Frequencia de patogenos na pele e meatos de tetas de bovinos [glandula mamaria, exame bacteriologico, mamite, diagnostico, bacteria, Minas Gerais, Brasil] Parte de tese
[Pathogen frequence in the skin and galactophorus ducts of cows teats [mammary gland, bacteriological examination, mastitis, diagnosis, bacterium, Minas Gerais, Brazil]] [Part of thesis]