Director general of health services Dr. Palitha Mahipala said they included Colombo, Gampaha, Kalutara, Kurunegala, Kandy, Matale, Galle and Matara districts.

Seven hundred and sixty teams comprising law enforcement and health officials, including for fumigation, will enforce the laws against mosquito breeding.

This year, 22,799 dengue patients have been identified, 7,369 of them from Colombo, followed by 2,091 from Gampaha.

Forty deaths have also taken place.

The IDH hospital in Mulleriyawa has extended the hours of treatment at its OPD for dengue patients until 8.00 pm.

Around 200,000 dengue mosquito breeding places have been identified in raids of one million places during the year.

The spreading of dengue in schools has now risen to 38 per cent from 32 pc in 2015, and at construction sites to 40 pc from 38 pc.