Update on chikungunya fever
The Centre for Health Protection (CHP) of the Department of Health announced that as of 5pm today (December 28), the CHP has recorded one new imported case of chikungunya fever (CF).
Latest case information
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The case involves a 35-year-old female living in Kwai Tsing District. A preliminary investigation revealed that she joined a package tour to Zhaoqing in Guangdong Province with family members from December 20 to 21, and had suffered mosquito bites in rural areas there. She developed joint pain on December 25, followed by rash on the following day, and a fever yesterday (December 27). She attended the Accident and Emergency Department of Princess Margaret Hospital on the same day and was admitted for treatment in a mosquito-free environment. She is now in stable condition. Her blood sample tested positive for the chikungunya virus upon laboratory testing.
The patient has three household contacts, who joined the same package tour to Zhaoqing. They are currently asymptomatic and under medical surveillance.The CHP will proactively contact the remaining 39 individuals who joined the same package tour, and provide health advice and medical surveillance to them.
An epidemiological investigation showed that her residenceand usual activity areas do not overlap with those among imported or local cases recorded inthe pastmonth.She did not visit the Tsing Yi Nature Trails during the incubation period either. As the patient visited Guangdong Province during the incubation period, and no epidemiological linkages have been established between thecase and other cases recorded in Hong Kongin the past month, the CHP considered that the case was infected duringhertravel. The caseisclassified as imported. The CHPwillreport the cases to the health authority of Guangdong Province.
Hong Kong has recorded a total of 82 confirmed CF cases this year. Among them, 11 were local cases, and the rest were imported cases.
Government's comprehensive follow-up actions
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Given that some local cases of CF have visited the Tsing Yi Nature Trails or the surrounding area in November, the trails are currently closed until further notice. Relevant government departments continue to conduct large-scale mosquito control and prevention efforts along the trails, the CHP appeals to the public not to enter the area in order to reduce the risk of contracting CF and to avoid exposure to chemicals or interfering with the mosquito control operations. Since the confirmation on December 10 of a case involving a person who had visited the Tsing Yi Nature Trails on November 30, no further local cases have been recorded to date. The CHP continues to urge individuals who have recently hiked along the Tsing Yi Nature Trails to seek medical attention as soon as possible if they develop relevant symptoms and to call the enquiry hotline (Tel: 2125 2373), which operates from 9am to 6pm.
The Food and Environmental Hygiene Department (FEHD) has been continuously conducting intensive fogging operations to eliminate adult mosquitoes along the Tsing Yi Nature Trails and the surrounding area. At suitable locations, large ultra-low volume foggers have been deployed, and a robot dog is being put on trial to enhance operational effectiveness. The FEHD has also set up new mosquito trapping devices, cleared discarded containers and garbage that could cause stagnant water, and applied larvicide oil or larvicides in areas with stagnant water that cannot be removed immediately. The FEHD has been collaborating with the Kwai Tsing District Office, the Lands Department and the Drainage Services Department to strengthen efforts in eliminating potential mosquito breeding sites along the Tsing Yi Nature Trails. Pamphlets have been distributed to hikers in the area, urging citizens to be vigilant against mosquito infestations and take personal protective measures. The FEHD also held meetings of the interdepartmental task forces on anti-mosquito work across districts, to discuss the latest developments regarding the situation and plan accordingly to co-ordinate relevant departments and stakeholders in strengthening mosquito prevention and control measures in areas under their purview.
Continuously strengthening prevention and control
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The FEHD and relevant departments have comprehensively enhanced the mosquito control operations in Hong Kong since July this year, and this has continued. Among these, the FEHD has conducted vector investigations and targeted mosquito control operations against the imported and local cases. In light of the local case, the FEHD has immediately conducted follow-up actions, including:
The abovementioned measures will be continued. Furthermore, the Government will further enhance the mosquito control efforts in addition to the existing measures.
Preventive measures taken by the public
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Members of the public should use DEET-containing insect repellents or other effective active ingredients properly to prevent mosquito bites, but the following precautions should be taken when using them:
The FEHD also appeals to members of the public to continue to stay alert and work together to carry out mosquito prevention and control measures early, including inspecting their homes and surroundings to remove potential breeding grounds, changing water in vases and scrubbing their inner surfaces, removing water in saucers under potted plants at least once a week, and properly disposing of containers such as empty cans and lunch boxes. The FEHD also advises members of the public and property management agencies to keep drains free of blockage and level all defective ground surfaces to prevent the accumulation of water. They should also scrub all drains and surface sewers with an alkaline detergent at least once a week to remove any mosquito eggs.
The public should call 1823 in case of mosquito problems, and may visit the following pages for more information: the CF page of theCHPand theTravel Health Service, the latestTravel Health News,tips for using insect repellents, and the CHPFacebook Page,Instagram AccountandYouTube Channel, and also theMosquito Prevention and Control dedicated pageof the FEHD.
Source: AI-found images
