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Symptoms and Prevention and Treatment of Avian Encephalomyelitis in Chickens

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This disease is an infectious disease caused by avian encephalomyelitis virus, characterized mainly by attacking the nervous system. Chickens, pheasants and quail can all be infected. Key points for diagnosis: Epidemiological characteristics: chickens of all ages can be infected through the digestive tract. It can also be transmitted vertically through eggs laid by infected breeding hens. Some develop the disease as soon as they hatch, which proves that they were already infected during the embryonic stage. Clinical symptoms: because the virus mainly attacks the nervous system, it manifests as unsteady walking, circling movements or spinning in place, or paralysis of both legs and falling to the ground, with head and neck tremors.

This disease is an infectious disease caused by avian encephalomyelitis virus, characterized mainly by attacking the nervous system. Chickens, pheasants and quail can all be infected.

Key points for diagnosis:

Epidemiological characteristics: chickens of all ages can be infected through the digestive tract. It can also be transmitted vertically through eggs laid by infected breeding hens. Some develop the disease as soon as they hatch, which proves that they were already infected during the embryonic stage. Clinical symptoms: because the virus mainly attacks the nervous system, it manifests as unsteady walking, circling movements or spinning in place, or paralysis of both legs and falling to the ground, with head and neck tremors. Symptoms in adult chickens are not obvious. A drop in egg production can be seen in hens.

Pathological features: gross lesions are not obvious. A microscope is needed to observe the lesions in tissue cells.

Prevention and treatment measures: Preventive measures: breeding hens should be vaccinated before the start of laying. Their antibodies can be passed on to the next generation through the chicken embryo, so that chicks within one month after hatching will not be infected with this disease. Vaccinating chicks is not advocated, because it will produce adverse reactions. Treatment methods: there is currently no specific drug for treatment.

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