Which one of the following is a viral disease | vedclass

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(B) : Newcastle disease is a highly contagious viral disease affecting many domestic and wild avian species.The causal agent,Newcastle disease virus $

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Newcastle disease

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(B) : Newcastle disease is a highly contagious viral disease affecting many domestic and wild avian species.The causal agent,Newcastle disease virus $(NDV)$,is a negative-sense single-stranded $RNA$ virus.Transmission occurs by exposure to faecal and other excretions from infected birds,and through contact with contaminated feed,water,equipment,and clothing.Signs of infection with $NDV$ vary greatly depending on factors such as the strain of virus and the health,age,and species of the host.Symptoms include respiratory signs (gasping,coughing),nervous signs (depression,inappetence,drooping wings,paralysis),swelling of the eyes and neck,diarrhoea,rough or thin-shelled eggs,and reduced egg production.

Which one of the following is a viral disease of poultry?

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