High rises responsible for over 50pc Aedes production in capital

Staff Correspondent

1 February, 2021 12:00 AM printer

The high-rise and under-construction buildings are responsible for over 50 percent breeding ground of Aedes mosquito in the capital, said a survey report.

The report also disclosed that the rate of density of Aedes mosquito, vector of dengue disease, has been found lower than normal in some areas in the capital during this winter.

Afsana Alamgir Khan, deputy manager, National Malaria Elimination and Aedes Transmitted Diseases Control Program, presented the report at a function at the Directorate General of Health Services (DGHS) on Sunday.

DGHS has identified five areas under Dhaka North City Corporation (DNCC) and five under Dhaka South City Corporation (DSCC) as more prone to a higher reproduction of Aedes mosquitoes than the remaining parts of the capital.

In the study titled “Post Monsoon Aedes Survey-2020,” released on Sunday, the DGHS also mentioned that multi-storey buildings account for more than half 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 10-day study beginning from December 18, 2020. The survey continued until December 27 at 3,000 households in 100 areas in the capital.

The highest Breteau Index (BI) of 16.67 was found in Mirpur Section 10, 11, Gulshan, Bnanni and Niketon areas falling under Dhaka north ward No 3 and 19.

On the other hand, the BI of 16.67 was found in Radhikamohon Bosak Lane, Awlad Hossain Lane, Court House Street, Shankhari bazaar and Rai Saheb Bazar areas falling under Dhaka south ward No 36.

BI measures the number of water-holding containers infested with larvae per 100 houses.         

The study also found that 51.34% Aedes mosquito breeding grounds are in high-rises, whereas the figure for under-construction buildings is 20.32% in slum areas the figure is 12.83%, in single building 12.57% and 2.94 percent in empty land.

Among the positive containers of the Aedes mosquito, 15.57 per cent was stagnant floor water, 12.57 per cent were plastic drum, 9 per cent were plastic bucket, 8.52 per cent were used abandoned tyre, 8.27 per cent were flower tub and tray, 6.08 per cent were water tanks, 5.11 per cent were earthen pot, 3.65 per cent were plastic bottles, 3.16 per cent were tin buckets, and 2.92 per cent were plastic mugs.

Prof Dr ABM Khurshid Alam, director general of the DGHS, Prof Dr Nasima Sultana, additional director general, Dr. Baizid Khurshid Riaz, Director, NIPSOM were among others present in the function. Dr. Md. Nazmul Islam, Director (Disease Control) presided over the programme.