Global Experts Meeting on Infectious Diseases
Rajendra Memorial Research Institute of Medical Sciences, India
Title: Experiencing and comparing the efficacy of SP-IRS versus DDT-IRS for controlling VL vector at Bihar
Biography: Vijay Kumar
In Bihar, phlebotomine sand flies were supposed to be highly susceptible to organochlorine insecticides but preferably and injudicious application of DDT for controlling VL vector had imposed the situation of vector resistance, where spraying with DDT has continued since 1976. In this regard, pyrethroids being synthetic analogues of pyrethrins, effectively deployed for controlling malaria vector population with satisfactory results. But, mass application and replacement of Alphacypermethrin 5% with DDT, for controlling VL vector population had never been reported in context to Indian scenario. With financial support and supervision of NVBDCP, study was implemented purposely to monitor and evaluate the efficacy of Alphacypermethrine 5% as SP-IRS and comparing those with DDT-IRS for controlling VL vector at Bihar regime. Under the sanctioned project in year 2016, villages Vaishali (high endemic district) and Samastipur (low endemic district) were selected and targeted for intervention with SP-IRS i.e., 5% Alphacypermethrin while the village of Patna served as positive control arm for the treatment with 50% w.p DDT. Following to the IRS intervention at selected sites, efficacy of Alphacypermethrin was evaluated and compared with those of DDT for their residual effect using the WHO cone bioassay and monthly sand fly collection.