Ramos, A. de A. Guida, H.G. Andrade, V.L.B. Comparacao de tres tecnicas de coleta de amostra de material prepucial para diagnostico da campilobacteriose [bovino] Comparison of three techniques for collecting preputial samples for the diagnosis of campylobacteriosis Subjects--Topical Terms: BOVINOCAMPILOBACTERIOSEDIAGNOSTICOABORTO