Mastitis de Verano en Bovinos Durante la Temporada de Lluvia Venezolana: Reporte de Casos en Yaracal, Estado Falcón

Bovine mastitis is the disease which leads to the greatest economic losses in the dairy industry, most cases are associated with conventional pathogens, and nevertheless, a small number corresponds to infrequent microorganisms that can lead to peculiar clinical manifestations, which veterinarians may not be acquainted with so, implementation of empirical treatments is constrained. Summer mastitis belongs to this group and its etiology is correlated by the coinfection of Peptoniphilus indolicus and Trueperella pyogenes. This is the first report of bovine summer mastitis in Venezuelan herds, in the period ending August 2011 through January 2012, a surplus on rainfall was recorded in Yaracal (the northwestern area from the Country), and two consecutive outbreaks of mastitis in a bovine farm were diagnosed, where T. pyogenes was the causative agent isolated through bacteriological studies in aerobic conditions. This document relates the clinical manifestations and epidemiological risk factors, which were detected on the retrospective analysis in these episodes. Laboratory analyses were developed in the laboratorio de Microbiologia Veterinaria de la Universidad Nacional Experimental “Francisco de Miranda”, Falcon State, macroscopic and microscopic characteristics of isolated strains and its antimicrobial susceptibility profile are described, according to disk diffusion method and previously reported antibiotic assays. The recorded data were highly similar to the previous reports in the literature so, this information could be considered as highly suggestive features, which can guide veterinarians in rural areas, especially on the preliminary diagnosis and therapeutic conducts, which must be confirmed with laboratory assays.