Brophy Maureen K, Drexler Naomi A, Stone Nathan E, Busch Joseph D, Ballard Rebecca, Bourgeois Reanna M, Pemberton Grant L, Paddock Christopher D, Horiuchi Kalanthe, Biggerstaff Brad J, Blocher Bessie H, Kersh Gilbert J, Bendle Harty, Wagner David M, Nicholson William L, Salzer Johanna S
Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia.
Division of Foodborne, Waterborne, and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia.
Am J Trop Med Hyg. 2025 May 6;113(1):156-162. doi: 10.4269/ajtmh.24-0485. Print 2025 Jul 2.
Rocky Mountain spotted fever (RMSF) is a deadly tick-borne disease caused by the bacterium Rickettsia rickettsii. An ongoing epidemic of RMSF is affecting tribal communities in Arizona, with nearly 500 cases and 28 deaths since 2003. The San Carlos Apache Tribe has been consistently working to prevent RMSF using tick collars on dogs, pesticide treatments around homes, and increasing education for nearly a decade. Besides monitoring human disease levels and tick burden on dogs, we have little understanding of the long-term impact of prevention practices on tick abundance and infection rates in the peridomestic environment. We evaluated risk factors associated for tick infestation at home sites across the San Carlos Indian Reservation as well as R. rickettsii and Rickettsia massiliae prevalence in off-host ticks. Although the presence of fencing appears protective, the number of nearby structures is the most important risk factor associated with increased adult and nymphal tick abundance, highlighting the impact of a free-roaming dog population.
落基山斑疹热（RMSF）是一种由立氏立克次体引起的致命性蜱传疾病。一场持续的落基山斑疹热疫情正在影响亚利桑那州的部落社区，自2003年以来已有近500例病例和28人死亡。近十年来，圣卡洛斯阿帕奇部落一直在持续努力通过给狗佩戴蜱虫项圈、在房屋周围进行农药处理以及加强教育来预防落基山斑疹热。除了监测人类疾病水平和狗身上的蜱虫负担外，我们对预防措施对家庭周边环境中蜱虫数量和感染率的长期影响了解甚少。我们评估了圣卡洛斯印第安保留地各家庭住址蜱虫侵扰的相关风险因素，以及游离蜱中里氏立克次体和马赛立克次体的流行情况。虽然围栏的存在似乎具有保护作用，但附近建筑物的数量是与成年蜱和若蜱数量增加相关的最重要风险因素，这突出了自由放养犬类群体的影响。
