cual van a ser sometidos los lechones neonatos. No existe en la bibliografía estudios sobre la distribución de ATB en calostro o leche de cerda. El objetivo del trabajo fue estudiar la distribución del ATB fosfomicina disódica (FOS) en calostro y leche de cerda. FOS fue analizada por HPLC MS-MS. Las concentraciones de FOS tuvieron un rango máximo y mínimo de 1,60 ± 0,89 y 0,34 ± 0,16 μg/ml respectivamente. El consumo promedio de fosfomicina de la camada fue de 0,27 mg/kg equivalente a 1,35 % de la dosis terapéutica oral de fosfomicina en cerdos. El porcentaje promedio de dosis de fosfomicina eliminada por calostro fue de 1,8 %. Dicho ATB podría ser utilizado en la cerda durante el parto-lactancia con cierta seguridad para el lactante. No obstante, se debería analizar el verdadero impacto de las concentraciones de FOS obtenidas en calostro para determinar los efectos de la droga sobre la implantación de la microbiota intestinal del lechón lactante., The use of antibiotics (ATB) in sows during peripartum is a common practice in commercial pig farms. The aim of this practice is to reduce the bacterial load at which the suckling piglet will be exposed at birth. In the bibliography, there are not any studies on the distribution of fosfomycin in colostrum and milk sow. In this work we focus on the study of the distribution of disodium-fosfomycin antibiotic in colostrum and milk sow. Fosfomycin (FOS) concentrations were analyzed by HPLC MS-MS method. Calostral concentration shows a range of 1.60 ± 0.89 and 0.34 ± 0.16 μg/ml between farrow and 10 h after the birth of the first piglet. The average consumption of litter fosfomycin was 0.27 mg/kg, equivalent to 1.35 % of the oral therapeutic dose in pigs. The percentage of IM dose of fosfomycin eliminated by colostrum was 1.8 %. Also, disodium-fosfomycin could be used during farrow-lactation in the sow with some safety measures for piglet suckling. However, the impact of the concentrations of FOS in colostrum should be analyzed to determine the effects of the drug on the intestinal microbiota implantation of the suckling piglet., Facultad de Ciencias Veterinarias
- Published
- 2012
6. A method for yugular catheterization in weaned piglets
- Author
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Soraci, Alejandro Luis, Amanto, F., Pérez, Denisa Soledad, Martínez, Guadalupe, Dieguez, Susana Nelly, Vega, G., and Tapia, Maria Ofelia
- Subjects
Lechon ,CIENCIAS AGRÍCOLAS ,Ciencias Veterinarias ,Cateterismo ,purl.org/becyt/ford/4.3 [https] ,Toma de Muestra ,purl.org/becyt/ford/4 [https] - Abstract
Las técnicas convencionales para la extracción de sangre desde la vena yugular externa en cerdos no son adaptables a muestreos sanguíneos intensivos y repetitivos, ya que las maniobras de sujeción conducen a estrés en el animal, obteniéndose muestras hemolizadas y resultados erróneos. Aunque existen técnicas no quirúrgicas para la toma de sangre en cerdas, éstas no son fáciles de realizar en lechones de destete. Para este estudio se utilizaron doce lechones que fueron sedados, previo ayuno, para reducir el estrés durante la sujeción. Posteriormente, fueron colocados en decúbito dorsal sobre una tabla de madera en forma de V. Luego de desinfectar el cuello, se realizó una incisión en piel y subcutáneo con exposición de la vena yugular externa y seccionado de la misma para la introducción de una sonda nasogástrica desde la cual se tomaron muestras de sangre a tiempo y volumen fijo. Se obtuvieron plasmas no hemolizados que no interfirieron en los resultados de laboratorio. Durante y posteriormente al ensayo se evaluó el estado de salud, peso y consumo de los animales, sin observarse indicadores de estrés. La técnica propuesta demostró ser útil en muestreos repetitivos de sangre por tratarse de un método simple, rápido, económico, realizable a campo y en ausencia de manipuleo y sujeción que conducen al estrés. Conventional techniques for blood extraction from the external yugular vein in pigs are not adaptable to intensive and repetitive blood samplings because of the stress caused by the immobilization procedures, which lead to the obtention of hemolized samples and erroneus results. Although non surgical techniques for blood extraction exist, they are not easy to apply to weaning piglets. In this study, twelve piglets, which were sedated previous fasting to reduce the stress of immobilization, were used. Them, they were placed on a V wooden table in dorsal decubitus position. After neck desinfection, an incision involving the skin and subcutaneus tissue was performed to expose the external yugular vein. Then, the vein was cut off to introduce a nasogastric catheter for blood extractions at fixed times and volumes. Non hemolyzed plasma samples, which did not interfere with the laboratory tests, were obtained. Animal health state, weight and feed intake were evaluated during and after the experiment, and stress indicators were not detected. The proposed technique showed to be useful for repetitive blood samplings, since it is simple, fast, economical, feasable to use in the farm and it does not cause stress due to handling and immobilization. Fil: Tapia, Maria Ofelia.
- Published
- 2010
7. Strategic use of additives: impact ongastro-intestinal equilibrium-health in piglets
- Author
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Soraci, Alejandro Luis, Amanto, F., Harkes, R., Pérez, D. S., Martínez, Guadalupe, Diéguez, Susana Nelly, and Tapia, M. O.
- Subjects
salud gastrointestinal ,lechón ,aditivos ,Aditivos Alimentarios ,gastrointestinal health ,piglets ,additives ,Ciencias Veterinarias ,Sistema Digestivo ,Porcinos - Abstract
Durante mucho tiempo se pensó que el rol del intestino se limitaba solamente a la digestión de los alimentos y a la absorción de nutrientes. Numerosos trabajos de investigación han demostrado la contribución del intestino al plano metabólico e inmunológico general del animal En consecuencia, suministrar un alimento de excelente calidad, balanceado en su composición para una categoría de animal determinada, no garantiza el buen desarrollo de parámetros zootécnicos. El tubo digestivo debe encontrarse en condiciones fisiológicas óptimas para metabolizar los nutrientes aportados, como así también afrontar la continua e importante entrada de antígenos orales. El correcto equilibrio de las funciones intestinales representa la clave para el logro de una buena "perfomance" productiva. Los aditivos son incorporados a los alimentos con el objetivo de prevenir y/o tratar diferentes situaciones fisiopatológicas que atentan contra la salud y equilibrio gastrointestinal. El conocimiento de las acciones y efectos de los aditivos es esencial para el uso racional de los mismos., For a long time, it was considered that the role of the intestine was limited to food digestion and absorption of nutrients. Numerous scientific works have demonstrated the intestine contribution to the overall metabolic and immunological status of the animal. Administering a well-balanced excellent-quality diet for an animal's category does not guarantee a good development of zootechnic parameters. The digestive tube must be under optimal physiological conditions in order to metabolize the administered nutrients as well as to face the continuous and important income of oral antigens. The proper balance of the intestinal functions represents the key to achieve a good productive performance. Additives are incorporated to feed with the purpose of preventing and/or treating different physio-pathological conditions that adversely affect the gastro-intestinal equilibrium and health. The knowledge of additive's actions and effects is essential for the rational use of them., Facultad de Ciencias Veterinarias
- Published
- 2010
8. Fosfomycin concentrations in epithelial lining fluid in weaning piglets
- Author
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SORACI, A. L., primary, PÉREZ, D. S., additional, MARTÍNEZ, G., additional, AMANTO, F., additional, TAPIA, M. O., additional, DIEGUEZ, S., additional, and FERNÁNDEZ PAGGI, M. B., additional
- Published
- 2011
- Full Text
- View/download PDF
9. Practical oxygen therapy for newborn piglets.
- Author
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Soraci AL, Decundo JM, Dieguez SN, Martinez G, Romanelli A, Perez Gaudio DS, Fernandez Paggi MB, and Amanto FA
- Subjects
- Animals, Asphyxia therapy, Blood Glucose analysis, Female, Oxygen therapeutic use, Oxygen Inhalation Therapy methods, Pregnancy, Swine, Treatment Outcome, Animals, Newborn, Asphyxia veterinary, Oxygen Inhalation Therapy veterinary, Swine Diseases therapy
- Abstract
Aims: To evaluate the effect of a novel method of practical oxygen therapy on physiological parameters related to survival, weaning weight and preweaning mortality of neonatal piglets under commercial farm conditions. Methods: Piglets from hyperprolific sows born with signs of asphyxia, (n = 109; <6 on a score of respiration, meconium staining and activity) or very low birth weight (VLBW; n = 112; <1.05 kg) were selected for the study. Approximately half of each group (n = 55 VLBW piglets and n = 57 piglets with asphyxia) received 100% oxygen immediately after birth using a specially designed facemask for 45 seconds (VLBW) or 1 minute (asphyxiated). Physiological parameters (peripheral blood oxygen saturation (SpO
2 ) blood glucose concentration and rectal temperature) were measured before oxygen treatment 5 minutes after birth (SpO2 ) and 24 hours later (SpO2 , blood glucose concentration, temperature). Weight at birth, at 24 hours and at 21 days of age, preweaning mortality, and estimated colostrum intake were also recorded. Results: A significant treatment effect on SpO2 was observed (p = 0.013 and p < 0.001 for VLBW and asphyxiated piglets respectively). VLBW and asphyxiated piglets that received oxygen treatment had higher SpO2 after treatment (measured 5 minutes after birth, 97.7 and 97.8% respectively) compared to immediately after birth (93.3 and 86.8% respectively) while untreated piglets showed no variation. Blood glucose concentrations increased in all piglets between birth and 24 hours of age (p = 0.003 and p < 0.001 for asphyxiated and VLBW piglets respectively) and this was higher in asphyxiated piglets that received oxygen than those that did not (5.6 (SE 0.2) mmol/L; p < 0.05). Estimated colostrum intake was higher in asphyxiated (401.6 (SD 24.4) g/kg) and VLBW (374.9 (SE 23.4 g/kg) piglets that received oxygen than those that did not (273.2 (SE 24.1) g/kg; p < 0.001 and 249.0 (SE 22.5) g/kg; p < 0.001 respectively). Similarly weight at weaning was higher in asphyxiated (5.8 (SE 0.2) kg) and VLBW (4.9 (SE 0.2) kg) piglets that received oxygen therapy than control animals (4.9 (SE 0.2) kg; = 0.005 and 4.1 (SE 0.2) kg; p = 0.008 respectively). Furthermore, oxygen treatment markedly reduced preweaning mortality from 9/52 (17%) untreated to 1/57 (1.7%) oxygen-treated piglets suffering asphyxia at birth (p = 0.006). Conclusions: Oxygen therapy improves physiological and productive parameters in piglets born with signs of asphyxia or VLBW. The incorporation of this strategy as part of the farrowing routine enhances the advantages of rearing hyperprolific sows.- Published
- 2020
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10. Exposure variability of fosfomycin administered to pigs in food or water: impact of social rank.
- Author
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Soraci AL, Amanto F, Tapia MO, de la Torre E, and Toutain PL
- Subjects
- Animals, Anti-Bacterial Agents administration & dosage, Area Under Curve, Argentina, Drinking physiology, Eating physiology, Eating psychology, Feeding Behavior psychology, Female, Fosfomycin administration & dosage, Fosfomycin blood, Male, Regression Analysis, Swine psychology, Video Recording, Anti-Bacterial Agents pharmacokinetics, Drinking Behavior physiology, Feeding Behavior physiology, Fosfomycin pharmacokinetics, Social Dominance, Swine metabolism
- Abstract
The objective of this study was to document the effect of social ranking on the internal exposure of pigs to an antibiotic (fosfomycin) administered either in food or in drinking water. Signs of aggression were recorded at the feeder and drinker. The interindividual variability explained by the social rank was even greater when the test antibiotic was given in food despite the fact that the water consumption was less variable than the food intake. The range of plasma concentrations after administration of fosfomycin either in food or drinking water leads to a number of pigs in the treated group being exposed to rather low and highly variable concentrations of fosfomycin and not able to maintain adequate plasma concentrations above the typical minimum inhibitory concentration (MIC). Social rank clearly influences the level of exposure of pigs to fosfomycin both in food and drinking. However, its administration in drinking water is likely to be the best option to optimize antibiotic efficacy., (Copyright © 2013. Published by Elsevier Ltd.)
- Published
- 2014
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11. Detection of Integrase Gene in E. coli Isolated from Pigs at Different Stages of Production System.
- Author
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de la Torre E, Colello R, Padola NL, Etcheverría A, Rodríguez E, Amanto F, Tapia MO, and Soraci AL
- Abstract
Integrons are one of the genetic elements involved in the acquisition of antibiotic resistance. The aim of the present research is to investigate the presence of integrons in commensal Escherichia coli (E. coli) strains, isolated from pigs at different stages of production system and from the environment in an Argentinian farm. Five sows postpartum and five randomly chosen piglets from each litter were sampled by rectal swabs. They were sampled again at day 21 and at day 70. Environmental samples from the farm were also obtained. E. coli containing any integron class or combination of both integrons was detected by polymerase chain reaction in 100% of sows and in piglets at different stages of production: farrowing pen stage 68.1%;, weaning 60%, and growing/finishing 85.8%, showing an increase along the production system. From environmental samples 78.4% of E. coli containing any integron class was detected. We conclude that animals and farm environment can act as reservoirs for potential spread of resistant bacteria by means of mobile genetic elements as integrons, which has a major impact on production of food animals and that can reach man through the food chain, constituting a problem for public health.
- Published
- 2014
- Full Text
- View/download PDF
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