Chiu Kelvin Hei-Yeung, Li Xin, Wong Shuk-Ching, Chen Jonathan Hon-Kwan, Tsang Alan Ka-Lun, Chan Betsy Wai-Ka, Poon Rosana Wing-Shan, Yip Cyril Chik-Yan, Leung Sally Sau-Man, So Simon Yung-Chun, Didik Tiffany, Ng Michael Yuey-Zhun, Hui Tsz-Yung, Chiu Edwin Kwan-Yeung, Wong Peter Wai-Ching, Wong Hoi-Kei, Wong Sally Cheuk-Ying, Lung David Christopher, Chuang Shuk-Kwan, Au Albert Ka-Wing, Lo Janice Yee-Chi, Yuen Kwok-Yung, Cheng Vincent Chi-Chung
Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, People's Republic of China.
Department of Microbiology, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China.
Emerg Microbes Infect. 2025 Dec;14(1):2539194. doi: 10.1080/22221751.2025.2539194. Epub 2025 Aug 10.
In 2022, an outbreak of melioidosis occurred at a highly urbanized district (the SSP district) in Hong Kong. There was a 5-fold increase in cases compared to the average number of cases in the preceding years, with the SSP district accounting for 71.1% of the cases. A total of 568 environmental specimens were collected, including 290 environmental samples and 38 air samples from the freshwater service reservoirs (FWSRs), 16 water samples, and 224 environmental samples from the households of infected cases. was cultured from 24 (10.7%) soil samples obtained from the lawn overlying the FWSRs supplying the SSP district or from the surroundings of the air vents used for pressure equalization in the FWSRs. These culture isolates from soil have the same genotype ST-1996 as the patients' isolates. As DNA was also detected from the swabs collected from the internal roofs of the FWSRs and inside the water tap at the home of an infected case, the chlorine concentration at the upstream treatment plant outlet was increased from 1 to 1.2 ppm as a precautionary measure. The number and proportion of newly diagnosed melioidosis cases from the SSP district significantly reduced from 32 (71.1%) in 2022 to 6 (35.3%) in 2023 ( = 0.018).
2022年，香港一个高度城市化地区（南区）发生了类鼻疽病疫情。与前几年的平均病例数相比，病例数增加了5倍，南区的病例占总数的71.1%。共采集了568份环境样本，包括290份环境样品、来自淡水服务水库（FWSRs）的38份空气样本、16份水样以及来自感染病例家庭的224份环境样本。从供应南区的FWSRs上方草坪或FWSRs中用于均压的通风口周围采集的24份（10.7%）土壤样本中培养出了[病原体名称未给出]。这些从土壤中培养出的分离株与患者分离株具有相同的基因型ST - 1996。由于在FWSRs内部屋顶和一名感染病例家中水龙头内部采集的拭子中也检测到了[病原体名称未给出]DNA，作为预防措施，上游处理厂出水口的氯浓度从1 ppm提高到了1.2 ppm。南区新诊断的类鼻疽病病例数量和比例从2022年的32例（71.1%）显著降至2023年的6例（35.3%）（P = 0.018）。
