Browsing Ciencias Veterinarias by Title
Now showing items 9-28 of 37
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Effect of the length of the suckling period and dietary energy intake in lactation on the duration of postpartum anestrus in Creole goats.
(Comité editorial Small Ruminant Research, 2016-04-16)The objective of this study was to determine the effect of the length of the suckling period and the dietary energy level on the duration of postpartum anestrus in Creole goats. Twenty-eight multiparous pregnant goats (bodyweight BW 39.9 ± 6.4 kg; mean ± SEM) each bearing a single fetus were used in a 2 suckling period (30 vs. 60 d) × 2 levels of energy intake (low (L) vs. high (H)) factorial design. Kids were separated from their dams 3 d after birth and then suckled twice per day until weaned at 30 or 60 d postpartum. Dams weaned at 30 d postpartum were hand milked for the next 30 d. Goats ... -
EFFECT OF THE REARING SYSTEM ON THE ESTABLISHMENT OF DIFFERENT FUNCTIONAL GROUPS OF MICROORGANISM IN THE RUMEN OF KID GOATS
(Comité editorial Acta Veterinaria-Beograd, 2015-06-23)This study was aimed to determine the effect of the rearing system on the establishment and development of different functional groups of microorganisms in the rumen of kid goats. Fifty kids were fed on goat milk until weaning at 45 (TR, traditional rearing system, n = 25) and 30 days of age (alternative rearing system, AR, n = 25). In addition, only AR group was offered with rumen starter from birth. Both groups consumed alfalfa hay and ground corn between 30 and 90 days of age. Five kids from each group were slaughtered at 21, 30, 45, 70 and 90 days old. It was determined the total number of ... -
Emerging insights into hypothalamic-pituitary- gonadal axis regulation and interaction with stress signalling.
(Comité editorial Journal of Neuroendocrinology, 2018-10-30)Reproduction and fertility are regulated via hormones of the hypothalamic-pituitary-gonadal (HPG) axis. Control of this reproductive axis occurs at all levels, including the brain and pituitary, and allows for the promotion or inhibition of gonadal sex steroid secretion and function. In addition to guiding proper gonadal development and function, gonadal sex steroids also act in negative-and positive-feedback loops to regulate reproductive circuitry in the brain, including kisspeptin neurones, thereby modulating overall HPG axis status. Additional regulation is also provided by sex steroids made ... -
Ensayo de micronúcleos de citoma bucal en trabajadores de fincas frutícolas que han aplicado plaguicidas alrededor de quince años.
(Comité editorial Revista internacional de contaminación ambiental, 2018-02)La aplicación de plaguicidas es una práctica habitual en agricultura. Una alta proporción de estos productos están asociados con la generación de daño genético. Los tipos de plaguicidas, modos de aplicación y cantidad de elementos de protección personal usados varían entre regiones, lo que impide transferir en forma directa, la evidencia de genotoxicidad que se hubiese detectado en los trabajadores de otras zonas geográficas. En esta investigación, se estudió el nivel de daño genético en personas que han aplicado plaguicidas agrícolas en las plantaciones frutales de Mendoza, Argentina, durante ... -
Epidemiological link between canine monocytic ehrlichiosis caused by Ehrlichia canis and the presence of Rhipicephalus sanguineus sensu stricto in Argentina
(Parasitology Research Editorial, 2021-01-08)In this work, we analyze data that support an epidemiological link between cases of canine monocytic ehrlichiosis (CME) by Ehrlichia canis and the presence of Rhipicephalus sanguineus sensu stricto as vector in an endemic area for this tick in Argentina. In a blood sample of a 1-year-old toy poodle with CME compatible clinical signs, which showed CME typical morulae in monocytes in Giemsa-stained blood smear, DNA of E. canis was detected by PCR. Further, DNA of E. canis was also detected in a female of R. sanguineus s.s. collected on the infected dog. Rhipicephalus sanguineus s.s. is the only ... -
Erythrocyte micronucleus cytome assay of 17 wild bird species from the central Monte desert, Argentina.
(Editorial Environmental Science and Pollution Research, 2016-09-29)Birds have the potential to be considered valuable bioindicators of the quality of ecosystems and the environmental impact of pollutants. The aims of this study were to determine the micronuclei frequency and other nuclear abnormalities in erythrocytes by analyzing a wild bird community from central Monte desert (Argentina) and to clarify if there were any differences among certain species. Frequencies of nuclear abnormalities were determined in 73 wild birds belonging to 17 species and two orders (Passeriformes and Columbiformes). A high proportion of individuals, 90.4 and 80.9 %, had erythrocytes ... -
Especies de garrapatas (Acari: Ixodidae) parásitas de perros (Canis familiaris) en zonas urbanas del Gran Mendoza, Argentina.
(Comité editorial Revista FAVE – Sección Ciencias Veterinarias, 2018-06-21)El conocimiento de las especies de ectoparásitos presentes en los animales de compañía tiene implicancias tanto en medicina veterinaria como en salud humana, ya que varios agentes tienen la potencialidad de transmitirse del animal al humano y viceversa. Se revisaron 466 garrapatas remitidas al Centro de Investigación en Parasitología Regional (CIPaR) durante los años 2010 y 2013, recolectadas en 217 perros de zonas urbanas de la provincia de Mendoza. El 83,5% (n=385) fueron identificadas como Rhipicephalus sanguineus sensu lato (84 machos y 199 hembras – relación 1:2,37 –, 65 ninfas y 37 larvas), ... -
Evaluación del nivel de daño en el material genético de niños de la provincia de Córdoba expuestos a plaguicidas.
(Comité editorial Archivos argentinos de pediatría, 2015-04)En las últimas décadas, numerosos autores han investigado acerca de los daños genotóxicos producidos por la exposición a sustancias químicas, aunque no existen para Argentina reportes de estudios que analicen dichos efectos en los niños. El objetivo de este trabajo fue determinar la frecuencia de micronúcleos en células exfoliadas de la mucosa bucal en niños de plantas urbanas con exposición ambiental (por inhalación) y compararla con la frecuencia de micronúcleos en niños que habitan en plantas urbanas alejadas de zonas donde se pulveriza. Población y métodos. Se estudiaron cincuenta niños que ... -
Evaluation of the genotoxic potential of cypermethrin, chlorpyrifos and their subsequent mixture, on cultured bovine lymphocytes
(Comité editorial Chemosphere Journal, 2019-11-09)Cypermethrin (CYP) and chlorpyrifos (CPF) are insecticides/parasiticides used in the production of fruits, vegetables and beef cattle. These substances or their metabolites are frequently reported as residues in food, whose consumption in a diet implies a genotoxic risk. The potential for chronic toxicity of CYP and CPF is unclear, and only a few genotoxicological evaluations based on their mixture have been performed. The aim of this study was to evaluate the genotoxic potential of CYP, CPF and CYP þ CPF in five concentrations, from 5.9 to 175 mg/mL, on bovine lymphocytes. By means of the ... -
Evento de Intoxicación en Perros de Zona Urbana mediante Cebos Contaminados con Aldicarb.
(Comité editor Revista de Investigaciones Veterinarias del Perú, 2017-05-19)El objetivo de esta investigación fue implementar métodos de baja complejidad como la medición de actividad butirilcolinesterasa y cromatografía en capa fina (CCF) para identificar el agente causal de un evento de intoxicación que afectó a 45 perros de una zona urbana de la ciudad de Mendoza, Argentina. Se identificó al plaguicida aldicarb en un cebo que fue extraído de la boca de uno de los perros intoxicados. Aldicarb es un plaguicida carbamato anticolinesterásico de alta toxicidad, baja seguridad al manejo, con efectos ecotoxicológicos y con limitaciones edáficas y de uso en Argentina desde ... -
Frecuencia de micronúcleos en eritrocitos con coloración secuencial Giemsa-naranja de acridina en el gato doméstico.
(Comité editorial Revista de Investigaciones Veterinarias del Perú, 2018-09)Los felinos domésticos comparten el ambiente doméstico con el hombre y tienen condiciones que los hacen especialmente sensibles a compuestos genotóxicos, por lo que son buenos candidatos como bioindicadores en el biomonitoreo de ambientes domésticos. El objetivo del estudio fue aplicar el ensayo de micronúcleos en eritrocitos de gatos domésticos (Felis domesticus) y evaluarlos mediante las coloraciones de Giemsa y naranja de acridina (NA) fluorescente realizada en forma secuencial, para identificar la más adecuada para esta especie. Se aplicó el ensayo de micronúcleos en eritrocitos de sangre ... -
In vivo assessment of closantel ovicidal activity in Fasciola hepatica eggs.
(Editorial Experimental Parasitology, 2016)Anthelmintic resistance in livestock parasites is currently a worldwide problem. Fasciola hepatica is a cosmopolitan parasite which causes considerable loss in sheep and cattle production systems all over the world. Chemotherapy is currently the main tool available for its control. The intensive use of triclabendazole, the drug of choice for more than 20 years, has resulted in the development of resistant strains. The therapeutic options are adulticides such as closantel (salicylanilide anthelmintic that binds extensively to plasma albumin) to treat chronic fascioliasis in sheep, and cattle. In ... -
Infectious bursal disease virus uptake involves macropinocytosis and trafficking to early endosomes in a Rab5-dependent manner
(Comité editorial Cellular Microbiology, 2015-01-07)Infectious bursal disease virus (IBDV) internalization is sparsely known in terms of molecular components of the pathway involved. To describe the cell biological features of IBDV endocytosis, we employed perturbants of endocytic pathways such as pharmacological inhibitors and overexpression of dominant-negative mutants. Internalization analysis was performed quantifying infected cells by immunofluorescence and Western blot detection of the viral protein VP3 at 12 h post-infection reinforced by the analysis of the capsid protein VP2 localization after virus uptake at 1 h post-infection. ... -
Inhibición de butirilcolinesterasa en dos perros intoxicados y confirmación analítica de carbofuran como agente causal
(Comité editorial Revista Veterinaria, Facultad de Ciencias Veterinarias de la Universidad Nacional del Nordeste (UNNE), 2015)La mortandad de animales domésticos y silvestres debido a intoxicaciones por plaguicidas es internacionalmente elevada, en la mayoría de los casos por exposición a insecticidas. Los más comúnmente citados son los anticolinesterásicos organofosforados y carbamatos. Los perros y gatos mascotas son buenos recursos para alertar sobre el uso de venenos en el medio natural y los posibles riesgos para el hombre con el que comparten el ambiente. En dos perros con signos de intoxicación, el objetivo del presente trabajo fue efectuar estudios complementarios de laboratorio para identificar con certeza ... -
Invasive pulmonary aspergillosis in a captive bird Cyanocompsa brissonii (Cardinalidae) in Mendoza, Argentina
(Comité editorial Revista Veterinaria, Facultad de Ciencias Veterinarias de la Universidad Nacional del Nordeste (UNNE), 2015)Se reporta un caso de aspergillosis pulmonar en un ejemplar cautivo de Cyanocompsa brissonii (“reinamora grande”). Las lesiones observadas sugieren la forma infiltrativa o superficial difusa de la enfermedad, típica de las serosas y pulmones. El contagio y posterior muerte del animal podrían haber sido el resultado de una serie de factores que afectaron su inmunidad y predispusieron a la micosis. El organismo encontrado fue identificado como Aspergillus fumigatus, en base a la observación microscópica de conidióforos característicos. Desde el punto de vista epidemiológico, C. brissonii debería ... -
Liver fluke (Fasciola hepatica) naturally infecting introduced European brown hare (Lepus europaeus) in northern Patagonia: phenotype, prevalence and potential risk
(Comité editorial Acta Parasitologica, 2015-06-23)Fascioliasis has recently been included in the WHO list of Neglected Zoonotic Diseases. Besides being a major veterinary health problem, fascioliasis has large underdeveloping effects on the human communities affected. Though scarcely considered in fascioliasis epidemiology, it is well recognized that both native and introduced wildlife species may play a significant role as reservoirs of the disease. The objectives are to study the morphological characteristics of Fasciola hepatica adults and eggs in a population of Lepus europaeus, to assess liver fluke prevalence, and to analyze the potential ... -
Ocurrencia de enfermedades transmitidas por vectores en caninos domésticos de San José, Guaymallén
(Dirección de Investigación, Ciencia y Técnica. Ministerio de Salud. Mendoza, 2015)Boletines de la Dirección de Investigación, Ciencia y Técnica del Ministerio de Salud de Mendoza. Los artículos publicados pertenecen a resultados de proyectos UMaza con subsidio de tal Dirección a través de la convocatoria "Investigadores Mendocinos". Instituciones de los autores: Centro de Investigación en Parasitología Regional (CIPAR), Universidad Juan Agustín Maza; Departamento de Enfermedades Zoonóticas y Vectoriales, Ministerio de Salud, Mendoza; Laboratorio de Biopatología, Universidad Juan Agustín Maza; Laboratorio de Genética, Ambiente y Reproducción (GenAR), Universidad Juan Agustín ... -
Plasma Cholinesterase Activity in Wild Birds from Undisturbed Woodlands in the Central Monte Desert
(2019-04-30)Plasma cholinesterase activity is a biomarker sensitive to the effect of organophosphate and carbamate pesticides, and its enzymatic levels have been previously unknown for most of the wild birds analyzed in the present study. Our objectives were to establish plasma acetylcholinesterase levels in songbirds of 2 undisturbed sites in the central Monte Desert (Argentina). We also examined the influence on cholinesterase activity of age, sex, body condition, feeding and migratory habits, and species. One hundred and sixty‐five wild birds belonging to 26 species were studied. The values obtained for ... -
Potential risks of dietary exposure to chlorpyrifos and cypermethrin from their use in fruit/vegetable crops and beef cattle productions.
(Comité editorial Environ Monitoring and Assessment, 2018-04-18)The active ingredients (a.i.) used as pesticides vary across regions. Diet represents the main source of chronic exposure to these chemicals. The aim of this study was to look at the pesticides applied in fruit, vegetable, and beef cattle productions in Mendoza (Argentina), to identify those that were simultaneously used by the three production systems. Local individuals (n = 160), involved in these productions, were interviewed. Glyphosate was the a.i. most often used by fruit-vegetable producers, and ivermectin by beef cattle producers. Chlorpyrifos (CPF) and cypermethrin (CYP) were the only ... -
Pseudobutyrivibrio xylanivorans adhesion to epithelial cells
(Comité editorial Anaerobe Journal, 2019-01-05)The ruminal bacteria Pseudobutyrivibrio xylanivorans strain 2 (P. xylanivorans 2), that mediates the digestion of plant fiber, is considered an attractive candidate for probiotics. Adherence to the epithelium of the digestive tract of the host is one of the major requirements for probiotics. In this study, we assessed the adhesion of P. xylanivorans 2 to SW480 cells and characterized this process utilizing multiple microscopy approaches. Our results indicate that a multiplicity of infection of 200 CFU/cell allows the highest bacteria to cell binding ratio, with a lower percentage of ...
