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(added on 2013/08/30)

Headaches near pig farms 豬場周邊的煩惱

©2013 SpatioEpi.com
Map created by CUHK SpatioEpi Group

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Japanese encephalitis (JE) is a mosquito-borne viral infection, of which pigs and wild birds are the natural reservoirs. It poses public health threats in some South and South-east Asian countries.

In Hong Kong, there were 11 local JE cases and 5 imported cases since 2003. Most of the infections were reported in June and July. The hot and humid weather during this period favours breeding of the vector.

The map shows the distribution of all reported JE cases in Hong Kong in the past 10 years. As depicted by black solid dots, the majority were residents in Yuen Long District. Location of all eight cases in Yuen Long were within 2 kilometres of pig farms. Three local cases occurring in areas not in the proximity of pig farms may possibly be explained by their contacts with wild birds or infected mosquitoes brought through air currents.

Data for the map were extracted from media reports.

日本腦炎是一種經蚊子傳播的疾病,致病原是一種以豬隻或野鳥為天然宿主的病毒。日本腦炎一直為部分南亞及東南亞國家帶來公共衛生的威脅。

自2003年,香港共有11宗本地日本腦炎個案及5宗外地傳入個案,大部分患者均於六月至七月期間受到感染。這段時間的香港炎熱多雨,有利病媒滋生。

地圖顯示過去十年本港所有已呈報的日本腦炎個案分佈。依圖中的黑色圓點所示,大部分本地個案的患者都居於元朗區(共8宗),而離他們居所的兩公里範圍內均發現豬場。另外3宗本地個案的患者並不是居於豬場附近,他們的感染或與受感染的野鳥或被氣流帶離豬場的蚊隻相關。

地圖資料源自不同的媒體報導。