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首页> 外文期刊>Journal of Medical Entomology >Antibody response of wild birds to natural infection with Alphaviruses.
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Antibody response of wild birds to natural infection with Alphaviruses.

机译：野生鸟类对甲病毒自然感染的抗体反应。

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From 1986 to 1990, we conducted our 2nd longitudinal study in the central (upstate) New York (CNY) area in the USA on the wild avian hosts of eastern equine encephalomyelitis (EEE) virus. Field-collecting methods mirrored a study conducted from 1978 to 1980 at the same endemic focus. Over the five-year study period, we captured 6296 birds representing 99 species and took 4174 blood samples from representatives of 83 species. Gray catbirds, song sparrows, and veerys were the three dominant species captured and bled, accounting for 40 and 55% of birds captured and bled. Blood clots were assayed for virus and sera tested for haemagglutination-inhibition (HI) antibodies to EEE and Highlands J virus. Virus isolations from birds defined two epiornitics of EEE virus in 1988 and 1990, and an epiornitic of HJ virus in 1986. Infected birds responded with the production of HI antibodies with titres indicative of recent infection (HI >=1:160), and titres of sera positive during the epiornitics were significantly higher than positive sera during nonepiornitics. The 1990 EEE epiornitic extended from mid-July to the end of September, providing data to compare infection rates among species, habitats, and combinations of species with habitats. Few significant differences were found. The HJ epiornitic was only the 2nd time this virus has occurred in CNY. Song sparrows were identified as the primary amplifying avian host of both viruses, although our capture and serological data would suggest a role for gray catbirds as the species most likely involved in yearly virus reintroduction. However, the cryptic nature of enzootic virus maintenance remains unresolved for the CNY virus foci. The appearances of HJ and EEE viruses were not epidemiologically linked, and there were no virus isolations from adults returning on site or virus isolations without concurrent isolations from mosquito vectors. Whether EEE and/or HJ virus are consistently present in or sporadically introduced into the inland foci of CNY area still has not been determined.
机译：从1986年到1990年，我们在美国中部（上州）纽约州（CNY）地区对东部马脑脊髓炎（EEE）病毒的野生禽类宿主进行了第二次纵向研究。野外采集方法反映了从1978年到1980年在同一流行病重点上进行的一项研究。在五年的研究期间，我们捕获了6296只代表99种动物的鸟类，并从83种动物的代表那里采集了4174份血液样本。灰猫，松雀雀和小天鹅是捕获和放血的三个主要物种，分别占捕获和放血鸟类的40％和55％。检测血块中的病毒，并检测血清中针对EEE和Highlands J病毒的血细胞凝集抑制（HI）抗体。从鸟类中分离出的病毒定义了1988年和1990年的两种EEE病毒上皮性疾病，以及1986年的HJ病毒的上皮性疾病。受感染的鸟类产生了HI抗体，其滴度指示最近的感染（HI> = 1：160）和滴度上嗅期间阳性血清的比率显着高于非上嗅期间阳性的血清。 1990年的EEE附生期从7月中旬延长到9月底，提供了用于比较物种，生境以及物种与生境组合之间的感染率的数据。几乎没有发现显着差异。 HJ上生殖器是该病毒第二次以CNY出现。尽管我们的捕获和血清学数据表明，灰麻雀作为最有可能参与每年重新引入病毒的物种，但松雀麻雀被确认为两种病毒的主要扩增禽宿主。但是，对于CNY病毒病灶，仍未解决其对维他命病毒维持的隐秘性质。 HJ和EEE病毒的出现在流行病学上没有关联，也没有从现场返回的成年人中分离出病毒，也没有从蚊媒中同时分离出病毒。尚未确定EEE和/或HJ病毒是否一直存在于CNY地区的内陆疫源地还是偶发地引入CNY地区的内陆疫源地。

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