Burke D S, Tingpalapong M, Ward G S, Andre R, Leake C J
Southeast Asian J Trop Med Public Health. 1985 Jun;16(2):199-206.
Epidemic Japanese encephalitis recurs annually in the northern provinces of Thailand, but in the southern provinces cases of human encephalitis are rare. We investigated transmission of Japanese encephalitis virus (JEV) to pigs in southern Thailand. Blood specimens from one hundred young pigs at abattoirs in three southern provinces were tested for JEV hemagglutination inhibiting (HAI) antibodies. Seventy-four percent were positive. Ten seronegative sentinel pigs were placed at five locations in one southern province. Seven of the ten pigs developed JEV HAI and JEV IgM ELISA antibodies within two weeks of placement. JEV was isolated from all seven seroconverting sentinel pigs from blood specimens collected 3 to 11 days after placement. Fifteen light-trap mosquito collections at the five locations all included known JEV vectors, some in large numbers. We conclude that there is intense transmission of JEV to pigs in southern Thailand despite the rare occurrence of human encephalitis in the same region.
流行性乙型脑炎在泰国北部省份每年都会复发，但在南部省份，人类脑炎病例很少见。我们调查了泰国南部乙型脑炎病毒（JEV）向猪的传播情况。对来自南部三个省份屠宰场的100头幼猪的血液样本进行了JEV血凝抑制（HAI）抗体检测。74%呈阳性。在一个南部省份的五个地点放置了10只血清阴性哨兵猪。10只猪中有7只在放置后的两周内产生了JEV HAI和JEV IgM ELISA抗体。从放置后3至11天采集的血液样本中，从所有7只血清转化哨兵猪中分离出了JEV。在这五个地点进行的15次灯光诱捕蚊子采集均发现了已知的JEV传播媒介，有些数量还很多。我们得出结论，尽管同一地区人类脑炎罕见，但泰国南部存在JEV向猪的强烈传播。
