Poultry typhoid is a bird septic infection caused by Salmonella Typhimurium. (1) Epidemiology and Symptoms The disease mainly affects young chicks and adult chickens over 1 week old, but chicks also have infections. Older chickens over 5 years of age are more resistant. Due to the prevalence of eggs, poor hatching and disinfection, and poor management of the brooding room, it has spread. The incubation period of this disease is generally 3 days. At the beginning of the illness, it is manifested as a lack of energy. Outliers do not like activities. The head and wings were drooping, crowns and flesh were pale and gradually shrunk, appetite was abolished, yellowish-green thin stools were drained, and the feathers around the anus were stained. Some chickens have peritonitis and abdominal pain shows penguin standing posture. (B) pathological changes in dead chicken liver, splenomegaly, hyperemia. Swollen livers sometimes appear pale green brown or bronze. The liver and myocardium are scattered with a grayish white necrotic spot. The gallbladder is dilated and full of bile. There are pericarditis lesions. The follicles are bleeding, deformed, and discolored. Poultry often causes peritonitis due to rupture of the follicles. There are catarrhal enteritis with varying severity in the intestine, and the inflammation of the small intestine is heavier. The young ducks have a shorter course of disease during poultry typhoid fever and are somewhat similar to chicks. Diseased ducks had myocardial hemorrhage, mild splenomegaly, catarrhal inflammation in the lungs and intestines, but no grey-white necrosis. The adult duck has the same ovarian lesions as the adult chicken. (C) Diagnosis According to the age of onset, typical symptoms and pathological changes can be initially diagnosed, if necessary, laboratory bacterial examination. During the diagnosis process, attention should be paid to the differences between chicken fleas and fowl cholera. (D) Prevention and control of strengthening feeding management, pay attention to environmental health, and improving the quality of eggs is the main measure to prevent this disease. Once the disease can be used norfloxacin drinking water or oxytetracycline, furazolidone and other spices. When using sulfa drugs, do not overdo it to prevent poisoning. China Agricultural Network Editor
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