Abstract:
Bovine paratuberculosis is an infectious and contagious chronic disease due to the increase of the mycobacterium M paratuberculosis in the organism. This disease is widespread in all countries practicing intensive cattle raising and causes heavy economic losses.
The objective of this study is to search for paratuberculosis in cattle slaughterhouses. The author begins by presenting anatomical and histological reminders of the intestine and the satellite lymph; the major epidemiological elements of the causative pathogen, the symptoms and lesions of paratuberculosis plus the different methods of diagnosis and screening are described.
The practical part consists of visits to the slaughterhouse, to inspect the intestines, take samples from the mesenteric hypertrophied lymph, accompanied by a portion of the intestine, and send them to the laboratory for histopathological study.
Two stains were made, the HE and cold Ziehl stain; impressions of intestines and mesenteric lymph are also colored by the Ziehl-Neelsen hot method and examined microscopically.
