Affiliations: *Miscellaneous Bacteriology Section and
**Parasitology Section, National Institute of Health, Department of Medical Science, Moinistry of Public Health
***Provincal Public Health Office, Mae Hong Son Province
****Academy of Science, The Royal Institute, Bangkok
Source: Journal of Health Science 2004; 13: 27-31
Water specimens were taken from 18 natural hot springs in four nortern provinces of Thailand, namely, Mae Hong Son, Chiang Mai, Chiang Rai, Lampang, and sent to the laboratories of the National Institute of Health, Department of Medical Science, Moinistry of Public Health in Nonthaburi for determining the presence of the legionella organism and free-living ameba. Legionella pneumophila serogroup 6 was isolated from a water specimen collected in Mae Hong Son province; ameba was not isolated from any of the specimens. There was a clue suggesting that temperatures of the hot spring water might play an influential role in the existence of viable pathogenic organisms.