This study describes the ultrastructural changes and distribution of P. multocida B:2 in the respiratory and gastrointestinal tracts of buffalo calves following oral exposure and compared with intratracheal exposure. Nine 8-month old buffalo calves were divided into 3 groups. https://www.countryscenesaddleryandpetsuppliers.shop/product-category/headstall-and-breast-collar-sets/