Dictiocaulosis en vacas de cría en la provincia de Buenos Aires, Argentina: descripción de dos brotes

Abstract

Dictyocaulosis or parasitic bronchitis is caused by Dictyocaulus viviparus, a direct life cycle nematode, and is most frequently associated with clinical disease in young cattle during their first grazing season. This work describes two outbreaks of dictyocaulosis, in two cow-calf farms in Buenos Aires province, Argentina that caused the death of 13.6 and 15.7% of animals, respectively. In both outbreaks, clinical and pathological findings, and the presence of nematodes in respiratory tract, in some cases only observed in the histopathological analysis, allowed diagnosis confirmation.