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Background  Soil-transmitted helminth (STH) infections with  Ascaris lumbricoides , hookworm and  Trichuris trichiura  affect large parts of the world’s population. For the implementation of national STH control programs, e.g. preventive chemotherapy (treatment with albendazole and mebendazole), the spatial distribution and prevalence of STH infections must be known. However, for Lesotho only little data were available and the STH distribution remains largely unknown.    Methods  In early 2016, a cross-sectional parasitological STH survey was conducted including six different primary schools in the Butha-Buthe district of Lesotho. In each school stool samples were collected from 50 children (age 8–14 years) and analysed with a duplicate Kato-Katz thick smear for the presence of  A. lumbricoides , hookworm and  T. trichiura .    Results  A total of 301 children provided a stool sample. All children were negative for  A. lumbricoides  and  T. trichiura . Only two children from one primary school showed a light hookworm infection.    Conclusion  Our data indicate a low prevalence of STH infections in the Butha-Buthe district of Lesotho. Additional parasitological surveys on the prevalence and the spatial distributions of STH infections across the entire country of Lesotho are needed.

Unexpected low soil-transmitted helminth prevalence in the Butha-Buthe district in Lesotho, results from a cross-sectional survey