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Meteorological factors affecting seroconversion of Akabane disease in sentinel calves in the subtropical Okinawa Islands of Japan

机译:影响日本亚热带冲绳群岛塞内尔牛犊塞卡纳氏病血清转化的气象因素

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摘要

Akabane virus, the pathogen-causing Akabane disease, is an arthropod-borne virus (arbovirus) transmitted by the Culicoides biting midge. A nationwide serological surveillance program for bovine arboviral diseases, including Akabane disease, has been established in Japan to monitor the circulation of arboviruses by targeting sentinel calves. Okinawa, which is located in the southwestern-most region of Japan, is a high-risk area for incursion of arboviruses. The aim of the present study was to identify the meteorological factors related to farm-level seroconversion of Akabane virus by analyzing the serological surveillance data for sentinel calves collected in Okinawa between 2007 and 2015. Rainfall in winter, spring, and autumn was positively associated with seroconversion. Adequate rainfall seems to keep the soil in a suitably moist state for growth and survival of biting midges. Maximum temperature in winter was also positively associated with seroconversion in sentinel calves. The warmer temperatures in winter may provide conditions suitable for shortening the larval development cycle and increase production of adult midges. Our findings indicate that meteorological factors such as temperature and rainfall may be important factors that produce circumstances conducive to effective transmission of the virus between vectors and the host. The results of this study provide a better understanding of the circulation of arboviruses and offer suggestions for developing better surveillance and measures to prevent arboviral disease.
机译:阿卡巴尼病毒是一种导致的阿卡巴尼疾病,是由尖塔的核状的节肢动物传播的病毒(Arbovirus)。在日本建立了一家全国牛群疾病,包括阿卡巴南纳病的血管病毒疾病,以监测哨兵牛犊的群体血管病毒。冲绳,位于日本大多数地区的西南部,是禁止遗传病毒的高风险区域。本研究的目的是通过分析2007年至2015年在冲绳收集的Sentinel Calves的血清学监测数据来确定与阿卡巴恩病毒的农场血清转化有关的气象因素。在冬季,春季和秋季降雨量与血清转换。充足的降雨似乎将土壤保持适当潮湿的刺激和生存的咬合中介。冬季的最高温度也与Sentinel Calves中的血清转换呈正相关。冬季温暖的温度可能提供适合缩短幼虫发育循环的条件,并增加成人中介的产量。我们的研究结果表明,温度和降雨等气象因素可能是产生有利于有效传播载体和宿主之间病毒的情况的重要因素。该研究的结果提供了更好地了解野兽流动率的循环,并提出了制定更好的监测和措施,以防止野蛮疾病。

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