Figure 3. Lungs from chickens infected intratracheally with IMT5155 (10⁹ CFU).

Lungs were fixed 24 h p.i.; sections were stained with (A) HE or (B) anti-O2 antibody and counter-stained with hematoxylin, and examined with a light microscope. Inflamed parabronchi coincide with the presence of bacteria, labeled with anti-O2. Scale bars 400 µm. BV, blood vessel.