2002年路易斯安那州圣塔曼尼教区西尼罗河病毒的鸟类宿主

Avian hosts for West Nile virus in St. Tammany Parish, Louisiana, 2002.

作者信息

Komar Nicholas, Panella Nicholas A, Langevin Stanley A, Brault Aaron C, Amador Manuel, Edwards Eric, Owen Jennifer C

机构信息

Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado 80522, USA.

出版信息

Am J Trop Med Hyg. 2005 Dec;73(6):1031-7.

PMID:16354808

Abstract

West Nile virus (WNV) infections in free-ranging birds were studied in Slidell, St. Tammany Parish, Louisiana, after a human encephalitis outbreak peaked there in July 2002. Seroprevalence in resident, free-ranging wild birds in one suburban site was 25% and 24% in August and October, respectively, indicating that most transmission had ceased by early August. Mortality rates, seroprevalence rates, host competence, and crude population estimates were used in mathematical models to predict actual infection rates, population impacts, and importance as amplifying hosts for several common passerine birds. Northern cardinal (Cardinalis cardinalis) and house sparrow (Passer domesticus) were the principal amplifying hosts, but blue jay (Cyanocitta cristata) and northern mockingbird (Mimus polyglottos) also contributed. The blue jay population was reduced by an estimated 47%. A variety of passerine bird species combined to play an important role as amplifying hosts in the WNV transmission cycle.

摘要

2002年7月路易斯安那州圣塔曼尼堂区斯莱德尔出现人类脑炎疫情高峰后，对该地区自由放养鸟类的西尼罗河病毒（WNV）感染情况进行了研究。在一个郊区地点，8月和10月常住自由放养野生鸟类的血清阳性率分别为25%和24%，这表明到8月初大部分传播已经停止。在数学模型中使用死亡率、血清阳性率、宿主易感性和粗略的种群估计来预测几种常见雀形目鸟类的实际感染率、种群影响以及作为扩增宿主的重要性。北美主红雀（Cardinalis cardinalis）和家麻雀（Passer domesticus）是主要的扩增宿主，但冠蓝鸦（Cyanocitta cristata）和北方嘲鸫（Mimus polyglottos）也有一定作用。冠蓝鸦种群估计减少了47%。多种雀形目鸟类共同在西尼罗河病毒传播循环中作为扩增宿主发挥了重要作用。