Download Necropsy (Gross) Lesions

Policy, strategies,
regulations, and
authority
National Animal Health
Services
surveillance
Field and Clinical Operations
Prevention, treatment,
vaccination, awareness
Diagnostic and
Investigation Operations
Laboratory, field response
Pathology of Diseases of Chickens
1.
Avian Influenza
(highly pathogenic)
HPAI – Clinical Disease
high morbidity, high mortality
HPAI – Gross Lesions
shank hemorrhage
subcutaneous edema
Virus infects endothelium
throughout the body.
Subcutaneous and wattle edema
HPAI
HPAI
HPAI
Tracheal hemorrhage
HPAI
Epicardial / Myocardial hemorrhages
HPAI
Pulmonary hemorrhage and edema
Intestinal hemorrhage
HPAI
Pancreatic hemorrhages
Proventricular hemorrhages
Numerous tigers and leopards at SE Asian zoos
NEWCASTLE
DISEASE
Conjunctival hemorrhage
Exotic Newcastle
hemorrhage in gut, over lymphoid
areas, lymphoid necrosis
Peyer’s patch necrosis and hemorrhage
Pancreatic hemorrhage
Exotic Newcastle
Proventriculus hemorrhage
Exotic Newcastle
Splenic hemorrhage and necrosis
Exotic Newcastle
Egg from Infected Chicken
Source: Dennis Senne, USDA:APHIS:VS:NVSL
Depression
Torticollis
Source: Dennis Senne, USDA:APHIS:VS:NVSL
Respiratory distress
Source: Dennis Senne, USDA:APHIS:VS:NVSL
Discharge from nares.
Exotic Newcastle
3. Infectious Bronchitis Virus
(IBV).
Infectious Bronchitis Virus (IBV)
• High stocking density,
poor ventilation.
• Coughing, sneezing.
• Drop in egg production
and quality.
4. Infectious Laryngotracheitis
(ILT).
Infectious Laryngotracheitis (ILT)
• High stocking density,
poor ventilation.
• Coughing, gasping.
• Drop in egg production
and quality.
Dyspnea
ILT
Serous ocular discharge
ILT
Fibrinous, necrotizing laryngotracheitis, bronchitis.
5. Sinusitis, Pneumonia.
Infraorbital sinusitis
Air Sacculitis with caseous necrotic material
Granulomatous (fungal) pneumonia
Granulomatous (fungal) pneumonia
Granulomatous (fungal) pneumonia
Granulomatous (fungal) pneumonia
Hemorrhagic necrotizing pneumonia
4. Parasitic enteritis, typhlitis.
- Histomonas meleagridis.
- Eimeria spp.
- E. acervulina
- E. tenella
- E. necatrix
Lethargic, watery / mucoid diarrhea.
Lethargic, watery / mucoid diarrhea.
Paired ceca
Necrotizing typhlitis and hepatitis
- Histomoniasis
Liver
Necrotizing typhlitis and hepatitis
- Histomoniasis
Paired ceca
Necrotizing typhlitis
- Histomoniasis
Necrotizing typhlitis
- Histomoniasis
Necrotizing typhlitis
- Histomoniasis
Small intestines
Necrotizing, hemorrhagic enteritis.
- Eimeria spp.
Small intestines
Necrotizing, hemorrhagic enteritis.
- Eimeria spp.
5. Bacterial enteritis.
- Salmonella pullorum
Rectal prolapse - Salmonella
Small intestine - Salmonella
Rectal prolapse - Salmonella
Small intestine - Salmonella
Fibrinous epicarditis – Salmonella pullorum (Pullorum disease)
Splenitis – Pullorum Disease
Hepatitis – Pullorum Disease
Splenitis – Pullorum Disease
Hepatitis – Pullorum Disease
Fibrinous epicarditis – Salmonella pullorum (Pullorum disease)
Arthritis – Pullorum Disease
6. Bacterial septicemia.
- Escherichia coli
pneumonia
E. coli peritonitis
E. coli air sacculitis & hepatitis
E. coli pneumonia
air sacculitis & hepatitis
E. coli pneumonia
7. Infectious Bursal Disease.
- Infectious Bursal Disease Virus
- “Gumboro Disease”
8. Fowl Pox.
Crusting, proliferative
Fowl Pox
The
End
Poultry Diseases
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Avian Influenza (highly-pathogenic).
Exotic Newcastle Disease.
Infectious Bronchitis Virus.
Infectious Laryngotracheitis Virus.
Sinusitis & pneumonia.
Parasitic enteritis & typhlitis.
Bacterial enteritis.
Bacterial septicemia.
Infectious Bursal (Gumboro) Disease.
Fowl pox.
Eimeria spp.
Histomonas
Cryptosporidium