Multifocal, often randomly distributed, wet, firm (meaty), dark red areas with a lobular pattern; purulent exudate can be expressed from bronchi.
Sharp demarcation between aerated and non-aerated lung areas is seen. There are multiple small foci of alveolar wall consisting of cells with loss of cellular details, hypereosinophilic cytoplasm and pyknotic nuclei (necrosis). Exudate mixed with celluar debris, numerous accumulations of leucocytes and bacterial colonies within alveoli. Infiltrations (mainly neutrophils and macrophages) is seen within bronchial and bronchiolar lumina. Often microthrombi (eosinophilic, hyalin material) in alveolar capillaries seen. Normal bronchial epithelium.
Bronchopneumonia, catarrhal-suppurative, moderate, subacute (uncharacteristic localization)
Pneumonia, suppurative necrotizing , multifocal (small foci), moderate, subacute
Infection with Bordetella bronchiseptica: gram-negative, coccoid to oval, pleomorphic, strictly aerobic rods.
Bordetellosis of suckling pigs
Whooping cough-like disease of suckling pigs (under 4 weeks of age), which occurs mainly in winter; can occur as mild purulent bronchopneumonia or fatal septicemia.
Bacteriology: identification of agent