The multi-storey buildings and under-construction concrete structures are mainly responsible for reproduction of Aedes mosquito in the capital, says a press release.
The information was disclosed on Thursday by a survey conducted by Directorate General of Health Services (DGHS).According to the press release signed by DGHS Director (Disease Control) Dr. Md. Nazmul Islam, four areas under Dhaka North City Corporation (DNCC) and six areas under Dhaka South City Corporation (DSCC) have been identified as more prone to a higher reproduction of Aedes mosquitoes in the capital.
In the study titled “Pre Monsoon Aedes Survey-2021,” the DGHS mentioned that multi-storey buildings and under-construction buildings are account for around 80 percent of the city’s Aedes mosquito breeding grounds.
A team of researchers working under National Malaria Elimination and Aedes Transmitted Diseases Control Program of the DGHS conducted the seven-day study beginning from March 29, 2021. The survey continued until April 4 in 70 areas of the capital.
The highest Breteau Index (BI) of 23.3 was found in Lalmatia and Iqbal road areas of ward no. 32 in Dhaka North City Corporation. On the other hand, the BI of 20.0 was found in Sayedabad and Uttar Jatrabari areas falling under Dhaka south city corporation ward No 48.
BI measures the number of water-holding containers infested with larvae per 100 houses.
The study also found that 45.24% Aedes mosquito breeding grounds are in high-rises, whereas the figure for under-construction buildings is 34.52%, 15.48% in single buildings and in slum areas the figure is 4.76%.Among the positive containers of the Aedes mosquito, 20.22 per cent was stagnant floor water, 19.10 per cent were plastic drum, 11.24 per cent were plastic bucket, 7.77 per cent were water tank, 2.25 per cent were flower tub and tray, 4.49 per cent were plastic bottles and 3.37 percent lift holes.