Under the National Vector Borne Disease Control Programme (NVBDCP), which of the following insecticides is currently recommended for Indoor Residual Spraying (IRS) in high-malaria-burden districts in India?

• A DDT (Dichlorodiphenyltrichloroethane)
• B Malathion
• C Permethrin-impregnated bed nets only, IRS not recommended
• D Bifenthrin or Pirimiphos-methyl (pyrethroid or organophosphate) ✓

Explanation

India's NVBDCP guidelines recommend pyrethroid-based insecticides (e.g., alpha-cypermethrin, bifenthrin) or organophosphate compounds (pirimiphos-methyl) for IRS in high-malaria-burden areas, especially where DDT resistance has emerged. DDT is still used in some areas but resistance is widespread. Malathion has been used historically but is being phased out. Long-lasting insecticidal nets (LLINs) complement but do not replace IRS. WHO prequalified insecticides are used based on local vector resistance profiling.

Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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