SINGAPORE - The total number of dengue cases fell further to 421 in the week from Feb 7 to 13, according to the latest figures released by the National Environment Agency (NEA).
While this was 104 cases fewer than the number reported the previous week, NEA said the figure is "still much higher than usual" for this period of the year.
A total of 3,454 cases have been reported since Jan 3.
There has been an increase in the Aedes mosquito population due to warmer conditions caused by the El Nino phenomenon. The conditions support faster breeding and maturation cycles of the mosquitoes, as well as shorter incubation periods for the virus, NEA added.
Additionally, the proportion of dengue cases owing to the DENV-2 serotype has increased and now accounts for about two-thirds of all dengue cases serotyped in Singapore.
Previously, the DENV-1 serotype had been dominant since March 2013.
According to NEA, the source eradication of breeding habitats remains a priority. Urging the public to check their premises daily, it added that plant buyers and owners should be extra vigilant especially during and after the Chinese New Year period.
Members of the public are also encouraged to join in the collective effort to help stop the dengue transmission cycle by doing the five-step Mozzie Wipeout.