Intrauterine and transmammary transmission of<i>Mycobacterium avium</i>subsp<i>paratuberculosis</i>in sheep

Abstract

Although intrauterine or transmammary transmission of Mycobacterium avium subsp paratuberculosis may occur frequently in clinically affected sheep, these are less common in subclinically infected ewes. Therefore these modes of transmission are unlikely to compromise existing control programs for ovine Johne's disease on most farms, especially if programs include the immediate culling of clinically affected sheep.