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The monthly average ovitrap index for March edged up to 0.4% from 0% in February, according to the Food and Environmental Hygiene Department (FEHD).
The ovitrap indices reflect the prevalence of Aedes albopictus, a mosquito vector for dengue fever transmission.
An FEHD spokesman today (April 25) reminded the public that, despite the index remaining relatively low, it is necessary to step up measures against mosquito breeding and to stay alert to the risk of mosquito-transmitted diseases with the advent of the rainy season.
Among the 44 areas surveyed last month, positive ovitrap indices were recorded in six areas, ranging from 1.7% to 5%, with the highest in Tsuen Wan town centre.
As for the port areas, the monthly ovitrap index for March remained at zero as in February.
"As the current humid and warm weather is conducive to mosquito breeding, anti-mosquito measures should not be relaxed," the spokesman said.
To heighten public awareness of the potential risk of mosquito-borne diseases, including dengue fever and Japanese encephalitis, the second phase of a 10-week Anti-mosquito Campaign for this year will be launched next Monday (April 30).
During the three-phase campaign period, relevant government departments and public bodies will strengthen mosquito prevention and control measures as well as publicity efforts throughout the territory.
Aedes albopictus breeds in small water bodies. The spokesman advised the public and building management bodies to scrub all drains and surface sewers, and to limewash them with an alkaline detergent compound at least once a week to remove any mosquito eggs.
They should also keep drains free of blockage and fill up all depressions to prevent puddles from forming.
"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, and drill large holes in unused tyres," the spokesman said.
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.
Ends/Wednesday, April 25, 2012
Issued at HKT 16:01
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