CHP investigates dengue fever cluster involving 16-year-old teenager and 43-year-old man, 3 others develop symptoms

296

8th December 2023 – (Hong Kong) The Centre for Health Protection (CHP) under the Department of Health has initiated an investigation into a cluster of dengue fever (DF) involving two epidemiologically linked imported cases, underscoring the critical need for stringent environmental hygiene, mosquito control, and personal protective measures, both locally and during travel.

The first case pertains to a 16-year-old male patient with no significant medical history. He began experiencing malaise, musculoskeletal pain, and fever since 29th November, subsequently developing a rash over his chest and back. Following his admission to Queen Mary Hospital on 30th November, he is currently in stable condition, with laboratory testing confirming the presence of dengue virus in his blood sample.

Preliminary investigations uncovered that the patient had participated in a study tour in Thailand from 19th to 24th November, during which he stayed at a rural resort and engaged in hiking activities in the forest, recalling mosquito bites during the excursion.

The second case involves a 43-year-old male patient with no significant medical history, who is related to the first patient through the study tour. He developed fever, myalgia, and rash since 26th November, seeking medical attention at private out-patient clinics on 28th November, 3rd and 4th December. Currently, he is in stable condition, with laboratory testing also confirming the presence of dengue virus in his blood sample.

The CHP has initiated epidemiological investigations concerning other participants of the study tour, with initial enquiries revealing that three additional participants are symptomatic. Ongoing investigations are in progress.

The CHP urges the public to remain vigilant, emphasising the importance of maintaining rigorous environmental hygiene, implementing effective mosquito control measures, and adopting personal protection strategies, both within Hong Kong and during travel.