Over 6,200 dengue cases have been reported in Singapore as of 5 September 2023, according to the National Environment Agency (NEA).
Officials say there is a risk of a surge in dengue cases as Dengue virus serotype 1 (DENV-1) gains dominance against a backdrop of high weekly dengue cases, several large and persistent dengue clusters, and high Aedes mosquito populations in many places.
NEA has seen an increase in DENV-1 cases over the past two months, replacing the previously dominant Dengue virus serotype 3 (DENV-3). In July, the monthly proportion of DENV-1 cases was approximately 55 per cent, which was almost triple the proportion of DENV-3 cases at 17 per cent. The rise in proportion of a previously less prevalent Dengue virus serotype is of concern, as this has historically been associated with a surge in dengue cases months later.
There are 48 active dengue clusters, with 13 large clusters (i.e. cluster with 10 or more dengue cases), as of 5 September 2023.
Immediate action is needed by all to avoid a surge in dengue cases. Besides removal of stagnant water, everyone is strongly encouraged to carry out the ‘S-A-W’ actions (Spray insecticide in dark corners around the house, Apply insect repellent regularly and Wear long-sleeve tops and long pants). This will protect individuals from being bitten by the Aedes mosquito. Individuals diagnosed with or suspected to be infected with dengue are also advised to avoid further mosquito bites, by using insect repellent and carrying out the other S-A-W actions, to prevent passing on the Dengue virus to mosquitoes and other people in their neighborhoods.
NEA urges continued individual and collective community action to prevent mosquito breeding and reduce the Aedes mosquito population. All residents must also take immediate action to suppress the Aedes mosquito population and break disease transmission, by regularly practising the ‘B-L-O-C-K’ steps:
- Break up hardened soil
- Lift and empty flowerpot plates
- Overturn pails and wipe their rims
- Change water in vases
- Keep roof gutters clear and place BTI insecticide inside
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