Background: Schistosomiasis and intestinal helminthiases are signifcant public health issues that severely impact the devel-opment of children and adolescents in impoverished regions, such as the rural village of Soavinarivo in central Madagascar. Teseissues are often associated with defcient hygienic and sanitary conditions.Methods: A prospective cross-sectional study was conducted in October 2017 on children aged 3-15 years. A total of 114 stool samples were collected and analysed using microscopy and molecular techniques to identify schistosomiasis and intestinalhelminthiases. Descriptive statistics assessed prevalence, and binary logistic regression identifed risk factors for helminthinfections.Results: Helminth prevalence was 88.6%, with Schistosoma mansoni being the most common (76.3%), followed by Hymenolepis(� Rodentolepis) nana (31.6%). Soil-transmitted helminths, including Trichuris trichiura and Ascaris lumbricoides, each afected14% of participants. It should be noted that 5.3% of participants tested positive for Taenia solium. Undernutrition afected 66.7%of participants, with 58.8% sufering from stunting and 22.8% from wasting. Stunting was more likely in participants withA. lumbricoides. Risk factors for S. mansoni included being over 9 years old and working in rice felds. Not washing fruits andvegetables before eating and contact with pigs were related to A. lumbricoides infections. Clinical symptoms, such as abdominaldistension and pain, were associated with S. mansoni infection.Conclusions: Te prevalence rates of schistosomiasis and soil-transmitted helminthiases, highlighting S. mansoni, and its co-existence with undernutrition in the same population, are alarming. Tese fndings underscore the urgent need to intensifycurrent control strategies, which include deworming, provision of clean water, implementation of sewage systems and educationon sanitation and hygiene.
