1990 Volume 43 Issue 10 Pages 713-718
Feces of 23 cattle with wartery or muco-hemorragic diarrhoea from 3 dairy and 1 beef farms were examined bacteriologically and virologically, and their sera were tested serologically. As a result, 103 to 105 CFU/g of feces of Campylobacter fetus subsp. fetus (C. f fetus) were isolated from7 cattle on 4 farms. Enterotixigenic Escherihia coli, Salmonell spp., and Clostridium perfringens were not isolated from thesespecimens. There were some cattle on 2 dairy farms which showed significant variationsof serum agglutination titer against C. f. fetus, five weeks after the onset. Cattle on 2 of 3 dairy farms also had a significant increase of haemagglutination inhibition titer to bovine coronavirus. From 2 of 3 beef cattle with diarrhoea, C. jejuni and C. coli were also isolated besides C. f. fetus. On the other hand, C. f fetus was not isolated from the rectal feces of 50 normal cattle on 12 dairy farms.
