Summary of the 2001–02 Pennsylvania H7N2 Low Pathogenicity Avian Influenza Outbreak in Meat Type Chickens

摘要: Abstract H7N2 low-pathogenicity (LP) avian influenza (AI) virus was isolated from chickens submitted to the Pennsylvania Animal Diagnostic Laboratory System on December 4 and 5, 2001. The cases were two broiler breeder flocks in central that had clinical signs of an acute, rapidly spreading respiratory disease. Seroconversion AI detected follow-up sampling. Subsequently, LPAI five different flock between 14, 2001, January 3, 2002. Clinical lesions broilers, when present, compatible with multicausal With exception one processed, birds all positive euthanatized in-house within 11 days original case submission date. Increased surveillance poultry 10-mile radius zones centered at foci farms continued until March 1, No additional detected.