Question:
On post-mortem examination, cloudiness of air sac membrane with pericarditis and fibrinous perihepatitis are noticed in which disease?
On post-mortem examination, cloudiness of air sac membrane with pericarditis and fibrinous perihepatitis are noticed in which disease?
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Avian Colibacillosis Triad: 1. Fibrinous Airsacculitis + 2. Fibrinous Pericarditis + 3. Fibrinous Perihepatitis ('White sugar coating' of liver and heart).
Updated On: Sep 7, 2026
- Avian influenza
- Chronic respiratory disease
- Egg peritonitis
- Colibacillosis
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Avian Pathogenic Escherichia coli (APEC) infection in commercial poultry produces the classic systemic fibrinous polyserositis triad.
Step 2: Detailed Explanation:
Avian Colibacillosis (caused by Avian Pathogenic Escherichia coli, serotypes O1, O2, O78):
- When inhaled into the respiratory tract, APEC invades through mucosal barriers, causing severe aerogenous bacteremia/septicemia.
- Pathognomonic post-mortem macroscopic lesions consist of the classic 'Colisepticemia Triad':
1. Fibrinous Airsacculitis (cloudiness, thickening, and caseous exudate in thoracic/abdominal air sacs)
2. Fibrinous Pericarditis (thick opaque fibrin coating the epicardium)
3. Fibrinous Perihepatitis (gelatinous to fibrinous pseudomembrane encasing the liver lobes).
Step 3: Final Answer:
Therefore, this lesion triad is characteristic of Colibacillosis, corresponding to option (D).
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