FEHD Releases August Gravidtrap Index for Aedes Albopictus, Most Areas Below 10% Infestation Level

FEHD releases fifth batch of gravidtrap indexes for Aedes albopictus in August

The Food and Environmental Hygiene Department (FEHD) today (August 19) released the fifth batch of gravidtrap indexes and density indexes for Aedes albopictus in August, covering 14 survey areas, as follows:

District

Survey Area

August 2025

First Phase Gravidtrap Index

First Phase Density Index

Southern

Pokfulam

6.8%

1.3

Islands

Cheung Chau South

0.0%

N/A

Cheung Chau North

6.1%

1.0

Wong Tai Sin

Ngau Chi Wan

9.8%

1.0

District

Survey Area

August 2025

Area Gravidtrap Index

Area Density Index

Central Western

Sheung Wan and Sai Ying Pun

3.7%

1.5

Wanchai

Happy Valley

4.6%

1.0

Mong Kok

Mong Kok

0.9%

1.0

Wong Tai Sin

Wong Tai Sin West

1.9%

1.0

Sai Kung

Tseung Kwan O West

4.5%

1.0

Tseung Kwan O East

6.3%

1.0

Tseung Kwan O North

3.5%

2.3

North

Sheung Shui

8.7%

1.0

Yuen Long

Yuen Long Town

4.5%

1.0

Tuen Mun

Tuen Mun North

2.3%

1.3

Among the fifth batch of First Phase Gravidtrap Indexes covering four survey areas and Area Gravidtrap Indexes covering 10 survey areas in August, all were below 10 per cent.

The FEHD has so far announced five batches of gravidtrap indexes for Aedes albopictus in August, covering 31 survey areas. Among these 31 survey areas, 18 recorded a decrease or remained unchanged in the individual gravidtrap index as compared with the Area Gravidtrap Index last month, i.e. July 2025, representing the areas' mosquito infestation improved or maintained at a low level. Ten other areas recorded a slight increase, but the indexes were lower than 10 per cent.

As for areas with an index over 10 per cent, including Ma On Shan in Sha Tin, and So Kwun Wat and Tuen Mun West in Tuen Mun, in accordance with the mechanism implemented by the FEHD in response to the recent chikungunya fever (CF) situation that strengthens mosquito control work in areas with the gravidtrap index between 10 per cent and 20 per cent, which was originally activated when the gravidtrap index reaches 20 per cent or above, the FEHD is collaborating with relevant departments and stakeholders to identify locations with high mosquito infestation and carry out intensive and targeted mosquito control measures. In particular, gravidtrap data for Tuen Mun District showed that the areas with more mosquito problems included parks, schools and private housing estates, and the relevant departments and stakeholders are actively following up. Additionally, the FEHD will also organise exhibitions, distribute leaflets and posters, and notify the residential estates subscribed to the gravidtrap Rapid Alert System, advising property management agents and residents to stay vigilant and join hands in taking mosquito prevention and elimination measures. In addition, the FEHD will strengthen the monitoring of the gravidtrap indexes in those three areas to review the effectiveness of the mosquito control work.

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

tidy up their premises and check for any accumulation of water inside their premises;

​remove all unnecessary water collection and eliminate the sources;

check 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;

change the water in flower vases and saucers of potted plants at least once every seven days;

properly cover all containers that hold water to prevent mosquitoes from accessing the water; and

properly dispose of articles that can contain water, such as empty lunch boxes and cans.

Starting in August this year, following the completion of surveillance of individual survey areas, and once the latest Gravidtrap Index and the Density Index are available, the FEHD will disseminate the 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 CF transmission.

Following the 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 64 survey areas of the community. During the two weeks of surveillance, 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 of the two weeks' 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#).

Source: AI-found images

Hong Kong International Legal Talents Training Academy and Supreme People's Court co-organise 2nd edition of Hong Kong Common Law Practical Training Course

The second edition of the Hong Kong Common Law Practical Training Course, co-organised by the Hong Kong International Legal Talents Training Academy and the Supreme People's Court, is being held from today (January 14) to January 22. Focusing on company law, this edition will guide participants to gain a deeper understanding of Hong Kong's company law framework.

Addressing the opening ceremony of the course today, the Secretary for Justice, Mr Paul Lam, SC, said that the first edition of this course, which was held in January last year, was the inaugural programme of the Academy after its launch in 2024, and positive results had been achieved. Mr Lam expressed his gratitude to the Supreme People's Court for their continued support and trust in the Academy. He said that the course is a key initiative to implement the national policy of strengthening Mainland judges' ability to handle foreign-related cases, in line with the priorities anticipated in the 15th Five-Year Plan to be announced in March this year.

Building on the inaugural training course, this edition focuses on company law with the participation of 24 senior judges from 22 courts on the Mainland, including the Supreme People's Court and courts from 12 provinces as well as three direct-administered municipalities. The course will feature an in-depth exploration of Hong Kong's robust company law framework through lectures, dialogue sessions and interactive practices on topics such as company structures, guarantees and liquidations. Speakers of the course include Hong Kong's leading legal scholars, experts and eminent judges in the field of company law, who will share their practical insights into Hong Kong's common law system and company law. With the Ceremonial Opening of the Legal Year 2026 taking place this month, participants will attend this important annual legal event, and visit the courts and international legal institutions in Hong Kong to learn more about Hong Kong's development as a legal hub and a centre for international legal and dispute resolution services in the Asia-Pacific region.

The Academy will continue to leverage the unique advantages of the "one country, two systems" principle and the Hong Kong common law system to organise more capacity-building programmes, thereby promoting judicial and legal exchanges and mutual learning between the Mainland and Hong Kong, and further contributing to the country's efforts to promote the construction of the foreign-related rule of law.

Hong Kong International Legal Talents Training Academy and Supreme People's Court co-organise 2nd edition of Hong Kong Common Law Practical Training Course Source: HKSAR Government Press Releases

Hong Kong International Legal Talents Training Academy and Supreme People's Court co-organise 2nd edition of Hong Kong Common Law Practical Training Course Source: HKSAR Government Press Releases