Fig. 3From: Current high prevalences of Strongyloides stercoralis and Opisthorchis viverrini infections in rural communities in northeast Thailand and associated risk factorsGeographic characteristics of Samran (SR) and Bueng Niam (BN) sub-districts; a and c show the geographic characteristics of the SR sub-district during the rainy season, b and d show the geographic characteristics of the BN sub-district during the rainy seasonBack to article page