Hong Kong – FEHD releases 2nd batch of gravidtrap index for Aedes albopictus in August

The Food and Environmental Hygiene Department (FEHD) today (August 11) launched the 2nd batch of gravidtrap index and density index for Aedes albopictus in August, covering 10 study locations, as follows:

In August, all the 10 study locations covered in the 2nd batch tape-recorded a gravidtrap index level lower than 10 percent.

The FEHD has up until now revealed the very first and the 2nd batches of the gravidtrap index for Aedes albopictus in August, covering 23 study locations. Amongst these 23 study locations, 17 tape-recorded a reduction in the Gravidtrap Index as compared to the Area Gravidtrap Index in last month, i.e. July 2025, representing enhancement in the locations’ mosquito invasion condition. The index of one location stayed the very same, while 4 locations taped a minor boost however the index was lower than 10 percent. In action to the current chikungunya fever (CF) scenario, the FEHD has actually triggered a system that reinforce mosquito control operate in locations with the gravidtrap index in between 10 percent and 20 percent, which was initially triggered when the gravidtrap index reaches 20 percent or above. The FEHD, in cooperation with pertinent departments and stakeholders, will reinforce the mosquito removal operate in So Kwun Wat, Tuen Mun, recognize places with high mosquito invasion, and perform extensive and targeted mosquito control procedures. The FEHD will likewise arrange exhibits, disperse brochures and posters, and alert the domestic estates signed up for the gravidtrap Rapid Alert System, recommending home management representatives and citizens to remain alert and sign up with hands in taking mosquito avoidance and removal steps.

The FEHD attract members of the general public to embrace the following procedures, reinforcing the avoidance versus the breeding of mosquitoes:

• Clean up their properties and look for any build-up of water in containers inside their properties;
• Get rid of all unneeded water collection and get rid of the sources;
• Totally alter the water in flower vases a minimum of as soon as a week and get rid of the water on the plant dishes;
• Effectively cover all containers that hold water;
• Correctly get rid of refuse, such as soda cans, empty bottles and boxes, in covered litter containers; and
• Level irregular ground surface areas and holes.

Beginning August this year, following the conclusion of security of specific study locations and when the current Gravidtrap Index and the Density Index are offered, the FEHD will share the pertinent details through news release, its site, and social networks. It intends to enable members of the general public to rapidly understand the mosquito invasion circumstance and reinforce mosquito control efforts, therefore minimizing the danger of CF transmission.

Following the suggestions from the World Health Organization and considering the regional circumstance in Hong Kong, the FEHD establishes gravidtraps in districts where mosquito-borne illness have actually been taped in the past, in addition to in largely inhabited locations such as real estate estates, healthcare facilities and schools, to keep track of 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 security, the FEHD will right away 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 security, the FEHD will quickly inspect the glue boards for the existence of adult Aedine mosquitoes. Information of the 2 weeks’ security will be integrated to acquire the Area Gravidtrap Index and the Area Density Index. The gravidtrap and density indices for Aedes albopictus in various study locations in addition to details on mosquito avoidance and control procedures are readily available on the department’s website (www.fehd.gov.hk/english/pestcontrol/dengue_fever/Dengue_Fever_Gravidtrap_Index_Update.html#).