Risk factors for bovine Johne's disease in NSW North Coast beef herds - an example of a low cost retrospective case study technique

Summary

JohneΓÇÖs disease is a slowly progressive enteropathy of predominantly ruminants due to infection by Mycobacterium avium subsp. paratuberculosis (Map.). Map. is an obligate intracellular pathogen. The disease occurs in most livestock producing countries and the prevalence is rising globally (Collins, 2003). Bovine JohneΓÇÖs disease (BJD) is predominantly associated with specific strains of Map. designated as C (cattle) compared to S (sheep) strains (Whittington et al, 2000). Widely accepted epidemiology regarding BJD includes features such as...