Patógenos associados à mastite bovina em rebanhos leiteiros na região sul do Brasil

Abstract

In this work, through microbiological examinations, the etiology of bovine mastitisin 628 milk samples coming from dairy farms from Paraná, Santa Catarina and Rio Grande do Sulalong the year of 2007 were evaluated. Out of this total 1,382 microorganisms were isolated. Bytaking into account the total of isolations, the following microorganisms and their percentage,respectively were found: Staphylococcus spp. (30.53%), Escherichia coli (21.64%), Streptococcus bovis(17.08%), Streptococcus agalactiae (11.07%), Enterobacter spp. (7.53%), Pseudomonas spp. (4.12%) andothers (8.03%). The microorganisms grouped into the others are: Streptococcus spp., Proteus spp.,gram negative rods, Shigella spp., Alcaligenes spp., Klebsiella spp., Edwarsiella spp., Citrobacter spp.,Serratia spp., Salmonella spp. e Corynebacterium spp. The environmental pathogens predominatedamong the isolated microorganisms; 33.13% of the cultures presented more than three pathogens,suggesting contamination of the samples; in the mounts of November and December, there wasan increase of the samples sent.