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Update on number of dengue fever cases
     The Centre for Health Protection (CHP) of the Department of Health today (November 3) reported the latest number of cases of dengue fever (DF), and again urged the public to maintain strict environmental hygiene, mosquito control and personal protective measures both locally and during travel.

     From October 27 to November 2, the CHP recorded three confirmed DF cases. The patients had been to India, Myanmar and Vietnam during the incubation period.

     As of November 2, a total of 90 cases of DF had been confirmed in 2017, including one local case. The 89 imported cases were mainly imported from Thailand (20), the Philippines (13), Sri Lanka (11) and Vietnam (11).

     Dengue remains endemic in some areas in Asia. In Guangdong, there were 642 cases in 2017 as of October 13. The latest figures for 2017 revealed that 43 969 cases had been recorded in Thailand, 2 407 in Singapore and 213 in Japan (since January 2). In the Americas, the latest figures indicated that 58 697 cases were recorded in Mexico in 2017.

     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 long 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 carefully the label instructions first;
  • 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.

     The public may refer to the CHP's tips for using insect repellents for details.
Ends/Friday, November 3, 2017
Issued at HKT 16:00
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