Dengue Branch, Centers for Disease Control and Prevention, San Juan, Puerto Rico.
Arboviral Diseases Branch, Centers for Disease Control and Prevention, Fort Collins, Colorado.
Am J Trop Med Hyg. 2019 Oct;101(4):884-890. doi: 10.4269/ajtmh.19-0309.
Dengue, chikungunya, and Zika viruses, primarily transmitted by species mosquitoes, have caused large outbreaks in the Americas, leading to travel-associated cases and local mosquito-borne transmission in the United States. We describe the epidemiology of dengue, chikungunya, and noncongenital Zika virus disease cases reported from U.S. states and territories in 2017, including 971 dengue cases, 195 chikungunya cases, and 1,118 Zika virus disease cases. Cases of all three diseases reported from the territories were reported as resulting from local mosquito-borne transmission. Cases reported from the states were primarily among travelers, with only seven locally acquired mosquito-transmitted Zika virus disease cases reported from Texas ( = 5) and Florida ( = 2). In the territories, most dengue cases ( = 508, 98%) were reported from American Samoa, whereas the majority of chikungunya ( = 39, 100%) and Zika virus disease ( = 620, 93%) cases were reported from Puerto Rico. Temporally, the highest number of Zika virus disease cases occurred at the beginning of the year, followed by a sharp decline, mirroring decreasing case numbers across the Americas following large outbreaks in 2015 and 2016. Dengue and chikungunya cases followed a more seasonal pattern, with higher case numbers from July through September. Travelers to the United States and residents of areas with active virus transmission should be informed of both the ongoing risk from dengue, chikungunya, and Zika virus disease and personal protective measures to lower their risk of mosquito bites and to help prevent the spread of these diseases.
登革热、基孔肯雅热和寨卡病毒主要由 Aedes 蚊种传播，已在美洲造成大规模暴发，导致美国出现与旅行相关的病例和本地蚊媒传播。我们描述了 2017 年美国各州和领地报告的登革热、基孔肯雅热和非先天性寨卡病毒病病例的流行病学情况，包括 971 例登革热病例、195 例基孔肯雅热病例和 1118 例寨卡病毒病病例。从各领土报告的所有三种疾病的病例均报告为本地蚊媒传播所致。从各州报告的病例主要是旅行者，只有德克萨斯州（5 例）和佛罗里达州（2 例）报告了 7 例本地获得性蚊媒传播的寨卡病毒病病例。在各领地，大多数登革热病例（508 例，98%）来自美属萨摩亚，而大多数基孔肯雅热（39 例，100%）和寨卡病毒病（620 例，93%）病例来自波多黎各。就时间而言，寨卡病毒病病例数量最多发生在年初，随后急剧下降，与 2015 年和 2016 年大暴发后美洲各地病例数量减少的情况相吻合。登革热和基孔肯雅热病例呈现更季节性的模式，7 月至 9 月病例数较高。前往美国的旅行者和有病毒活跃传播地区的居民应了解登革热、基孔肯雅热和寨卡病毒病的持续风险以及降低被蚊子叮咬风险的个人保护措施，以帮助预防这些疾病的传播。
