Update on cases of Legionnaires' disease
The Centre for Health Protection (CHP) of the Department of Health today (August 5) reported the latest number of cases of Legionnaires' disease (LD), and stressed the importance of using and maintaining properly designed man-made water systems, adding that susceptible groups should strictly observe relevant precautions.
From July 28 to August 3, the CHP recorded one imported LD case and one community-acquired LD case:
Epidemiological investigations are ongoing to identify potential sources of infection, high-risk exposure and clusters, if any.
Furthermore, the CHP is investigating a case of LD in Gleneagles Hospital Hong Kong. The male patient, aged 82 with underlying illnesses, was admitted to Gleneagles Hospital Hong Kong on July 8 after receiving a surgery at Kwong Wah Hospital on June 27. He presented with lethargy and cough on July 26, and he developed a fever starting July 28. He was transferred to Kwong Wah Hospital for further management on July 30 due to persistent fever and deteriorated condition. His clinical diagnosis was pneumonia and he is currently in stable condition.
His sputum specimen tested positive for Legionella species upon laboratory testing. Initial enquiries revealed that the patient stayed at Gleneagles Hospital Hong Kong without any travel history during the incubation period.
"Epidemiological investigations with Gleneagles Hospital Hong Kong are ongoing to identify potential sources of infection, high-risk exposure and clusters, if any. Relevant water samples and environmental swabs were collected from potential sources for laboratory testing," a spokesman for the CHP said.
Tracing of contacts including staff and in-patients in the relevant ward is ongoing, and those identified will be put under medical surveillance. The CHP has provided health advice against LD to staff and in-patients, including those with weakened immunity who should use sterile or boiled water for drinking, tooth brushing and mouth rinsing. An investigation is ongoing.
As of August 3, 62 LD cases had been recorded this year. In 2023 and 2022, there were 121 and 80 cases respectively.
"Men, people aged over 50, smokers, alcoholics and persons with weakened immunity are more susceptible to LD. Some situations may also increase the risk of infection, including poor maintenance of water systems; living in areas with old water systems, cooling towers or fountains; using electric water heaters, whirlpools and spas or hot water spring spas; and recent stays in hotels or vessels," the spokesman said.
Legionellae are found in various environmental settings and grow well in warm water (20 to 45 degrees Celsius). They can be found in aqueous environments such as water tanks, hot and cold water systems, cooling towers, whirlpools and spas, water fountains and home apparatus that support breathing. People may become infected when they breathe in contaminated droplets (aerosols) and mist generated by artificial water systems, or when handling garden soil, compost and potting mixes.
Immunocompromised persons should:
The public should observe the health advice below:
The public may visit the CHP'sLD page, theCode of Practice for Prevention of LDand theHousekeeping Guidelines for Cold and Hot Water Systems for Building Managementof the Prevention of LD Committee, and the CHP'srisk-based strategyfor prevention and control of LD.
Source: AI-generated images
