6 October 2015
The Centre for Health Protection (CHP) of the Department of Health is today (October 6) investigating a case of Legionnaires' disease.
The male patient, aged 58 with good past health, lives in Yung Shing Court, Fanling. He presented with fever, cough and headache on September 30 and attended the Accident and Emergency Department of North District Hospital, where he was admitted for management on October 2. The clinical diagnosis was pneumonia and he has been in stable condition all along.
His urine specimen tested positive for Legionella pneumophila serogroup 1 antigen upon testing by Prince of Wales Hospital. Initial enquiries revealed that the patient had no travel history during the incubation period. His home contacts have remained asymptomatic.
"Epidemiological investigations into the possible source of infection are under way. Relevant water samples and environmental swabs will be collected from potential sources for laboratory testing. Health advice against LD has been given to the patient and his family," a spokesman for the CHP said.
"As Legionella are found in various environmental settings and aqueous environments, investigations are ongoing," the spokesman added.
This is the 49th LD case reported to the CHP this year. In 2014 and 2013, 41 and 28 cases were recorded respectively.
Legionella 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 get infected when they breathe in contaminated droplets (aerosols) and mist generated by artificial water systems. They may also get the infection when handling garden soil, compost and potting mixes.
It is most important to operate and maintain properly designed man-made water systems to prevent LD. The public may visit the pages below for more information: