Update on cases of Legionnaires' disease
The Centre for Health Protection (CHP) of the Department of Health today (October 7) 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 September 29 to October 5, the CHP recorded two community-acquired LD cases:
A male patient, aged 73 with underlying illnesses, who lives in North District; and
A male patient, aged 55 with underlying illnesses, who lives in Southern District.
"Epidemiological investigations are ongoing to identify potential sources of infection, high-risk exposure and clusters, if any," a spokesman for the CHP said.
As of October 5, 89 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:
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) 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.
HAD opens temporary heat shelters
The Home Affairs Department will continue to open 19 community halls/community centres as temporary heat shelters today (October 7).
The temporary heat shelters will remain open for people to take refuge from the heat when the Very Hot Weather Warning is in force. From 10.30pm to 8am the next day, the temporary heat shelters will also provide bedding and a sleeping place for people in need. The shelters are manned by duty attendants.
For further information, please call the department's hotline before midnight on 2572 8427.
The heat shelters are located at:
Hong Kong Island:
---------------------
Central and Western -
Sai Ying Pun Community Complex Community Hall
3/F, Sai Ying Pun Community Complex
2 High Street, Sai Ying Pun
Eastern -
Causeway Bay Community Centre
3/F, 7 Fook Yum Road, Causeway Bay
Southern -
Lei Tung Community Hall
Lei Tung Estate, Ap Lei Chau
Wan Chai -
Wan Chai Activities Centre
LG/F, Wan Chai Market, 258 Queen's Road East, Wan Chai
Kowloon Districts:
------------------
Kowloon City -
Hung Hom Community Hall
1/F, Kowloon City Government Offices
42 Bailey Street, Hung Hom
Kwun Tong -
Lam Tin (West) Estate Community Centre
71 Kai Tin Road, Lam Tin
Sham Shui Po -
Shek Kip Mei Community Hall
G/F, Block 42, Shek Kip Mei Estate, Sham Shui Po
Wong Tai Sin -
Tsz Wan Shan (South) Estate Community Centre
45 Wan Wah Street, Tsz Wan Shan
Yau Tsim Mong -
Henry G Leong Yaumatei Community Centre
60 Public Square Street, Yau Ma Tei
New Territories Districts:
--------------------------
Islands -
Tung Chung Community Hall
G/F, Tung Chung Municipal Services Building, 39 Man Tung Road, Tung Chung
Kwai Tsing -
Kwai Shing Community Hall
Podium, Block 6, Kwai Shing West Estate, Kwai Chung
North -
Cheung Wah Community Hall
Cheung Wah Estate, Fanling
Sai Kung -
Hang Hau Community Hall
G/F, Sai Kung Tseung Kwan O Government Complex, 38 Pui Shing Road, Hang Hau, Tseung Kwan O
Sha Tin -
Lung Hang Estate Community Centre
Lung Hang Estate, Sha Tin
Tai Po -
Tai Po Community Centre
2 Heung Sze Wui Street, Tai Po
Tsuen Wan -
Lei Muk Shue Community Hall
G/F, Hong Shue House, Lei Muk Shue Estate, Tsuen Wan
Tuen Mun -
Butterfly Bay Community Centre
Butterfly Estate (near Tip Sum House), Tuen Mun
Yuen Long -
Long Ping Community Hall
Long Ping Estate, Yuen Long
Yuen Long -
Tin Yiu Community Centre
Tin Yiu Estate, Tin Shui Wai
In addition to the above heat shelters, a number of community halls/community centres can also be used for taking refuge from the heat during their operating hours. For their address details, please browse the following document:www.had.gov.hk/file_manager/en/documents/public_services/emergency_services/List_CH_CC_Day_E.pdf.
