Maeda O, Karaki T, Kuroda A, Sasaki O, Karoji Y, Takenokuma K
Jpn J Med Sci Biol. 1978 Jun;31(3):277-90. doi: 10.7883/yoken1952.31.277.
When vector mosquitoes engorged by feeding on pigs are tested for virus recovery after incubation for 7 to 10 days, the results may show mosquito infection itself. Therefore, seasonal prevalence of infection in each pig population can be estimated from course of the infection rate among mosquitoes. Many mosquitoes of the main vector of Japanese encephalitis virus, Culex tritaeniorhynchus summorosus, collected by light traps everyday or every other day in some pig sheds from 1967 to 1970 were tested for virus recovery after incubation. The tests were positive during about a month period each summer, and the peak infection rate was high being over 10%. The course of the mosquito infection showed a certain pattern with one or two peaks between the initial recovery and the highest peak. From the interval of 12 to 13 days after the first recovery to the peak, cyclic infection between the pig and the mosquito may occur at the same interval.
当以猪为食而饱血的媒介蚊子在孵育7至10天后进行病毒回收检测时，结果可能显示蚊子自身被感染。因此，可根据蚊子感染率的变化过程来估算每个猪群中感染的季节性流行情况。1967年至1970年期间，在一些猪舍中，每天或每隔一天用诱蚊灯收集日本脑炎病毒主要媒介三带喙库蚊（Culex tritaeniorhynchus summorosus）的许多蚊子，孵育后进行病毒回收检测。每年夏天约有一个月的检测呈阳性，且感染率峰值较高，超过10%。蚊子感染过程呈现出一定模式，在初次回收至最高峰值之间有一到两个峰值。从首次回收后12至13天到峰值期间，猪和蚊子之间可能以相同间隔发生循环感染。
