| INFECTIOUS BRONCHITIS (IB) |
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Causative Agent: Coronavirus of several atrains |
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Transmission: 1. Droplet inhalation of aerosol 2. Ingestion of contaminated feed and water 3. Contact with infected chickens, contaminated equipment, clothing of caretakers. |
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Incubation Period: 18 to 48 hours. |
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Morbidity: nearly 100% |
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Mortality: 60% in young chickens. Less than 5% in adult chickens. |
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Age Group affected: All age are affected. |
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Signs: !. Coughing, sneezing raies. 2. Weakness, depression and huddling. 3. Drop in egg production with soft-shelled or misshapen eggs. 4. Diarrhea. |
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Gross Lesions: Trachea and bronchi - mucoid exudate. Air sacs - thickened and opaque. Kidneys - swollen with ureters and tubules distended with urates. Ovary - ovarian follicles appear flaccid with yolk material throughout peritoneal cavity. Oviduct - presence of impaction. |
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Diagnosis: 1. Viral isolation 2. ELISA test 3. Virus neutralization test 4. HI test |
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Differential Diagnosis: Newcastle Disease. Infectious Laryngotracheitis. |
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Prevention: Vaccination |
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Control: Reduce mortality through antibiotic therapy and increasing temperature in the house. |
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Recommended Supportive Medication: None. |
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