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The Food and Environmental Hygiene Department has urged people to stay alert to the risk of mosquito-transmitted diseases and maintain proper anti-mosquito measures during the current rainy season.
A department spokesman said today (May 16) that the monthly average ovitrap index for April had risen to 2.9%, from 0.2% in March.
The ovitrap indices reflect the prevalence of Aedes albopictus, a mosquito vector for dengue fever transmission.
Among the 38 areas surveyed last month, positive ovitrap indices, ranging from 1.7% to 9.1% , were recorded in 24 areas, with the highest in Sham Shui Po East.
As for port areas, the index also rose slightly from 0% in March to 0.2% in April.
"Although the indices in April are relatively low, preventive measures should not be relaxed as dengue cases are prevalent in our neighbouring places," the spokesman said.
Aedes albopictus can breed in very small water bodies. Surface channels, discarded containers, sand traps and abandoned tyres all provide breeding grounds for mosquitoes if they are not properly handled.
The spokesman advised the public and estate management bodies to scrub all drains and surface sewers and limewash them with alkaline detergent compound at least once a week to remove any mosquito eggs. They should also keep the drains free from blockage and fill up all depressions to prevent accumulation of water.
He said people should inspect their homes and surroundings to remove potential breeding grounds; scrub vases and pot plant saucers at least once a week; properly dispose of containers such as soft drink cans and lunch boxes; clear drains and surface channels to prevent blockage; fill up all defective ground surfaces, and drill large holes in unused tyres.
The ovitrap indices and information on anti-mosquito measures under the Anti-Mosquito Weekly Inspection Programme are available on the department's website (www.fehd.gov.hk) and through its hotline at 2868 0000.
People can also obtain information and health advice on dengue fever from the website of the Department of Health's Centre for Health Protection (www.chp.gov.hk) and its hotline at 2833 0111.
Ends/Friday, May 16, 2008
Issued at HKT 15:11
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