The specificity and sensitivity of the fluorescent antibody test for Mycobacterium johnei infection in abattoir and culled cattle.
In a series of 100 cattle in which there was no bacteriological or histopathological evidence of Mycobacterium johnei infection there were four positive reactions to the fluorescent antibody (FA) test with M johnei antigen and 20 to the complement fixation (CF) test. In a second series of 118 culled adult cattle M johnei infection was found in 26. The FA test was positive in 16 and the CF in 12 of those infected cattle. In 92 cattle with no evidence of M johnei infection the FA test was positive in seven and the CF test in 22.
D000003:Abattoirs; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000473:pathology; D005455:Fluorescent Antibody Technique; D007421:Intestine, Small / Q000473:pathology; D010283:Paratuberculosis / Q000175:diagnosis* / Q000276:immunology / Q000473:pathology