墨西哥发生H7N3型高致病性禽流感 6只野鸟死亡

    食品伙伴网讯   据世界动物卫生组织（OIE）消息，5月8日墨西哥向OIE发布紧急报告称，4月28日恰帕斯州（Chiapas）野生动物发生一起H7N3亚型高致病性禽流感。有6只小灰头稚冠雉和2只褐背鸫染病、死亡。

    据报道，诊断性质为临床诊断和实验室检验。本次感染来源尚不清楚。

    这是恰帕斯州首次发生高致病性禽流感（墨西哥境内其他地区史上曾发生该病）。已经建立了半径10千米的隔离区，没有发现商业养殖禽感染。

    部分原文报道如下：

    Endemic wild birds were reported having been found dead in a nature reserve called Zapotal; the reserve is in the State of Chiapas, consists of 100 hectares of semi-humid forest, with several species of sapotas, and shows a wide variety of native wildlife of this State. It has about 220 animal species in their natural environments and 154 species living freely in the reserve, of which 62 species of birds. During the initial investigation, three highly pathogenic avian influenza virus of H7N3 subtype were isolated with an intravenous pathogenicity index of 2.91 and 2.99. A 10 km focal and perifocal zone was established and no evidence of infection was found in commercial poultry. Under the national epidemiological surveillance program, a state active epidemiological surveillance program is on-going for 100% of the commercial poultry and, through a statistical sample size, in backyard poultry, based on serological, virological and molecular testing; no evidence of infection was found in commercial poultry or in backyard poultry. The affected species are Ortalis vetula and Turdus grayi. The epidemiological investigation continues.

    原文链接：<http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=17686&newlang=en>