FEHD Reports Low Aedes Albopictus Mosquito Indexes in September Across 16 Survey Areas

FEHD releases sixth batch of gravidtrap indexes for Aedes albopictus in September

The Food and Environmental Hygiene Department (FEHD) today (September 26) released the sixth batch of gravidtrap indexes and density indexes for Aedes albopictus in September, covering 16 survey areas, as follows:

District

Survey Area

September 2025

First Phase Gravidtrap Index

First Phase Density Index

Central and Western

Sai Wan

5.5%

1.0

Eastern

North Point

0.0%

N/A

Wan Chai

Tin Hau

0.0%

N/A

Wan Chai North

0.0%

N/A

Yau Tsim

Tsim Sha Tsui

0.0%

N/A

Sha Tin

Tai Wai

0.0%

N/A

Sha Tin East

1.6%

1.0

Ma On Shan

6.3%

1.0

Tai Po

Tai Po East

0.0%

N/A

District

Survey Area

September 2025

Area Gravidtrap Index

Area Density Index

Southern

Deep Water Bay and Repulse Bay

0.0%

N/A

Yau Tsim

Tsim Sha Tsui East

0.9%

1.0

Kowloon City

Kai Tak North

6.5%

1.0

Wong Tai Sin

Wong Tai Sin Central

0.9%

1.0

Kwun Tong

Kowloon Bay

2.8%

1.0

Tsuen Wan

Ma Wan

6.1%

1.0

Kwai Tsing

Tsing Yi North

4.5%

1.0

Among the sixth batch of First Phase Gravidtrap Indexes covering nine survey areas and Area Gravidtrap Indexes covering seven survey areas in September, all were below 10 per cent.

The FEHD has so far released six batches of gravidtrap indexes for Aedes albopictus in September 2025, covering 58 survey areas. Among these 58 survey areas, 49 recorded a decrease or remained unchanged in the individual gravidtrap index as compared to the Area Gravidtrap Index last month, i.e. August 2025, representing that the areas' mosquito infestation had improved or maintained a low level. Nine other areas recorded a slight increase, but the indexes were lower than 10 per cent.

Public participation is crucial to 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:

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 the 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 chikungunya fever (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 from 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

Scam alert related to banks

The following is issued on behalf of the Hong Kong Monetary Authority:

The Hong Kong Monetary Authority (HKMA) wishes to alert members of the public to the press releases issued by the banks listed below relating to fraudulent websites, internet banking login screens, phishing emails or other scams, which have been reported to the HKMA. Hyperlinks to the press releases are available on theHKMA website.

Bank

Type of scam

The Bank of East Asia, Limited

Fraudulent websites, internet banking login screens and phishing email

Shanghai Commercial Bank Limited

Fraudulent website and internet banking login screen

OCBC Bank (Hong Kong) Limited

Fraudulent website and internet banking login screen

Chong Hing Bank Limited

Fraudulent website and internet banking login screen

Chiyu Banking Corporation Limited

Fraudulent websites and internet banking login screens

The HKMA wishes to remind the public that banks will not send SMS or emails with embedded hyperlinks which direct them to the banks' websites to carry out transactions. They will not ask customers for sensitive information, such as login passwords or one-time password, by phone, email or SMS (including via embedded hyperlinks).

Anyone who has provided his or her personal information, or who has conducted any financial transactions, through or in response to the scams concerned, should contact the relevant bank with the information provided in the corresponding press release, and report the matter to the Crime Wing Information Centre of the Hong Kong Police Force at 2860 5012.

Source: AI-found images