As of the end of July, number of Dengue cases in Bishan peaks 230, a figure significant enough to trigger red-alert level in the area. Despite the sophisticated surveillance and precaution measures taken by the government, the rising number of Dengue cases is alarming. There were 37 Dengue clusters, and seven of them have red-alert level which indicates 10 or more reported cases in those areas in the previous fortnight. At the top of the unwanted list were two clusters in Bishan, covering Bishan Street 22, 23, 24 and 25.

"When I opened the door (one time), there were a few mosquitoes and that's when I called the authorities to give them details, especially when they came in through the windows and door," said Daniel Ng, 58, who lives in Block 228 at Bishan Street 23.

Some residents relate the rising number of Dengue cases to the recent lift upgrading and repainting work, stating that these projects provided ideal breeding sites for Aedes mosquitoes. Some said the construction workers often wash equipment and dump the water at water points at HDB blocks, which accumulates when drains are clogged. The stagnant water thus becomes the breeding spot for Aedes mosquito.

The National Environment Agency (NEA) is urging residents, contractors and business owners to play their parts in eradicating sources of mosquito breeding habitats. Officers have been inspecting homes in Bishan and residents are given insect repellents and granular insecticide.


References:
http://www.channelnewsasia.com/news/singapore/more-dengue-cases/1959036.html
http://www.dengue.gov.sg/subject.asp?id=74