Monthly gravidtrap index for Aedes albopictus mosquitoes for April remains at lowest level
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In April, all 64 survey areas recorded a gravidtrap index level lower than the alert level of 20 per cent. Moreover, the monthly density index for Aedes albopictus in April was 1.1, which means that an average of 1.1 Aedes albopictus adult was found in the Aedes-positive gravidtraps, indicating that the number of adult Aedes albopictus was not abundant in the survey areas. The gravidtrap and density indices for Aedes albopictus in different survey areas, as well as information on mosquito prevention and control measures, are available on the department website at www.fehd.gov.hk.
A spokesman for the FEHD said, "As summer is approaching, the FEHD reminds members of the public to carry out early effective prevention and control measures against mosquitoes as mosquitoes breed quickly in the hot and rainy weather. The Government has long been concerned about mosquito infestation. The FEHD has continued to intensify the mosquito prevention and control work with relevant government departments in areas under their purview, including eliminating mosquito breeding places, applying larvicides, conducting fogging operations to eradicate adult mosquitoes, and placing mosquito trapping devices at suitable locations. The FEHD has also conducted site inspections with relevant departments, and provided them with professional advice and technical support to assist them in formulating and implementing effective anti-mosquito measures swiftly. At the same time, the FEHD has strengthened publicity and education. Under the concerted efforts and collaboration of various parties, the index in April remained at a low level. The FEHD will continue to monitor the mosquito infestation in all districts, and will conduct prompt and effective mosquito prevention and control work. At the same time, members of the public are advised to continue the routine mosquito prevention and control work, especially the repair and maintenance of structures. Cracks and dents which may accumulate water and become potential breeding grounds should be filled and levelled to reduce the chance of mosquito breeding."
The FEHD will conduct a three-phase Anti-mosquito Campaign this year. The second phase of the territory-wide campaign was launched on April 14 and will run until June 13. During the period, the district offices of the FEHD will target areas that have drawn particular concern, such as public markets, cooked food centres and hawker bazaars, single-block buildings, streets and back lanes, common parts of buildings, village houses, construction sites, vacant sites and road works sites to remove accumulated water and carry out mosquito prevention and control work. To further enhance the effectiveness of mosquito control, the FEHD and relevant government departments have carried out phase two of the All-out Anti-mosquito Operations from May 7. In addition to the work of phase one, including eliminating potential mosquito breeding places, the FEHD called on property management entities to arrange for necessary repairs to their premises to minimise mosquito breeding places and commence adult mosquito control measures by means of regular ultra-low volume fogging operations.
The FEHD appeals to members of the public to continue to stay alert and work together to carry out mosquito prevention and control measures early, including inspecting their homes and surroundings to remove potential breeding grounds, changing water in vases and scrubbing their inner surfaces, removing water in saucers under potted plants at least once a week, properly disposing of containers such as soft drink cans and lunch boxes, and drilling large holes in unused tyres. The FEHD also advises members of the public and estate management bodies to keep drains free of blockage and level all defective ground surfaces to prevent the accumulation of water. They should also scrub all drains and surface sewers with an alkaline detergent at least once a week to remove any mosquito eggs.
Aedes albopictus is a kind of mosquito that can transmit dengue fever (DF). DF is commonly found in tropical and subtropical regions of the world, and has become endemic in many countries in Southeast Asia. In 2024, the World Health Organization recorded over 14 million DF cases, which was a record number. The dengue activity in neighbouring areas has remained high. Members of the public should stay vigilant and continue to carry out effective mosquito prevention and control measures.
Ends/Tuesday, May 20, 2025
Issued at HKT 17:00
Issued at HKT 17:00
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