Charles Louis Davis and Samuel Wesley Thompson DVM Foundation

For the Advancement of Veterinary and Comparative Pathology

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Image: F16249

Pathology Image
  • SPECIES:
    • BOVINE
  • SYSTEM:
    • RESPIRATORY
  • ORGAN:
    • LUNG
  • DIAGNOSIS:
    • FOCAL SUPPURATIVE AND NECROTIZING PNEUMONIA, CONTAGIOUS BOVINE PLEUROPNEUMONIA
  • CAUSE:
    • MYCOPLASMA MYCOIDES MYCOIDES
  • CONTRIBUTOR:
    • GREGG
  • INSTITUTION:
    • USDA FOREIGN ANIMAL DISEASE DIAGNOSTIC LAB, PLUM ISLAND
  • GENPATH:
    • BACTERIA
  • COMMENTS:
    • The affected areas of lung are firm and raised above the normal adjacent lung. When the firm area is cut, it is odorless and has the typical marbled appearance of CBPP - red, grey, or yellow lobules outlined by yellowish (edematous) or white (conective tissue) interlobular septa and subpleural tissue. The distension of the interlobular septa decrease as the distance increases from the center of the lesion. Necrotic areas of lung have an opaque appearance and normal lung structure is still evident - coagulative necrosis. These necrotic areas may be 6-7 cm in diameter or larger and may be surrounded by connective tissue - a sequestrum. Small CBPP lesions will have the same recognizable appearance as large lesions.