Leptospirosis among River Water Rafters in Satoon, Southern Thailand
Sarunyou Chusri MD*, Somporn Sritrairatchai MSc**, Thanaporn Hortiwahul MSc*, Boonsri Charoenmak BSc*, Khachornsakdi Silpapojakul MD*
Affiliation : * Department of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand ** Department of Pathology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand
Objective : To assess epidemiology and risk factors for leptospirosis infection among the rafting participants in southern
Thailand.
Material and Method: Prospective observation of the patients who participated in rafting in southern Thailand was conducted
between January and December 2010. Demographic, clinical data as well as potential risk factors were collected. Indirect
immunofl uorescent antibody test (IFAT) for specifi c leptospirosis IgG detection were examined immediately after rafting
and two to three weeks after fi rst samples. Microagglutination Test (MAT) was performed to confi rm diagnosis in cases with
seroconversion.
Results : One hundred fi fty eight rafting participants enrolled to the present study of which 150 complied with the protocol
and were analyzed. Eleven patients had serological evidence of leptospirosis infection accounting for 7.3% while only three
patients were symptomatic. Various serovars are responsible for infection while serovar Icterohemorrhagiae is most common.
Persistence of abrasion wound/ laceration wound were likely to be risk factors for infection with p < 0.05.
Conclusion : The laboratory fi ndings in the present study demonstrated that leptospirosis was associated with rafting and
a contaminated environment.
Keywords : Leptospirosis, Rafting, Southern Thailand
