Intrauterine and transmammary transmission of Mycobacterium avium subsp paratuberculosis in sheep.
C Lambeth, LA Reddacliff, P Windsor, KA Abbott, H McGregor, RJ Whittington
Australian Veterinary Journal | Published : 2004
OBJECTIVE: To investigate intrauterine infection of foetuses with Mycobacterium avium subsp paratuberculosis and the presence of infection in mammary secretions of sheep. DESIGN: A study of 142 late-pregnant ewes and their foetuses from two heavily infected flocks. PROCEDURE: Infection of ewes was determined at necropsy by histopathology and culture of tissues and mammary secretions. Antemortem tests (clinical assessment, faecal culture and serology) were also applied. Foetuses from 59 infected ewes and 47 apparently uninfected ewes were examined by culture and histopathology. RESULTS: Five of five ewes with clinical ovine Johne's disease had infected foetuses. Only one of 54 subclinically a..View full abstract