Poultry Vaccines. In cases of systemic infection due to virulent fowlpox virus strains, lesions may be present in internal organs. Cutaneous lesions on the eyelids may cause complete closure of one or both eyes. Nodular lesions on unfeathered skin are common in the cutaneous form. Pathogenic mechanisms: The large DNA virus present in fowlpox lesions an in the Poxviridae family is resistant to normal environment and may survive for extended periods in dried scabs.
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