RESUMENEl estudio tuvo por objetivo determinar la seroprevalencia del virus de la diarrea viral (VDVB) en bovinos criollos de la provincia de Melgar, Puno. Se obtuvieron muestras de sangre de bovinos (n= 347) machos y hembras mayores a seis meses de edad para la detección de anticuerpos neutralizantes mediante la prueba de neutralización viral. El 48.7 ± 0.1% (166/347) de los animales presentó anticuerpos contra el VDVB. No se detectaron animales portadores del virus. Anticuerpos fueron detectados en animales de todos los distritos con prevalencias entre 15.7 a 94.1%. Los títulos de anticuerpos estuvieron en un rango de 2 a >256, indicando que el VDVB está ampliamente difundido en bovinos de la zona. Las altas prevalencias de anticuerpos evidencian intensa actividad viral; así mismo, los títulos altos indican infecciones recientes y sugieren la existencia de factores que promueven la difusión viral como las ferias ganaderas y la falta de control en el tránsito interno de animales en la zona.Palabras clave : bovinos criollos, virus, diarrea viral bovina, crianza mixta, anticuerpos, neutralización viral ABSTRACTThe prevalence of bovine viral diarrhea virus (BVDV) infection was evaluated in 347 criollo cattle of both sexes and older than 6 months of age in small herds of the province of Melgar, Puno. Serum samples were tested for antibodies against BVDV using the viral neutralization test. The 48.7 ± 0.1% (166/347) of the samples had antibodies against BVDV. Animals carrying on the virus virus were not detected. Antibodies were detected in all sampled herds and the prevalence varied from 15.7 to 94.1%. Antibodies titers varied from 2 to >256, showing that BVDV infection is widespread in the local cattle population, suggesting the presence of factors promoting the viral distribution such livestock fairs and lack of control for animal movements within the region.
The prevalence of bovine herpesvirus type 1 (BHV-1) was determined in 382 bovine older than 6 months of age in herds of the province of Melgar, Puno, Peru. Serum samples were tested for antibodies against BHV-1 using the viral neutralization test. The 29.0 ± 0.1% (110/382) of the samples had antibodies against BHV-1, without differences between young (2 years old) and mature (≥2 years old) animals. Antibody titers varied between 2 to 128. The results indicated that BHV-1 infection is widespread in cattle population of the province of Melgar, Puno, and it is possibly contributing to cause respiratory disease problems in young animals.Key words:bovine, bovine herpes virus type 1, rhinotracheitis infectious bovine, antibodies RESUMENEl presente estudio tuvo por objetivo determinar la prevalencia del virus herpes bovino tipo 1 (VHB-1), agente causal de la rinotraqueitis infecciosa bovina, en animales de la provincia de Melgar, Puno. Se recolectaron muestras de sangre de bovinos mayores a 6 meses de edad (n = 382) provenientes de nueve distritos de la provincia de Melgar, para la detección de anticuerpos contra el VHB-1 mediante la prueba de neutralización viral. La prevalencia del VHB-1 fue de 29.0 ± 0.1% (110/382), sin que hubiese diferencias entre animales jóvenes (<2 años) y adultos (≥2 años). Los títulos de anticuerpos variaron entre 2 a 128. Los resultados indican que el VHB-1 está difundido en los bovinos de la provincia de Melgar y, posiblemente, esté contribuyendo en la presentación de problemas respiratorios en animales jóvenes.Palabras clave:bovino, virus herpes bovino tipo 1, rinotraqueitis infecciosa bovina, anticuerpos
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