Epidemiology of Colorado Tick Fever in Montana, Utah, and Wyoming, 1995-2003
Epidemiology of Colorado Tick Fever in Montana, Utah, and Wyoming, 1995-2003
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DOI：
10.1089/vbz.2009.0065
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发表时间：
2010-05-01
影响因子：
2.1
通讯作者：
Campbell, Grant L.
中科院分区：
文献类型：
--
作者：
Brackney, Monica M.;Marfin, Anthony A.;Campbell, Grant L.
科罗拉多蜱热（CTF）是一种由Coltivirus引起的双相发热性疾病，由美国西部和加拿大的落基山木蜱Dermacentor andersoni传播。症状通常包括急性发热、头痛、寒战和肌痛;疾病通常持续3周或更长时间。从蒙大拿州、犹他州和怀俄明州的公共卫生部门记录以及疾病控制和预防中心的诊断实验室记录中确定了经证实的CTF病例。其他描述性流行病学数据通过病历摘要获得。从1995年至2003年，共发现91例病例，总的年发病率为每1 000 000人2.7例。在9年的研究期间，年发病率下降。男性的发病率是女性的2.5倍。发病率最高的是51 - 70岁的人。在90%的病例中报告了发病前的蜱暴露，其中可获得更详细的病史。最常见的症状是发热、头痛和肌痛; 18%的病例患者住院治疗。虽然CTF病例的公认发病率总体下降，但下降的原因尚不清楚。可能包括监测强度的降低和发病率的真正下降。随着越来越多的人继续访问，移动到流行地区和工作，CTF应考虑在流行地区蜱暴露后出现发热性疾病的任何人。提高对疾病和蜱虫预防信息的认识应成为公共卫生措施的一部分，以进一步降低疾病的发病率。
Colorado tick fever (CTF) is a biphasic, febrile illness caused by a Coltivirus and transmitted by the Rocky Mountain wood tick, Dermacentor andersoni, in the western United States and Canada. Symptoms generally include acute onset of fever, headache, chills, and myalgias; illness often lasts for 3 weeks or more. Laboratory-confirmed cases of CTF were identified from public health department records in Montana, Utah, and Wyoming, and from the Centers for Disease Control and Prevention diagnostic laboratory records. Additional descriptive epidemiologic data were obtained by medical record abstraction. Ninety-one cases were identified from 1995 to 2003, resulting in an overall annual incidence of 2.7 per 1,000,000 population. The annual incidence decreased over the 9-year study period. Cases were 2.5 times more frequent in males than females. The highest incidence of cases occurred in persons aged 51-70. Tick exposure prior to illness onset was reported in 90% of the cases in which a more detailed history was available. The most common symptoms were fever, headache, and myalgia; 18% of the case patients were hospitalized. While there has been an overall decline in the recognized incidence of CTF cases, the reasons for the decline are unknown. Possibilities include a reduced intensity of surveillance and a true decrease in incidence. As more people continue to visit, move to and work in endemic areas, CTF should be considered in anyone presenting with a febrile illness following tick exposure in an endemic area. Heightened awareness for the disease and tick prevention messages should be part of public health measures to further decrease the incidence of disease.