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Transovarial Transmission of Orientia tsutsugamushi in Leptotrombidium palpale (Acari: Trombiculidae) |
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| Authors: | Eun Hee Shin Jong Yul Roh Won Il Park Bong Gu Song Kyu-Sik Chang Wook-Gyo Lee Hee Il Lee Chan Park Mi-Yeoun Park E-Hyun Shin |
| Institution: | 1. Division of Medical Entomology, Center for Immunology and Pathology, Korea National Institute of Health, Cheongwon, South Korea.; 2. Division of Biosafety Evaluation and Control, Korea National Institute of Health, Cheongwon, South Korea.; 3. Division of Arboviruses, Center for Immunology and Pathology, Korea National Institute of Health, Cheongwon, South Korea.; University of Texas Medical Branch, United States of America, |
| Abstract: | Transovarial transmission of Orientia tsutsugamushi in colonies of Leptotrombidium palpale was studied in the parent and F1 and F2 generations. Both transovarial transmission and filial infection rates were 100% in the parent and F1 generations of Leptotrombidium palpale. The filial infection rate in the F1 generation was 100%, but it declined to 94.3% in the F2 progeny. The sex ratio of the F1 generation from infected L. palpale was 1∶0.8 (male:female) and the proportion of males was relatively high. This study is the first to report on the transovarial transmission of O. tsutsugamushi in L. palpale. High transovarial transmission rates in L. palpale suggest that this species might be one of the major vectors of tsutsugamushi disease in Korea. |
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