SINGAPORE - The biggest dengue cluster in Singapore has closed, thanks to collective efforts to stem mosquito breeding in the area.

The cluster, located in Tampines Polyview, had racked up 278 cases since the first case was reported in November last year.

A dengue cluster is formed when two or more cases are detected within two weeks and are located within 150m of each other.

But it was no longer listed on the National Environment Agency's (NEA) dengue website as of Feb 18, the same day the agency announced that dengue cases could reach a record high of over 30,000 this year.

The biggest dengue cluster listed is now located in Yishun Ring Road and Yishun Street 81, with 109 cases. Nine cases have been reported in the area over the last two weeks.

The Tampines Town Council had first announced the cluster's closure on its Facebook page on Feb 19. It added that another large dengue cluster, located in Tampines Central, was also closed.

"Kudos to the collective efforts of Tampines residents, schools, contractors, conservancy workers, shop owners and NEA for constantly keeping an eye out for potential breeding sites and promptly giving us feedback on these areas, allowing us to follow up promptly," the town council said in its post.

But it warned the public not to let their guard down and said it would continue with inspections, educational efforts and the oiling of drains.

"We also encourage all residents to continue practising the 10-minute five-step Mozzie Wipeout regularly to prevent mosquito breeding," the post added.

"Let's strive towards making Tampines dengue-free!"

Last month, Minister for the Environment and Water Resources Masagos Zulkifli visited the Tampines Polyview cluster, revealing that NEA officers had been carrying out inspections at night and on weekends on top of their regular checks.

Mr Masagos, who is also an MP for Tampines GRC, put out a call for volunteers to help distribute repellents in the affected areas and create awareness of the dengue situation.