Temas
Mostrando ítems 1-20 de 28
-
Asociación entre inmunidad pasiva y mortalidad en terneros
(Universidad de Buenos Aires, 2018-06)La mortalidad en la cría y recría de terneras de remplazo es un factor crítico para la sustentabilidad y el progreso genético en rodeos lecheros. Varios factores de riesgo se han asociado a la muerte de los animales en las ... -
Bovine colostral cells—the often forgotten component of colostrum
(American Veterinary Medical Association, 2017-05)At birth, neonatal calves have all the essential immune components they need as adult cattle; however, it takes at least 2 to 4 weeks for those components to become fully functional.1,2 The immune system does not become ... -
Bovine leukemia virus infection in neonatal calves. Risk factors and control measures
(Frontiers Media, 2018-10)Bovine leukemia virus (BLV) is the causative agent of enzootic bovine leukosis (EBL). Although efficient eradication programs have been successfully implemented in most European countries and Oceania, BLV infection rates ... -
Changes in hematological, biochemical, and blood gases prameters in response to progressive inclusion of nitrate in the diet of Holstein calves
(Veterinary World Publisher, 2021-01)Background and Aim: Nitrate (NO3-) reduces enteric methane emissions and could be a source of non-protein nitrogen in ruminant feeds. Nonetheless, it has a potential toxic effect that could compromise animal health and ... -
Comparación de métodos de extracción de ADN para mejorar el diagnóstico molecular de Cryptosporidium sp. en materia fecal de terneros = Comparison of DNA extraction methods to improve the molecular diagnosis of Cryptosporidium spp. from fecal samples of calves
(Universidad de Morón, 2019-07)Cryptosporidium sp. es un parásito, protozoo que infecta a una gran variedad de hospedadores vertebrados. Entre las más de 30 especies validadas en el género, la especie zoonótica Cryptosporidium parvum es la principal ... -
Dinámica de la infección de terneros con Cryptosporidium parvum
(Universidad de Morón, 2017-10)Cryptosporidium sp. es un protozoo parásito que infecta a una gran variedad de vertebrados hospedadores. La especie C. parvum es el principal agente etiológico de la criptosporidiosis y representa una de las principales ... -
Diseminación de ooquistes de Criptosporidium spp. entre los 7 y 13 días de edad en terneros de un rodeo lechero
(Universidad de Buenos Aires, 2022-06)La criptosporidiosis es una enfermedad parasitaria zoonótica cosmopolita causada por protozoos del género Cryptosporidium. La principal especie reportada en terneros neonatos es Cryptosporidium parvum. El objetivo de este ... -
Dynamics of perinatal bovine leukemia virus infection
(BioMed Central, 2014)Bovine leukemia virus (BLV) is highly endemic in many countries, including Argentina. As prevention of the spread from infected animals is of primary importance in breaking the cycle of BLV transmission, it is important ... -
Dynamics of the ruminal microbial ecosystem, and inhibition of methanogenesis and propiogenesis in response to nitrate feeding to Holstein calves
(Elsevier, 2021-12)It is known that nitrate inhibits ruminal methanogenesis, mainly through competition with hydrogenotrophic methanogens for available hydrogen (H2) and also through toxic effects on the methanogens. However, there is limited ... -
Efficacy of a recombinant Intimin, EspB and Shiga toxin 2B vaccine in calves experimentally challenged with Escherichia coli O157:H7
(Elsevier, 2018-06)Escherichia coli O157:H7 is a zoonotic pathogen of global importance and the serotype of Shiga toxin-producing E. coli (STEC) most frequently associated with Hemolytic Uremic Syndrome (HUS) in humans. The main STEC reservoir ... -
Efficacy of prepartum vaccination against neonatal calf diarrhea in Nelore dams as a prevention measure
(BioMed Central, 2022-08)Background: Neonatal calf diarrhea (NCD) is the leading cause of calf morbidity and mortality in beef cattle. Cow’s vaccination in last stage of pregnancy is one of the most important measures to mitigate the risk of NCD ... -
Estudio del efecto del uso de anticuerpos específicos contra el virus de la leucosis bovina como suplemento dietario en terneros
(Facultad de Ciencias Veterinarias, Universidad de Buenos Aires., 2018)En este trabajo se estudió el efecto del uso de anticuerpos de yema de huevo (IgY) anti BLV específicos como suplemento en la leche de consumo de terneros durante todo el período de cría, monitoreando a los animales desde ... -
Heterogeneity in the antibody response to foot‐and‐mouth disease primo‐vaccinated calves
(2015-06)Foot‐and‐mouth disease (FMD) vaccines are routinely used as effective control tools in large regions worldwide and to limit outbreaks during epidemics. Vaccine‐induced protection in cattle has been largely correlated with ... -
Immune cells transferred by colostrum do not influence the immune responses to foot-and-mouth disease primary vaccination
(Elsevier, 2019-09)Little is known about the influence of maternal antibodies and immune cells transferred through colostrum on the immune responses of calves to the currently used foot-and-mouth disease (FMD) vaccines. Here we evaluated the ... -
Immune response in calves vaccinated with type three secretion system antigens and shiga toxin 2B subunit of Escherichia coli O157:H7
(2017-01-03)Ruminants are the primary reservoir of Shiga-toxin producing Escherichia coli (STEC) O157:H7 and the main source of infection for humans. The aim of this study was to assess the immunogenic properties of a candidate vaccine ... -
In vitro and in vivo characterization of a typical and a high pathogenic bovine viral diarrhea virus type ii strains
(Frontiers Media, 2018-04)Non-cytopathic (ncp) type 2 bovine viral diarrhea virus (BVDV-2) is widely prevalent in Argentina causing high mortality rates in cattle herds. In this study, we characterized an Argentinean ncp BVDV-2 field isolate (98-124) ... -
Influence of antibodies transferred by colostrum in the immune responses of calves to current foot-and-mouth disease vaccines
(2014-11-12)Immunity to currently used oil-adjuvanted inactivated vaccines against foot-and-mouth disease virus (FMDV) has been studied in detail in adult animals; however, the influence of maternally derived antibodies transferred ... -
Mastitis tuberculosa en bovinos de leche : reporte de casos
(Asosiación Argentina de Veterinarios de Laboratorios de Díagnóstico, 2018-11)La tuberculosis bovina (TB) es una enfermedad del ganado producida principalmente, por Mycobacterium bovis (M. bovis). Aunque es conocido el riesgo de infección en terneros asociados al manejo del calostro y leche (Evangelista ... -
Molecular characterization of Cryptosporidium isolates from calves in Argentina
(2013-12)Cryptosporidiosis is responsible for significant fatalities of neonatal calves, resulting in substantial economic loss in dairy farming in several countries. Additionally, the high shedding of environmentally resistant ... -
Morbilidad y mortalidad en terneras de rodeos lecheros con manejo intensivo del calostrado
(Asosiación Argentina de Veterinarios de Laboratorios de Díagnóstico, 2021-11)La producción lechera en Argentina ha registrado durante los últimos años una reducción en el número de tambos y del número de vacas a una tasa del 3,4% y 1.4% anual, respectivamente (OCLA, 2018). La ineficiencia reproductiva ...