Abstract：
An outbreak of hepatitis A is ongoing in Portugal, with 71 confirmed cases from 7 October 2023 to 24 April 2024. Most cases are male, aged 18-44 years, with many identifying as men who have sex with men (MSM) and reported as suspected sexual transmission. Phylogenetic analysis identified the subgenotype IA, VRD 521-2016 strain, last observed in an MSM-associated multi-country outbreak in 2016 to 2018. We wish to alert colleagues in other countries to investigate potential similar spread.
摘要：
葡萄牙正在爆发甲型肝炎疫情,2023年10月7日至2024年4月24日，71例确诊病例。大多数病例是男性,18-44岁,许多人被认定为男男性行为者(MSM)，并报告为疑似性传播。系统发育分析确定了IA亚型，VRD521-2016菌株，最后一次在2016年至2018年与MSM相关的多国疫情中观察到。我们希望提醒其他国家的同事调查潜在的类似传播。
