Appleton C C, Ngxongo S M, Braack L E, le Sueur D
Department of Zoology and Entomology, University of Natal, Pietermaritzburg.
S Afr Med J. 1996 Apr;86(4):350-3.
To identify possible public health consequences of Schistosoma mansoni infections in migrants entering north-eastern KwaZulu-Natal and Mpumalanga and Northern Province from southern Moçambique.
(i) Intestinal parasite surveys, one sample per person, within a 4-month period; (ii) temperature recordings and snail collections in an irrigation system.
North-eastern KwaZulu-Natal and Kruger National Park, Mpumalanga and Northern Province.
Ninety-seven migrants (1-68 years) from north-eastern KwaZulu-Natal and 47 from the Kruger Park (1 - 70 years).
The relatively high S. mansoni prevalence may cause problems on the rice paddy scheme in north-eastern KwaZulu-Natal. Ranges and prevalence rates of other parasites were recorded.
S. mansoni prevalence in Moçambicans entering north-eastern KwaZulu-Natal was 14.4%, seven times more than in local residents. S. mansoni is not endemic to this region because most bodies of water become too warm for either the parasite or its snail host, Biomphalaria pfeifferi, to develop. Recordings in paddies suggest, however, that the rice modifies the temperature pattern as it grows and provides a suitable habitat for transmission. Migrants entering the Transvaal lowveld where S. mansoni is endemic may become more severely infected. Thirteen other parasite species were recorded from migrants entering KwaZulu-Natal and 8 from those entering Mpumalanga and Northern Province.
The relatively high S. mansoni prevalence among migrants entering north-eastern KwaZulu-Natal may have public health implications as it could encourage transmission in a non-endemic area. The range of parasites carried by migrants entering KwaZulu-Natal, Mpumalanga and Northern Province was similar to that harboured by local people but prevalence rates were generally lower.
确定从莫桑比克南部进入夸祖鲁 - 纳塔尔省东北部、姆普马兰加省和北省的移民中曼氏血吸虫感染可能带来的公共卫生后果。
（i）在4个月内进行肠道寄生虫调查，每人采集一份样本；（ii）在一个灌溉系统中进行温度记录和蜗牛采集。
夸祖鲁 - 纳塔尔省东北部、克鲁格国家公园、姆普马兰加省和北省。
来自夸祖鲁 - 纳塔尔省东北部的97名移民（1 - 68岁）和来自克鲁格公园的47名移民（1 - 70岁）。
曼氏血吸虫相对较高的流行率可能给夸祖鲁 - 纳塔尔省东北部的稻田计划带来问题。记录了其他寄生虫的种类和流行率。
进入夸祖鲁 - 纳塔尔省东北部的莫桑比克人中曼氏血吸虫的流行率为14.4%，是当地居民的7倍。曼氏血吸虫并非该地区的地方病，因为大多数水体对寄生虫或其钉螺宿主菲氏双脐螺来说温度过高，不利于其生长发育。然而，稻田中的记录表明，水稻在生长过程中改变了温度模式，为传播提供了适宜的栖息地。进入曼氏血吸虫为地方病的德兰士瓦低地的移民可能会受到更严重的感染。从进入夸祖鲁 - 纳塔尔省的移民中记录到了13种其他寄生虫，从进入姆普马兰加省和北省的移民中记录到了8种。
进入夸祖鲁 - 纳塔尔省东北部的移民中曼氏血吸虫流行率相对较高，可能对公共卫生产生影响，因为这可能会在非流行地区促进传播。进入夸祖鲁 - 纳塔尔省、姆普马兰加省和北省的移民携带的寄生虫种类与当地人相似，但流行率通常较低。
