(a-c). Histological illustration of infectious agents in white rhinoceros lung.

<p>(a) A single fine short acid fast bacterial rod consistent with Mycobacteria (black arrow) in a multinucleate giant cell in a granuloma in the tracheobronchial lymph node (PB1, Ziehl Neelsen, x400). (b) A syncytial cell (black arrowhead) consistent with viral etiology associated with acute interstitial pneumonia (PB2, H&E, x400). (c) Nematode larval section (double arrowhead) associated with subacute lymphoplasmacytic (#) and eosinophilic (°) pneumonia (PB2, H&E, x100).</p

(a-f). Characterization of histological lung lesions in white rhinoceroses.

<p>(a) Acute inflammation: acute ulcerative bronchitis with necrosis (n) and neutrophils (*) in the lumen (PB2, H&E, x200). (b) Subacute inflammation: lymphoplasmacytic (#) and histiocytic (^) interstitial pneumonia (PB2, H&E, x200). (c) Subacute inflammation with necrosis: interstitial pneumonia from with central necrosis (PB2, H&E, x100). (d) Chronic pulmonary granuloma with a capsule (white arrow) and mineralized (m) cellular and inflammatory debris in the center (PB2, H&E, x40). (e) A chronic pulmonary inflammatory focus with a capsule and central mineralized material and a fibrous nodule (white arrowhead) with a few inflammatory cells in the center (PB1, H&E, x40). (f) Fibrous nodule (black arrowhead) consisting only of mature collagen (PB1, H&E, x100).</p

Characterization of lesions in lungs and lymph nodes of three experimentally infected white rhinoceroses.

<p>Characterization of lesions in lungs and lymph nodes of three experimentally infected white rhinoceroses.</p