Linsuwanon Piyada, Krairojananan Panadda, Rodkvamtook Wuttikon, Leepitakrat Surachai, Davidson Silas, Wanja Elizabeth
Department of Entomology, US Army Medical Directorate, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand.
US Army Med Dep J. 2018 Jan-Jun(1-18):29-39.
We report findings of field surveillance for disease vectors and the prevalence of Orientia tsutsugamushi, the causative agent for scrub typhus, and other Rickettsial species that cause murine typhus and spotted fever group rickettsioses, in chigger mites and small rodents; and Leptospira in rodent kidney, urine, and environmental water samples. The study sites included various Royal Thai Army military installations and other training sites, and surrounding areas where the multinational military training exercise Cobra Gold was conducted in Thailand in 2017 and 2018. The overall prevalence of O. tsutsugamushi and Rickettsia infection in chiggers was 1.3% (20/1,594) and 7.5% (119/1,594), respectively. Serum samples of the captured rodents indicated previous exposure to O. tsutsugamushi infection with a seropositive rate of 12.2%. Leptospira species were isolated from rodent kidneys and water samples collected from catchment areas as well as tap water used for hand washing. Findings from this surveillance are important in determining the potential for scrub typhus, rickettsioses, and leptospirosis risk to military and US government personnel, as well as for informing regional and combatant commanders for prevention, correct diagnosis, prompt treatment, and timely and focused implementation of vector control and personal protective measures.
我们报告了对恙螨和小型啮齿动物中疾病媒介、恙虫病东方体（恙虫病病原体）以及其他引起鼠型斑疹伤寒和斑点热群立克次体病的立克次体物种的现场监测结果；以及在啮齿动物肾脏、尿液和环境水样中钩端螺旋体的监测结果。研究地点包括泰国皇家军队的各个军事设施和其他训练场地，以及2017年和2018年在泰国举行多国军事训练演习“金色眼镜蛇”的周边地区。恙螨中恙虫病东方体和立克次体感染的总体患病率分别为1.3%（20/1594）和7.5%（119/1594）。捕获啮齿动物的血清样本表明先前暴露于恙虫病东方体感染，血清阳性率为12.2%。从啮齿动物肾脏以及从集水区采集的水样和用于洗手的自来水中分离出钩端螺旋体物种。此次监测结果对于确定恙虫病、立克次体病和钩端螺旋体病对军事人员和美国政府人员的潜在风险很重要，也有助于为地区和作战指挥官提供信息，以便他们进行预防、正确诊断、及时治疗以及及时且有针对性地实施病媒控制和个人防护措施。
