Larvae was also found in unauthorised water tanks, buckets and large drums in several houses. But, the residents were let off with just a warning. However, water connection would be severed if larvae was found again on their premises, a senior officer said. More than 5,000 cases of malignant malaria were reported last month. Six persons have died in malaria this month.
Officials admit the anti-malaria campaign lacks uniformity.
The chief medical and health officer, Dr Sujit Ghosh, said corporation workers are too thinly spread to check houses at regular intervals. Equipment, too, is not enough. Overhead and underground tanks are checked only after a malaria death is reported from a house. Corporation workers get busy with their fogging machines after one of the residents visit the local lab to get his blood tested. In Kalighat, brick tanks in highrises under construction is a breeding ground for larvae.