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Two new Legionnaires' disease cases reported; public urged to maintain water systems and follow health precautions.

HK

Two new Legionnaires' disease cases reported; public urged to maintain water systems and follow health precautions.
HK

HK

Two new Legionnaires' disease cases reported; public urged to maintain water systems and follow health precautions.

2026-03-23 17:30 Last Updated At:17:38

DH announces latest situation regarding Legionnaires' disease case

The Centre for Health Protection (CHP) of the Department of Health (DH) today (March 23) reported the latest number of Legionnaires' disease (LD) cases, and reminded the public of the importance of using and maintaining properly designed man-made water systems, adding that susceptible groups should strictly observe relevant precautions.

From March 15 to 21, the CHP recorded two community-acquired LD cases, involving two male patients with underlying illnesses. The details are as follows:

1. a 73-year-old patient living in Kowloon City District; and

2. a 79-year-old patient living in Eastern District.

The CHP is conducting epidemiological investigations to identify the potential sources of infection and high-risk exposure. An initial investigation revealed that these are sporadic cases. No epidemiological linkages have been established between the two cases and other confirmed cases previously recorded in Hong Kong.

As of March 21, 16 LD cases had been recorded this year. In 2025 and 2024, there were 167 and 135 LD 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, whirlpool spas or hot water spring spas; and recent stays in hotels or ships.

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, whirlpool spas, water fountains, humidifiers and home respiratory devices 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:

  • Use sterile or boiled water for drinking, tooth brushing and mouth rinsing;
  • Avoid using humidifiers, or other mist- or aerosol-generating devices; and
  • If using humidifiers, or other mist- or aerosol-generating devices, fill the water tank with only sterile or cooled freshly boiled water, and not water directly from the tap. Also, clean and maintain humidifiers/devices regularly according to manufacturers' instructions. Never leave stagnant water in a humidifier/device. Empty the water tank, wipe all surfaces dry, and change the water daily.
  • The public should observe the health advice below:

  • Observe personal hygiene;
  • Do not smoke and avoid alcohol consumption;
  • Strainers in water taps and shower heads should be inspected, cleaned, descaled and disinfected regularly or at a frequency recommended by the manufacturer;
  • If a fresh-water plumbing system is properly maintained, it is not necessary to install domestic water filters. Use of water filters is not encouraged as clogging occurs easily, which can promote growth of micro-organisms. In case water filters are used, the pore size should be 0.2 micrometres (µm) or less and the filter needs to be changed periodically according to the manufacturer's recommendations;
  • Drain and clean water tanks of buildings at least quarterly;
  • Drain or purge for at least one minute infrequently used water outlets (e.g. water taps, shower heads and hot water outlets) and stagnant points of the pipework weekly or before use;
  • Seek and follow doctors' professional advice regarding the use and maintenance of home respiratory devices and use only sterile water (not distilled or tap water) to clean and fill the reservoir. Clean and maintain the device regularly according to the manufacturer's instructions. After cleaning/disinfection, rinse the device with sterile water, cooled freshly boiled water or water filtered with 0.2 µm filters. Never leave stagnant water in the device. Empty the water tank, keep all surfaces dry, and change the water daily; and
  • When handling garden soil, compost and potting mixes:
  • Wear gloves and a face mask;
  • Water gardens and compost gently using low pressure;
  • Open composted potting mixes slowly and make sure the opening is directed away from the face;
  • Wet the soil to reduce dust when potting plants; and
  • Avoid working in poorly ventilated places such as enclosed greenhouses.
  • 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.

    Additionally, as smokers and alcoholics are more susceptible to LD, the Government urgesmembers of the public to quit smoking and avoid drinking. Members of the public may call the DH Integrated Smoking Cessation Hotline at 1833 183, which is answered by registered nurses who provide professional counselling and referral to a wide range of free smoking cessation services. The public may also visit the smoking cessation thematic website (www.livetobaccofree.hk) for more information on smoking cessation. The DH has also launched the Pilot Alcohol Cessation Counselling Service, which provides free counselling to people identified as having probable alcohol dependence, through a subvented non-governmental organisation, the Tung Wah Group of Hospitals (TWGHs). Information on the service has been uploaded to the DH'sChange for Healthwebsite. Eligible persons who are interested can call the enquiry hotline of the TWGHs (2884 9876).

    Source: AI-found images

    Source: AI-found images

    LegCo to debate motion on "Comprehensively reforming the complaints handling and disciplinary inquiry mechanism of the Medical Council of Hong Kong"

    The following is issued on behalf of the Legislative Council Secretariat:

    The Legislative Council (LegCo) will hold a meeting on Wednesday (March 25) at 11am in the Chamber of the LegCo Complex. During the meeting, Members will debate a motion on "Comprehensively reforming the complaints handling and disciplinary inquiry mechanism of the Medical Council of Hong Kong". The motion, moved by Ms Chan Hoi-yan, is set out in Appendix 1. Reverend Canon Peter Douglas Koon, Mr Nick Chan, Mr Jonathan Leung, Dr Chan Han-pan, Mr Tang Ka-piu and Dr Thomas So will move separate amendments to Ms Chan Hoi-yan's motion.

    Dr Elvin Lee will move a motion on "Aligning with the country's promulgation of the Regulation on Promoting Nationwide Reading to further strengthen Hong Kong's strategy and efforts to promote reading for all". The motion is set out in Appendix 2. Mr Kenneth Fok, Mr Albert Chuang, Dr Hoey Simon Lee, Mr Nick Chan, Professor Michael Ngai, Dr Junius Ho, Mr Yiu Pak-leung, Mr Lau Ka-keung and Professor William Wong will move separate amendments to Dr Elvin Lee's motion.

    Meanwhile, Mr Chan Chun-ying will move a motion under Rule 49E(2) of the Rules of Procedure to take note of a report of the House Committee on consideration of subsidiary legislation and other instruments. The motion is set out in Appendix 3.

    On Government motions, the Chief Secretary for Administration will move two proposed resolutions under the Legal Aid Ordinance relating to the adjustments to the financial eligibility limits for legal aid applicants and two specific amounts under the Director of Legal Aid's First Charge. The proposed resolutions are set out in Appendices 4 and 5 respectively.

    Members will also ask the Government 22 questions on various policy areas, six of which require oral replies.

    The agenda of the above meeting is available on the LegCo Website (www.legco.gov.hk). Members of the public can watch or listen to the meeting via the "Webcast" system on the LegCo Website. To observe the proceedings of the meeting at the LegCo Complex, members of the public may call 3919 3399 during office hours to reserve seats.

    Source: AI-found images

    Source: AI-found images

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