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FEHD Releases August Gravidtrap Index for Aedes Albopictus, Highlighting Low Mosquito Infestation Levels Across Survey Areas

HK

FEHD Releases August Gravidtrap Index for Aedes Albopictus, Highlighting Low Mosquito Infestation Levels Across Survey Areas
HK

HK

FEHD Releases August Gravidtrap Index for Aedes Albopictus, Highlighting Low Mosquito Infestation Levels Across Survey Areas

2025-08-11 22:30 Last Updated At:22:38

FEHD releases second batch of gravidtrap index for Aedes albopictus in August

The Food and Environmental Hygiene Department (FEHD) today (August 11) released the second batch of gravidtrap index and density index for Aedes albopictus in August, covering 10 survey areas, as follows:

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Source: AI-found images

Source: AI-found images

District

Survey Area

August 2025

First Phase Gravidtrap Index

First Phase Density Index

Central/Western

Sheung Wan and Sai Ying Pun

7.3%

1.5

Wanchai

Happy Valley

9.6%

1.0

Mong Kok

Mong Kok

0.0%

N/A

Wong Tai Sin

Wong Tai Sin West

1.9%

1.0

Sai Kung

Tseung Kwan O West

3.6%

1.0

Tseung Kwan O East

5.5%

1.0

Tseung Kwan O North

2.3%

3.0

North

Sheung Shui

9.5%

1.0

Yuen Long

Yuen Long Town

1.8%

1.0

Tuen Mun

Tuen Mun North

3.2%

1.0

In August, all the 10 survey areas covered in the second batch recorded a gravidtrap index level lower than 10 per cent.

The FEHD has so far announced the first and the second batches of the gravidtrap index for Aedes albopictus in August, covering 23 survey areas. Among these 23 survey areas, 17 recorded a decrease in the Gravidtrap Index as compared with the Area Gravidtrap Index in last month, i.e. July 2025, representing improvement in the areas' mosquito infestation condition. The index of one area remained the same, while four areas recorded a slight increase but the index was lower than 10 per cent. In response to the recent chikungunya fever (CF) situation, the FEHD has activated a mechanism that strengthen 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 20per cent or above. The FEHD, in collaboration with relevant departments and stakeholders, will strengthen the mosquito elimination work in So Kwun Wat, Tuen Mun, identify locations with high mosquito infestation, and carry out intensive and targeted mosquito control measures. 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.

The FEHD appeals to members of the public to adopt the following measures, strengthening the prevention against the breeding of mosquitoes:

  • Tidy up their premises and check for any accumulation of water in containers inside their premises;
  • Remove all unnecessary water collection and eliminate the sources;
  • Completely change the water in flower vases at least once a week and remove the water on the plant saucers;
  • Properly cover all containers that hold water;
  • Properly dispose of refuse, such as soft drink cans, empty bottles and boxes, in covered litter containers; and
  • Level irregular ground surfaces and holes.
  • Starting 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 indices 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

    Source: AI-found images

    Secretary for Health attends 20th Joint Meeting of Senior Health Officials of Mainland, Hong Kong and Macao in Macao

    The Secretary for Health, Professor Lo Chung-mau, led a delegation to attend the 20th Joint Meeting of Senior Health Officials of the Mainland, Hong Kong and Macao hosted by the Macao Special Administrative Region (SAR) Government in Macao today (January 15).

    The annual Joint Meeting has long been a platform for senior medical and health officials as well as experts from the Mainland, Hong Kong and Macao to exchange views and share experiences on present-day medical and public health issues, as well as to promote healthcare service development. The Joint Meeting is hosted by the Mainland, Hong Kong and Macao in rotation.

    The Minister of the National Health Commission, Mr Lei Haichao, and the Secretary for Social Affairs and Culture of the Macao SAR Government, Ms O Lam, led senior health officials from the Mainland and the Macao SAR Government respectively to participate in the meeting. Members of the delegations of the three places today engaged in sharing and discussions over three major topics, namely nurturing interdisciplinary and composite talent in clinical management, disease prevention and control, and medical administration; strengthening primary healthcare services to safeguard community health, and the application of smart healthcare in the health sector.

    Professor Lo said, "The Recommendations of the Communist Party of China (CPC) Central Committee for Formulating the 15th Five-Year Plan for National Economic and Social Development, adopted at the Fourth Plenary Session of the 20th CPC Central Committee, features the term 'reform' 23 times, unequivocally underscoring the nation's steadfast commitment to deepening reforms. Hong Kong has consistently been playing an active role in the course of the country's reform and opening up. Serving as a 'super connector' between the Mainland and the world, Hong Kong also functions as an indispensable 'super value-adder', facilitating the nation's effort in going global while attracting foreign investment to the Mainland market.

    "The Chief Executive of the Hong Kong Special Administrative Region (HKSAR) has consistently emphasised in the Policy Addresses of the past three years the HKSAR Government's full commitment to developing Hong Kong into an international health and medical innovation hub, and to vigorously foster new quality productive forces. To achieve this significant objective, the HKSAR Government is actively advancing various initiatives, including the setting up of the Hong Kong Centre for Medical Products Regulation within this year, with a view to establishing the Centre as an internationally recognised regulatory authority for medical products as soon as possible; the official launch of the Greater Bay Area (GBA) Clinical Trial Collaboration Platform last month, enabling pharmaceutical companies to conduct trials simultaneously in Hong Kong and Shenzhen; as well as the commissioning of the Real-World Study and Application Centre to promote the standardisation of clinical data across the GBA."

    The Chief Executive of the Hospital Authority (HA), Dr Libby Lee, and the Director of Cluster Services of the HA, Dr Wong Yiu-chung, moderated a discussion and gave a presentation on the application of smart healthcare in the health sector respectively. Meanwhile, the acting Deputy Director of Health, Dr Jackie Leung, and the Commissioner for Primary Healthcare, Dr Pang Fei-chau, delivered presentations on the topic of nurturing interdisciplinary and composite talent in clinical management, disease prevention and control, and medical administration; as well as on the topic of strengthening primary healthcare services to safeguard community health respectively.

    Members of the HKSAR Government delegation included the Chairman of the HA, Mr Henry Fan, and the Director of Health, Dr Ronald Lam, who concluded the discussion at the meeting.

    Professor Lo will return to Hong Kong in the evening. During his absence, the Under Secretary for Health, Dr Cecilia Fan, is the Acting Secretary for Health.

    Secretary for Health attends 20th Joint Meeting of Senior Health Officials of Mainland, Hong Kong and Macao in Macao Source: HKSAR Government Press Releases

    Secretary for Health attends 20th Joint Meeting of Senior Health Officials of Mainland, Hong Kong and Macao in Macao Source: HKSAR Government Press Releases

    Secretary for Health attends 20th Joint Meeting of Senior Health Officials of Mainland, Hong Kong and Macao in Macao Source: HKSAR Government Press Releases

    Secretary for Health attends 20th Joint Meeting of Senior Health Officials of Mainland, Hong Kong and Macao in Macao Source: HKSAR Government Press Releases

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