Bulaga L L, Garber L, Senne D, Myers T J, Good R, Wainwright S, Suarez D L
USDA-APHIS-Veterinary Services, Mercer Corporate Park, 320 Corporate Blvd., Robbinsville, NJ 08691, USA.
Avian Dis. 2003;47(3 Suppl):1169-76. doi: 10.1637/0005-2086-47.s3.1169.
Low pathogenicity avian influenza virus (AIV) H7N2 has been isolated since 1994 from retail live-bird markets (LBMs) in the northeastern United States. This study examines the suppliers to the LBMs in New York and New Jersey. In 2001, 185 supplier premises in nine states were surveyed for the presence of AIV by virus isolation (VI) in embryonating chicken eggs. No H7 or H5 virus was isolated. In addition, 104 producer premises in two states were serologically negative for H7 and H5 AIV. Information on management practices was obtained via questionnaire for 191 premises in 12 states. The survey results suggest that current biosecurity practices at supplier premises could be improved, especially regarding movement of birds. The study supports the hypothesis that H7N2 AIV is primarily maintained within the LBMs and, if reintroduction from suppliers is occurring, it is likely reintroduced at a very low level or from suppliers not included in this study.
自1994年以来，低致病性禽流感病毒（AIV）H7N2已在美国东北部的零售活禽市场（LBM）中分离出来。本研究调查了纽约和新泽西州LBM的供应商。2001年，通过在鸡胚中进行病毒分离（VI），对九个州的185个供应商场所进行了禽流感病毒检测。未分离出H7或H5病毒。此外，两个州的104个养殖场在血清学上对H7和H5禽流感病毒呈阴性。通过问卷调查获取了12个州191个场所的管理实践信息。调查结果表明，供应商场所目前的生物安全措施有待改进，特别是在鸟类移动方面。该研究支持以下假设：H7N2禽流感病毒主要在LBM中维持，如果正在从供应商处重新引入，很可能是以非常低的水平重新引入，或者是从本研究未包括的供应商处引入。
