Serological Survey of Spotted Fever Group Rickettsia in Wild Rats in Thailand in the 1970s

In Thailand, the first human cases of spotted fever group rickettsiosis were reported in 1994, but no serosurveys on wild rats have yet been conducted. We investigated the seroepidemiology in wild rats collected in the 1970s from two regions in Thailand, and found a 62.2% positive rate of antibodies...

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Bibliographic Details
Published in:MICROBIOLOGY and IMMUNOLOGY 1996, Vol.40(12), pp.895-898
Main Authors: Okabayashi, Tamaki, Tsutiya, Kimiyuki, Muramatsu, Yasukazu, Ueno, Hiroshi, Morita, Chiharu
Format: Article
Language:English
Subjects:
Animals
Antibodies, Bacterial - blood
Bandicota indica
Biological and medical sciences
Fluorescent Antibody Technique, Indirect
Fundamental and applied biological sciences. Psychology
Medically important nuisances and vectors, pests of stored products and materials: population survey and control
Muridae - immunology
Rickettsia - immunology
Rickettsia Infections - epidemiology
Rickettsia Infections - veterinary
Rickettsia japonica
Rodent Diseases - epidemiology
Seroepidemiologic Studies
Serological survey
Spotted fever group rickettsia
Thailand
Thailand - epidemiology
Tropical medicine
Vectors. Intermediate hosts
Wild rats
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Summary:In Thailand, the first human cases of spotted fever group rickettsiosis were reported in 1994, but no serosurveys on wild rats have yet been conducted. We investigated the seroepidemiology in wild rats collected in the 1970s from two regions in Thailand, and found a 62.2% positive rate of antibodies for spotted fever group rickettsia (SFGR) by the indirect immunofluorescence antibody test. Of the antibody-positive rats, 82.2% had higher titers of antibodies against TT-118 than those against Rickettsia japonica, which suggests that Thailand is infested mainly with the TT-118 strain or its antigenically related organisms. The prevalence of antibodies in Bandicota indica was significantly higher than that in other species, which suggests that B. indica is important as a reservoir of SFGR in Thailand.
ISSN:0385-5600
1348-0421
DOI:10.1111/j.1348-0421.1996.tb01157.x