Wang Shan-shan, Huang Jia-liang, Su Jian-xin, Xi Yun-zhen, Wang Yan, Li Min-min
Center for Disease Control and Prevention of Guangzhou Command People's Liberation Army, Guangzhou 510507, China.
Zhonghua Liu Xing Bing Xue Za Zhi. 2007 Oct;28(10):996-9.
To study the increasing incidence and the characteristics of Tsutsugamushi disease in the areas of Nan Peng Lie islands, Nan Ao island, Wan Shan archipelago, Nao Zhou island and Lei Zhou peninsula, located in the southern part of China and to develop strategies for preventive measures.
Both epidemiological investigation, isolation and gene identification of Orientia tsutsugamushi, as well as pilot preventive measures were carried out.
These islands belonged to the epidemic area of south subtropical zone of Tsutsugamushi disease. The main host was Rattus norvegicu and the overall rates of infection on Orientia tsutsugamushi were 22.78%-33.75%. The main biological vector was Leptotrombidium (Leptotrombidium) deliens and the rates of infection on Orientia tsutsugamushi were 40.00%-75.00%. 25 strains of Orientia tsutsugamushi had been isolated from Rattus norvegicu and Leptotrombidium (Leptotrombidium) deliens. Results showed that the isolated strains of Orientia tsutsugamushi were 15 Karp, 8 Kato, 2 Yonchon. Results from serological studies showed that the positive rate of anti-Orientia tsutsugamushi antibodies was high, in both residents and soldiers stationed in these islands. On these islands, rats and biological vectors were killed. Results showed that these measures had positive impact in reducing the incidence.
Islands from the southern part of the country belonged to the epidemic area of Tsutsugamushi disease. People visiting this areas should be under protection.
研究中国南部南澎列岛、南澳岛、万山群岛、硇洲岛及雷州半岛恙虫病发病率上升情况及特征，并制定预防措施策略。
开展流行病学调查、恙虫病东方体分离与基因鉴定以及预防措施试点。
这些岛屿属于恙虫病南亚热带流行区。主要宿主为褐家鼠，恙虫病东方体总体感染率为22.78% - 33.75%。主要生物媒介为地里纤恙螨，恙虫病东方体感染率为40.00% - 75.00%。已从褐家鼠和地里纤恙螨中分离出25株恙虫病东方体。结果显示，分离出的恙虫病东方体菌株有15株Karp型、8株Kato型、2株Yonchon型。血清学研究结果表明，这些岛屿居民和驻军抗恙虫病东方体抗体阳性率较高。在这些岛屿上，对鼠类和生物媒介进行了杀灭。结果表明这些措施对降低发病率有积极影响。
该国南部岛屿属于恙虫病流行区。前往该地区的人员应受到保护。
