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Avian salmonellosis
This document discusses avian salmonellosis caused by Salmonella bacteria in poultry. It presents the clinical signs and lesions of three main infections: Pullorum disease, Fowl typhoid, and Paratyphoid. Pullorum disease and Fowl typhoid cause depression, respiratory distress, diarrhea, and other signs. Their lesions include nodes in organs, liver necrosis, and more. Paratyphoid signs include drowsiness and diarrhea, and its lesions involve liver focal necrosis and inflammatory lesions in the ceca. Together these infections pose serious health challenges for the poultry industry.
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Avian salmonellosis
- 1. Avian Salmonellosis Prepared by: MuhammadAfzal 2012-ag-2474
- 2. Avian Salmonellosis • Bacteriaof the genus Salmonella have long presented serious challenges to the poultry industry and are responsible for significant health problems in non poultry avian species as well. • Infections: • Pullorum Disease • Fowl Typhoid • Paratyphoid
- 3. Pullorum Disease • Signsin Young birds: • Depression • Respiratory distress • Loss of appetite • White diarrhoea • Pot ballied • Huddle near heat source • Signs in Older birds: • Pale shrunken combs • Ruffled feathers • Low egg production
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- 9. Lesions • Grayish whitishnodes in heart and gizzard walls. • Grayish whitish milliary necrosis in liver. • Ureters are often filled with urates. • Unabsorbed yolk sacs. • Enlarged spleen. • Cheesy material in ceca. • Peritonitis. • Ascites. • Hemorrhagic ovarian follicles.
- 10. Grayish whitish nodesin heart and gizzard walls
- 11. Grayish whitish milliarynecrosis in liver
- 12. Ureters are oftenfilled with urates
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- 18. Fowl Typhoid • Fowltyphoid is an infectious disease, primarily of chickens and turkeys, with many of the clinical and epidemiologic features and lesions that occur with pullorum disease. • Signs • Signs of fowl typhoid and pullorum disease are similar in birds less than approximately 1 month old. • Semimature and mature birds with fowl typhoid often have pale head parts (comb, wattles, face), shrunken combs and wattles. • Diarrhoea(bright yellow splashes).
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- 20. Pale comb andwattles
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- 24. Lesions (acute+chronic) • Acharacteristic lesion for acute fowl typhoid in adult birds is the enlarged and bronze greenish tint of liver. • In some instances, the enlarged liver is mottled with multiple milliary necrosis. • The spleen is 2-3 times bigger, sometimes with greyish-whitish nodules prominating on the surface, representing hyperplasic follicles. • Enteritis. • Myocardial necrosis.
- 25. • Lungs acquirea characteristic brown colour. • Ovaries are affected by inflammatory and degenerative changes. • Frequently, affected follicles are deformed and appear like thick pendulating masses. • Fibrinous adhesive peritonitis
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- 27. Enlarged liver mottlednecrosis
- 28. 2-3 times enlargedspleen
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- 35. Paratyphoid • Fowl paratyphoidis an acute or chronic disease in domestic fowl and many other avian or mammalian species, caused by some motile Salmonella serotypes that are not host-specific. The highest morbidity and death rates are usually observed during the first 2 weeks after hatching. • Signs • Drowsiness. • Ruffled eyes • Diarrhoea • Pasting around vent • Subcutaneous oedemas in the region of the neck. • Huddling near heat source
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- 40. Lesions • Focal necrosisin liver • Inflammatory fibrinous exudates in Caeca. • Unabsorbed yolk sacs • In the liver, hyperaemia, sub capsular haemorrhages and dystrophy are detected. • Pericarditis, and per hepatitis is detected. • Inflamed footpad.
- 41. Focal necrosis inliver
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- 47. References • Avian DiseaseManual by AAAP; 6th Edition, 2006. • A color Atlas of Poultry Diseases. • WWW.thepoultrysite.com