Hong Kong – FEHD releases 6th batch of gravidtrap indexes for Aedes albopictus in October

The Food and Environmental Hygiene Department (FEHD) today (October 28) launched the 6th batch of gravidtrap indexes and density indexes for Aedes albopictus in October, covering 17 study locations, as follows:

Amongst the 6th batch of First Phase Gravidtrap Indexes covering 14 study locations and Area Gravidtrap Indexes covering 3 study locations in October, all were listed below 10 percent.

The FEHD has actually up until now launched 6 batches of gravidtrap indexes for Aedes albopictus in October 2025, covering 58 study locations. Amongst these 58 study locations, 42 tape-recorded a decline or stayed the same in the private gravidtrap index as compared to the Area Gravidtrap Index last month, i.e. September 2025, representing that the locations’ mosquito problem enhanced or kept a low level. Sixteen other locations taped a minor boost, however the indexes were lower than 10 percent.

Public involvement is essential to the reliable control of mosquito issues. The FEHD attract members of the general public to continue to interact in enhancing individual mosquito control procedures, consisting of:

• clean up their properties and look for any build-up of water inside their properties;
• eliminate all unneeded water collections and remove the sources;
• check family products (those positioned in outside and open locations in specific), such as refuse containers, vases, a/c unit drip trays, and laundry racks to avoid stagnant water;
• alter the water in flower vases and dishes of potted plants a minimum of as soon as every 7 days;
• appropriately cover all containers that hold water to avoid mosquitoes from accessing the water; and
• correctly deal with short articles that can include water, such as empty lunch boxes and cans.

Beginning in August this year, following the conclusion of the security of private study locations, and when the current gravidtrap index and the density index are offered, the FEHD is distributing the appropriate info through news release, its site, and social networks. It intends to enable members of the general public to rapidly understand the mosquito invasion scenario and enhance mosquito control efforts, consequently minimizing the danger of chikungunya fever (CF) transmission.

Following the suggestions from the World Health Organization and considering the regional scenario in Hong Kong, the FEHD establishes gravidtraps in districts where mosquito-borne illness have actually been tape-recorded in the past, in addition to in largely inhabited locations such as real estate estates, medical facilities and schools to keep an eye on the breeding and circulation of Aedes albopictus mosquitoes, which can transfer CF and dengue fever. At present, the FEHD has actually established gravidtraps in 64 study locations of the neighborhood. Throughout the 2 weeks of security, the FEHD will gather the gravidtraps when a week. After the very first week of monitoring, the FEHD will instantly analyze the glue boards inside the obtained gravidtraps for the existence of adult Aedine mosquitoes to assemble the Gravidtrap Index (First Phase) and Density Index (First Phase). At the end of the 2nd week of monitoring, the FEHD will immediately examine the glue boards for the existence of adult Aedine mosquitoes. Information from the 2 weeks of security will be integrated to acquire the Area Gravidtrap Index and the Area Density Index. The gravidtrap and density indexes for Aedes albopictus in various study locations along with details on mosquito avoidance and control steps are readily available on the department’s web page (www.fehd.gov.hk/english/pestcontrol/dengue_fever/Dengue_Fever_Gravidtrap_Index_Update.html#).