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Dengue Fever
CHP investigates one additional local case of dengue fever
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The Centre for Health Protection (CHP) of the Department of Health is investigating today (August
19) one additional local case of dengue fever (DF). The CHP again urged the public to maintain strict
environmental hygiene, mosquito control and personal protective measures both locally and during
travel.
 
The case involves a 52-year-old male patient with underlying illness, who developed fever,
headache, retro-orbital pain, myalgia and skin rash since August 15. He sought medical attention at
the Accident and Emergency Department of St John Hospital on August 18 and was subsequently
admitted to Queen Mary Hospital on the same day. He is currently in a stable condition and his blood
sample tested positive for dengue virus serotype 3 upon laboratory testing.
Initial enquiries revealed that the patient lives in Tsan Tuen Road in Cheung Chau and recalled
history of mosquito bite in Fa Peng Road in Cheung Chau. During the incubation period, the patient
had travelled to Dongguan in Guangdong for a day trip.
 
The home contacts of the patient have remained asymptomatic and have been put under medical
surveillance.
 
"We are working closely with the Food and Environmental Hygiene Department (FEHD) to assess
and prevent possible spread of infection. The FEHD's vector investigations, surveillance and control
are ongoing. Epidemiological investigations are ongoing," a spokesman for the CHP said.
"The CHP, together with the FEHD, will arrange a health talk in Cheung Chau. In addition, two
health talks will be held at Kai Tak Community Hall (3pm) and Henry G. Leong Yaumatei Community
Centre (noon) tomorrow (August 20) to deliver health advice. The CHP has also
provided information and details of geographical distribution on the local DF cases on the CHP's
designated webpage for DF to facilitate handy access of information for the public," the spokesman
said.
 
"The CHP appeals to members of the public not to visit Lion Rock Park during the closure period
in order to prevent contracting DF. People who had visited Lion Rock Park are advised to apply insect
repellent for 14 days upon their last visit, and those with DF symptoms should seek medical advice as
early as possible," the spokesman said.
 
Persons who have been to the vicinity of Wong Tai Sin (particularly Lion Rock Park), Kwai Shing
West Estate, Clear Water Bay Second Beach, Cheung Chau (Hillside Road, Tsan Tuen Road and Fa
Peng Road), Highland Park, Sai Tso Wan Recreation Ground, Wing Yiu Street, Tak Long Estate,
Portland Street, Shanghai Street and Greenfield Garden with DF symptoms should call the CHP's
hotline (2125 1122) for laboratory investigation or referral as appropriate. The hotline operates from
9am to 5.45pm daily. Since August 14 to 5pm today, 91 enquiries had been received.
 
"We have informed the Guangdong and Macao health authorities to alert them to the latest
situation," the spokesman added.
 
This is the 16th local case recorded this year. Excluding the local cases, as of August 17, 57
imported cases had been recorded in 2018. The cases were mainly imported from Thailand (25), the
Philippines (10) and Cambodia (seven).
 
In the rainy season, the public should take heed of the following advice on mosquito control:
 Thoroughly check all gully traps, roof gutters, surface channels and drains to prevent blockage;
 Scrub and clean drains and surface channels with an alkaline detergent compound at least once
a week to remove any deposited mosquito eggs;
 Properly dispose of refuse, such as soft drink cans, empty bottles and boxes, in covered litter
containers;
 Completely change the water of flowers and plants at least once a week. The use of saucers
should be avoided if possible;
 Level irregular ground surfaces before the rainy season;
 Avoid staying in shrubby areas; and
 Take personal protective measures such as wearing light-coloured long-sleeved clothes and
trousers and apply insect repellent containing DEET to clothing or uncovered areas of the body
when doing outdoor activities.
 
To reduce the risk of infections spread by mosquitoes, apart from general measures, travellers
returning from affected areas should apply insect repellent for 14 days (DF) or at least 21 days (Zika
Virus Infection) upon arrival in Hong Kong. If feeling unwell, seek medical advice promptly and
provide travel details to the doctor. DEET-containing insect repellents are effective and the public
should take heed of the tips below:
 
 Read the label instructions carefullyfirst;
 Apply right before entering an area with risk of mosquito bites;
 Apply on exposed skin and clothing;
 Use DEET of up to 30 per cent for pregnant women and up to 10 per cent for children*;
 Apply sunscreen first, then insect repellent; and
 Re-apply only when needed and follow the instructions.
* For children who travel to countries or areas where mosquito-borne diseases are endemic or epidemic
and where exposure is likely, those aged 2 months or above can use DEET-containing insect repellents
with a DEET concentration of up to 30 per cent.
 
The public should call 1823 in case of mosquito problems and may visit the DF pages of the CHP
and its Travel Health Service, the latest Travel Health News, tips for using insect repellents, the CHP
Facebook Page and YouTube Channel, and the FEHD's Guidebook on Control and Prevention of
Mosquito Breeding for more information.
Ends/Sunday, August 19, 2018
Issued at HKT 21:09