Via the Mail Online: Mosquitoes are now 'resistant' to the chemicals used in fumigation drive to tackle dengue and chikungunya crisis. Excerpt:
Experts have warned the Delhi government's fogging exercise is 'ineffective' in tackling the capital's growing dengue and chikungunya crisis.
They claim that there is no evidence to show that the government-led fumigation exercise is reducing the numbers of disease-spreading mosquitoes, with some data suggesting that the vectors have become 'resistant' to the chemicals used.
Dr Randeep Guleria, head of department of pulmonary medicine at the All India Institute of Medical Sciences (AIIMS), said that, at the very best, the fogging drive was merely a containment measure, rather than a preventative one.
He said: "The data to suggest that fogging actually decreases number of mosquitoes is not very strong.
"Fumigation is not a preventive measure but only a containment measure. It is a high-risk formula with only psychological effects. It makes people feel safer."
According to Guleria, there is data which suggest that mosquitoes have in fact become resistant to the chemical used in fumigation and may not die.
He continued: “Fumigation is not fool-proof. Dengue has to be controlled at the larval stage.”
Leader of House in SDMC and former South Delhi mayor Subhash Arya, said: “Fogging is mostly done outside the houses which can be effective only for five to 10 minutes and then it gets mixed in the air and, hence, there will be no impact on the mosquitoes.”
Meanwhile, doctors have issues a warning about the serious health implications to humans in the pesticide drive.
The fogging machines used by the municipal corporations in Delhi spray 95 litres of diesel mixed with insecticides in an hour.
According to doctors, one of the insecticides used for fumigation is malathion which can be hazardous for humans, especially for the vulnerable, young and elderly groups.
It's claimed that it can have chronic long term effects and can cause short term breathing problems and headaches in healthy people, with it posing an even greater threat to those with pre-existing breathing difficulties.