Update on cases of Legionnaires' disease
The Centre for Health Protection (CHP) of the Department of Health today (September 9) 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 1 to 7, the CHP recorded three community-acquired LD cases and one imported LD case:
"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 September 7, 78 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
CHP reminds public on precautions against heat stroke during very hot weather
The Centre for Health Protection (CHP) of the Department of Health (DH) today (September 17) reminded members of the public, particularly those undertaking outdoor activities, to take heed of necessary measures against heat stroke and sunburn in very hot weather.
"The public should carry and drink plenty of water to prevent dehydration while engaging in outdoor activities," a spokesman for the CHP said.
"Those engaged in strenuous outdoor activities should avoid beverages containing caffeine, such as coffee and tea, as well as alcohol, as they speed up water loss through the urinary system," the spokesman explained.
"Infants and children, the elderly, pregnant women, those with chronic illnesses such as heart disease or high blood pressure, outdoor/manual workers, and individuals who are overweight are more vulnerable to heat stroke. They should pay special attention," the spokesman added.
The public should adopt the following precautions:
Wear loose and light-coloured clothing to reduce heat absorption and facilitate sweat evaporation and heat dissipation;
Avoid vigorous exercise and prolonged activities like hiking or trekking as heat, sweating and exhaustion can place additional demands on the physique;
Perform outdoor activities in the morning or the late afternoon, if possible;
For indoor activities, open all windows, use a fan or use air-conditioning to maintain good ventilation;
Do not stay inside a parked vehicle; and
Reschedule work to cooler times of the day if feasible. If working in a hot environment is inevitable, introduce shade in the workplace where practicable. Start work slowly and pick up the pace gradually. Move to a cool area for rest at regular intervals to allow the body to recuperate.
The public should also note the latest and the forecast Ultraviolet (UV) Index released by the Hong Kong Observatory (HKO). When the UV Index is high (6 or above):
Minimise direct exposure of the skin and the eyes to sunlight;
Wear long-sleeved and loose-fitting clothes;
Wear a wide-brimmed hat or use an umbrella;
Seek a shaded area or put on UV-blocking sunglasses;
Apply a broad-spectrum sunscreen lotion with a minimum sun protection factor (SPF) of 15, preferably higher. Reapply every two hours if you stay out in the sun, and after swimming, sweating or towelling off; and
While using DEET-containing insect repellents for personal protection against mosquito-borne diseases, apply sunscreen first, then insect repellent.
If symptoms develop, such as dizziness, headache, nausea, shortness of breath or confusion, rest and seek help immediately, and seek medical advice as soon as possible.
The public may obtain more information from the DH's Health Education Infoline (2833 0111),heat strokepage andUV radiationpage; the HKO's Dial-a-Weather (1878 200),latestweather report and forecast,UV Indexand weather information forhiking and mountaineering; andpress releasesof the Labour Departmenton precautions against heat stroke for outdoor workers and their employers when the Very Hot Weather Warning is in force.
Source: AI-generated images
