October Gravidtrap Index Reveals Aedes Albopictus Density Across 29 Areas in Hong Kong

FEHD releases second batch of gravidtrap indexes for Aedes albopictus in October

The Food and Environmental Hygiene Department (FEHD) today (October 16) released the second batch of gravidtrap indexes and density indexes for Aedes albopictus in October, covering 29 survey areas, as follows:

District	Survey Area	October 2026
		First Phase Gravidtrap Index	First Phase Density Index
Islands	Tung Chung	0.0%	N/A
Kowloon City	Ho Man Tin	5.4%	1.0
	Hung Hom and To Kwa Wan	0.0%	N/A
	Kai Tak	4.3%	1.0
Sham Shui Po	Lai Chi Kok	0.0%	N/A
Wong Tai Sin	Wong Tai Sin West	0.0%	N/A
Sai Kung	Tseung Kwan O East	1.8%	1.0
	Tseung Kwan O West	1.9%	1.0
Sha Tin	Sha Tin Town Centre and Fo Tan	2.0%	1.0
Tai Po	Tai Po East	0.0%	N/A
Kwai Tsing	Tsing Yi North	1.7%	1.0
Tuen Mun	Tuen Mun West	4.0%	1.0

District	Survey Area	October 2026
		Area Gravidtrap Index	Area Density Index
Central and Western	Central and Admiralty	0.0%	N/A
	Kennedy Town and Shek Tong Tsui	4.7%	1.2
Eastern	Chai Wan	1.6%	1.0
	North Point and Quarry Bay	1.6%	1.0
	Shau Kei Wan and Sai Wan Ho	5.3%	1.0
Southern	Deep Water Bay and Repulse Bay	0.8%	1.0
Wan Chai	Tin Hau and Causeway Bay	1.9%	1.0
	Wan Chai	0.0%	N/A
Kwun Tong	Lam Tin and Sau Mau Ping	9.4%	1.2
	Yau Tong and Cha Kwo Ling	1.7%	1.0
Wong Tai Sin	Diamond Hill and Tsz Wan Shan	5.0%	1.0
	Wong Tai Sin East	1.0%	1.0
North	Fanling North	1.2%	1.0
	Fanling South	3.5%	1.0
Sha Tin	Sha Tin East	6.6%	1.0
Tsuen Wan	Sheung Kwai Chung	0.9%	1.0
Tuen Mun	Tuen Mun South	4.5%	1.0

The FEHD continues to carry out a series of mosquito prevention and elimination measures, including:

• interdepartmental collaboration: convening special meetings of the interdepartmental task forces on anti-mosquito work to co-ordinate relevant departments and stakeholders (such as construction site contractors, schools and property management companies) in strengthening mosquito control work at venues;
• precise risk assessments: carrying out intensive and targeted mosquito control work at locations with more serious mosquito infestations, including stepping up inspections, eliminating mosquito breeding and potential breeding grounds, applying larvicides, conducting fogging operations to eradicate adult mosquitoes, and placing mosquito trapping devices at appropriate locations;
• promotion and education: organising exhibitions with relevant departments and stakeholders, and distributing leaflets and posters to enhance public awareness of mosquito control and prevention; and
• rapid alert mechanism: notifying residential estates that have subscribed to the gravidtrap Rapid Alert System, and advising property management companies and residents to stay vigilant and work together in taking mosquito prevention and elimination measures.

During the follow-up actions and following the discovery of stagnant water at a private housing estatein Sha Tin District, the FEHD has issued a statutory notice to the responsible person-in-charge, requiring the clearance of such stagnant water within a specified timeframe.

Public participation is crucial to the effective control of mosquito problems. The FEHD appeals to members of the public to continue to work together in strengthening personal mosquito control measures, including:

• tidying up their premises and checking for any accumulation of water inside the premises;
• removing all unnecessary water collections and eliminating the sources;
• checking household items (those placed in outdoor and open areas in particular), such as refuse containers, vases, air conditioner drip trays, and laundry racks to prevent stagnant water;
• changing water in flower vases and scrubbing their inner surfaces thoroughly, and removing water in saucers under potted plants at least once a week;
• properly covering all containers that hold water to prevent mosquitoes from accessing the water;
• properly disposing of articles that can contain water, such as disposable meal boxes and empty cans; and
• scrubbing drains and surface sewers with alkaline detergent at least once a week to remove any mosquito eggs.

Starting in August 2025, following the completion of the surveillance of individual survey areas, and once the latest gravidtrap index and the density index are available, the FEHD has been disseminating relevant information through press releases, its website and social media. It aims to allow members of the public to quickly grasp the mosquito infestation situation and strengthen mosquito control efforts, thereby reducing the risk of chikungunya fever (CF) transmission.

Following recommendations from the World Health Organization and taking into account the local situation in Hong Kong, the FEHD sets up gravidtraps in districts where mosquito-borne diseases have been recorded in the past, as well as in densely populated places such as housing estates, hospitals and schools to monitor the breeding and distribution of Aedes albopictus mosquitoes, which can transmit CF and dengue fever. At present, the FEHD has set up gravidtraps in 62 survey areas of the community, with a surveillance period of two weeks. During the surveillance period, the FEHD will collect the gravidtraps once a week. After the first week of surveillance, the FEHD will immediately examine the glue boards inside the retrieved gravidtraps for the presence of adult Aedine mosquitoes to compile the Gravidtrap Index (First Phase) and Density Index (First Phase). At the end of the second week of surveillance, the FEHD will instantly check the glue boards for the presence of adult Aedine mosquitoes. Data from the two weeks of surveillance will be combined to obtain the Area Gravidtrap Index and the Area Density Index. The Gravidtrap and Density indexes for Aedes albopictus in different survey areas, as well as information on mosquito prevention and control measures, are available on the department's webpage (www.fehd.gov.hk/english/pestcontrol/dengue_fever/Dengue_Fever_Gravidtrap_Index_Update.html#).

FEHD releases second batch of gravidtrap indexes for Aedes albopictus in October Source: HKSAR Government Press Releases

FEHD releases second batch of gravidtrap indexes for Aedes albopictus in October Source: HKSAR Government Press Releases

FEHD releases second batch of gravidtrap indexes for Aedes albopictus in October Source: HKSAR Government Press Releases

FEHD releases second batch of gravidtrap indexes for Aedes albopictus in October Source: HKSAR Government Press Releases

Remarks by STL at media session

Following are the remarks by the Secretary for Transport and Logistics, Ms Mable Chan, at a media session following the maiden voyage ceremony for the southbound travel of yachts from Guangdong today (October 16):

Reporter: Given that there are only 150 berths at five anchorages, are you worried about running out of space during peak seasons? Under what circumstances will the Government consider capping daily visits and setting up more berth spots in the future?

Secretary for Transport and Logistics: Having regard to the potential demand and the existing supply of mooring facilities in Hong Kong, we consider that there are adequate facilities for the mooring and docking of Mainland yachts to Hong Kong. At the present moment, we have allowed these Mainland yachts to dock or moor at five designated mooring anchorage areas, in addition to the existing mooring facilities in yacht clubs. We consider that this could meet the demand. Coupled with the real-time dynamic monitoring system, the Marine Department can communicate with the Mainland yacht captains so as to facilitate their travel in Hong Kong waters.

We are also planning ahead. The Airport Authority Hong Kong and the Hong Kong Special Administrative Region Government are planning for the development of four major new yacht parking facilities in different parts of Hong Kong, including the Airport island, Aberdeen, Lamma Island, and Hung Hom waterfront. We are working steadfastly on that. The Airport Authority Hong Kong is actually moving fast in inviting expressions of interest for the Yacht Bay on the Airport island. We expect they will invite tenders next year.

(Please also refer to the Chinese portion of the remarks.)

Source: AI-found images