CDC报告：蒙大拿州米苏拉县无家可归者侵袭性A组链球菌发病率约为普通人群100倍
美国疾病控制与预防中心（CDC）10月29日发表在《发病率与死亡率周报》（MMWR）的一项调查显示，蒙大拿州米苏拉县（Missoula County, Montana）无家可归人群的侵袭性A组链球菌（GAS）感染发病率，约为普通人群的100倍。
调查覆盖2024年7月27日至2025年9月20日。米苏拉县通过常规监测与强化监测共确认69例A组链球菌感染病例，其中39例（占57%）发生在36名无家可归者身上，包括3例再次感染。
这39例中，有18例（占46%）是通过强化监测才被识别出来的：强化监测在病例资料中增加了住房状况数据，使卫生部门能把感染与无家可归状态关联起来。
在无家可归感染者中，15人因侵袭性A组链球菌感染住院，1人死亡。报告作者、贝丝·霍普金斯（Beth Hopkins）等公共卫生人员指出，把住房状况纳入常规监测数据，有助于卫生部门发现并回应在一般统计中不易见的高风险人群疫情。
该报告刊于MMWR 2026年第75卷第42期，页626至629，文献编号10.15585/mmwr.mm7542a1。
CDC: Invasive Group A Streptococcus Incidence Among People Experiencing Homelessness in Missoula County, Montana, Was About 100 Times That of the General Population
An investigation published by the U.S. Centers for Disease Control and Prevention (CDC) in Morbidity and Mortality Weekly Report (MMWR) on October 29 found that the incidence of invasive group A Streptococcus (GAS) infections among people experiencing homelessness in Missoula County, Montana, was about 100 times that of the general population.
The investigation covered July 27, 2024 through September 20, 2025. Missoula County identified 69 GAS cases through routine and enhanced surveillance, of which 39 cases (57 percent), including three reinfections, occurred among 36 persons experiencing homelessness.
Of those 39 cases, 18 (46 percent) were identified only through enhanced surveillance, which added housing-status data to case records and allowed health officials to link infections to homelessness.
Among the patients experiencing homelessness, 15 were hospitalized with invasive GAS disease and one died. Lead author Beth Hopkins, MPH, and colleagues wrote that incorporating housing status into routine surveillance data helps health departments detect and respond to outbreaks in high-risk populations that general statistics may miss.
The report appears in MMWR 2026;75(42):626-629 (DOI: 10.15585/mmwr.mm7542a1).
来源：GSM·美国（原文链接）
图片来源：A 组链球菌显微图像（资料图）。美国疾病控制与预防中心（CDC）公共卫生图像库，公共领域，经 Wikimedia Commons。 / Streptococcus pyogenes micrograph (file image). CDC Public Health Image Library, public domain, via Wikimedia Commons.
