Immunohistochemical Staining of Lung Sections of Calves with <i>M.bovis</i> Infection.

<p>The lung tissues of calves from the negative control group (A), <i>M. bovis</i> HB0801- (B) and PG45-infected groups (C) were detected after immunohistochemical staining with monoclonal antibody to <i>M. bovis</i>. The positive cells were stained brown and the negative cells were counter-stained blue with hematoxylin. The positive cells were situated in bronchiole epithelia.