The initial epidemiological studies in the low endemicity schistosomiasis area in esteio, Rio Grande do Sul, the southernmost Brazilian State, 1997 to 2000
The initial epidemiological studies in the low endemicity schistosomiasis area in esteio, Rio Grande do Sul, the southernmost Brazilian State, 1997 to 2000
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DOI：
10.1590/s0074-02762004000900013
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发表时间：
2004-08-01
期刊：
影响因子：
--
通讯作者：
Amaral, Ronaldo Santos do
中科院分区：
文献类型：
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作者：
Graeff-Teixeira, Carlos;Valar, Cristiana;Amaral, Ronaldo Santos do
1997年以前，巴西最南端的南里奥格兰德州也没有报道过光滑双脐线虫和曼氏血吸虫。他们在锡诺斯河埃斯泰奥附近的发现证实了血吸虫病向南蔓延的预测。从1997年到2000年，对人群的钉螺和粪便样本进行了寄生虫学检查。5次调查中的最后3次是在人口普查中确定的风险群体中进行的血清学筛查程序。共发现11名感染者，2个不同地点的钉螺均呈S阳性。mansoni将这2个研究中心和其他研究中心的样本鉴定为B。光滑的11例患者中有6例粪便中的虫卵计数低于1/g。锡诺斯河附近的水接触活动的一些社会文化观念可能会给控制工作带来困难，但它们也可能部分地阻碍传播强度的快速增加。美洲最南端的曼氏巨口吸虫疫源地引起了人们对其持续扩张的警惕。
Nor Biomphalaria glabrata neither Schistosoma mansoni were reported from Rio Grande do Sul, the southernmost Brazilian state before 1997. Their detection next to the Sinos River Esteio, confirmed predictions of schistosomiasis expansion to the south. Parasitological examinations both in snails and fecal samples from the human population were performed from 1997 to 2000. The last 3 out of 5 surveys were performed after a preliminar serological screening procedure in a risk group identified at a population census. A total of 11 infected individuals were found infected and snails from 2 different sites were positive for S. mansoni. Samples from these 2 and other sites were identified as B. glabrata. Egg counts in feces were below 1 per gram in 6 out of 11 patients. Some socio-cultural perceptions of water contact activities next to the Sinos River may cause difficulties to control efforts, but they also may be partially acting against a very rapid increase in transmission intensity. The southernmost schistomiasis mansoni foci in Americas rise the alert for its ongoing expansion.