美属萨摩亚登革热疫情确认1048例、371人住院，CDC称岛上检测首次派上用场
位于南太平洋的美属萨摩亚暴发登革热疫情，美国疾病控制与预防中心 CDC 2026年11月12日刊发的《发病率与死亡率周报》报告说，2025年6月至2026年8月间，当地共确认1,048例登革热病例，371人住院，没有人死亡。这场疫情在2025年7月宣告暴发，是美属萨摩亚首次用上岛上确诊检测的一次疫情。
报告说，病例多数是20岁以下的人，共814例，占78%，男性650例，占62%。发病率最高的是10至14岁儿童，每1万人中有652例。全部病例中，95%是在本地感染，只有49例与旅行有关。住院人数在2025年12月达到高峰，单周最多19人入院，住院中位时长为4天。
在完成血清分型的146例病例中，136例是登革病毒1型，占93%，其余10例是2型。当地76个村庄中有54个报告了至少1例病例，人口最多的 Tafuna 村病例最多，共152例，占15%。2026年2月15日之后没有再发现旅行相关病例，病例数在2026年2月至8月持续下降。
应对方面，美属萨摩亚卫生部门在2025年7月发布登革热健康警报，提醒居民防蚊并留意旅行后症状。由于岛上已有实验室确诊检测，第一批病例在数天内就得到确认，不像以往疫情要把样本送到 Hawaii 检测、等上数周。2025年8月，CDC 工作人员为当地医护人员做了登革热临床管理培训，医院也更新了 surge 应对方案。
当地环保部门牵头开展社区清理，减少埃及伊蚊的滋生地，把约250大车家庭废弃物运往市政垃圾填埋场。卫生部门对52家托儿所、33所公立学校、13所私立学校、11个政府办公室、6家社区卫生中心、5座教堂、1家私营企业和医院做了滞留喷洒，并向患者家庭及周边住户提供室内外喷洒。报告说，岛上实验室检测可以作为今后登革热疫情中确认感染、快速部署防控工具的有效办法。
Dengue Outbreak in American Samoa Reached 1,048 Confirmed Cases With 371 Hospitalizations, CDC Reports
A dengue outbreak in American Samoa, a U.S. territory in the South Pacific, resulted in 1,048 confirmed cases and 371 hospitalizations between June 2025 and August 2026, with no deaths, the Centers for Disease Control and Prevention reported in its Morbidity and Mortality Weekly Report published on November 12, 2026. The outbreak was declared in July 2025 and was the first in American Samoa to benefit from on-island confirmatory testing.
The majority of cases occurred among persons aged under 20 years, with 814 cases, or 78%, and among males, with 650 cases, or 62%. Incidence was highest among children aged 10 to 14 years, at 652 cases per 10,000 population. Overall, 999 cases, or 95%, were locally acquired, and only 49 were travel associated. A total of 371 patients, or 35%, required hospitalization, with weekly admissions peaking in December 2025 at 19, and a median hospital stay of 4 days.
Among 146 serotyped cases, dengue virus 1 was identified in 136, or 93%, and dengue virus 2 in 10. Among American Samoa's 76 villages, 54 reported at least one case, with the highest number, 152 cases or 15%, in Tafuna, the most populous village.
In July 2025, the American Samoa Department of Health issued a dengue health alert with recommendations for preventing mosquito bites while traveling and monitoring symptoms after returning. Because diagnostic testing was available on the island, the first cases were confirmed within days rather than weeks, as in previous outbreaks when samples had to be transported to Hawaii. In August 2025, CDC staff provided dengue clinical management training to local health care professionals, and hospital administrators updated their surge plan.
The American Samoa Environmental Protection Agency led community cleanup campaigns to reduce Aedes mosquito breeding sites, transporting approximately 250 large loads of household waste to the municipal landfill. Health officials sprayed residual insecticide at day care centers, public and private schools, government offices, community health centers, churches, a private business and the hospital, and offered indoor and outdoor spraying to households of patients and nearby neighbors. The report said on-island laboratory testing can be considered an effective strategy to confirm infections and guide rapid deployment of vector control tools in future outbreaks.
来源：疾病控制与预防中心
发布：GSM·美国（发布链接）
图片来源：图：疾病控制与预防中心 CDC 总部大楼（联邦固定图库）。 / Photo: CDC headquarters building (federal asset library).
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