Figure 1: Pathology of Car bacillus
Photos courtesy of IDEXX RADIL
The bronchopneumonia from CAR bacillus infection is similar to that of mycoplasmosis.
The right middle lobe appears to be the most commonly affected site.
Peribronchiolar lymphoid hyperplasia with transmucosal lymphocyte migration as in mycoplasmosis is suggestive of CAR bacillus. Silver stains and immunofluorescent techniques will demonstrate the organism (arrow) in tissues.
Slides and descriptions courtesy of University of Missouri-University of Missouri – Comparative Medicine Program and IDEXX-BioAnalytics (IDEXX RADIL), and Craig Franklin, DVM, PhD, Associate Professor.