Amorn LekklaChantira SutthikornchaiSomchai BovornkittiYaowalark SukthanaMahidol University2018-06-212018-06-212005-12-01The Southeast Asian journal of tropical medicine and public health.. Vol.36 Suppl 4, (2005), 5-9012515622-s2.0-33646174118https://repository.li.mahidol.ac.th/handle/20.500.14594/16662Thermo tolerant free-living ameba, Naegleria spp and Acanthamoeba spp contamination in natural hot springs in Thailand were carried out from 13 provinces. The temperature of hot springs water varied from 28 degrees-65 degrees C and pH from 6-8. We found that 38.2 % (26/68) of water samples were positive, Acanthamoeba was 13.2% (9/68) whilst Naegleria was 35.3% (24/68). Contamination by free-living ameba in natural hot springs may pose a significant health risk to people who use such water for recreation activities.Mahidol UniversityMedicineArticleSCOPUS