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  • Title: Malaria control utilizing Bacillus sphaericus against Anopheles stephensi in Panaji, Goa.
    Author: Kumar A, Sharma VP, Sumodan PK, Thavaselvam D, Kamat RH.
    Journal: J Am Mosq Control Assoc; 1994 Dec; 10(4):534-9. PubMed ID: 7707060.
    Abstract:
    In a large malaria endemic area in Panaji city, Goa, India, the weekly application of the biolarvicide Bacillus sphaericus (Strain 101, Serotype H 5a 5b) at the rate of 1 g/m2 in the main Anopheles stephensi larval habitats, viz., curing waters, masonry tanks, and sump tanks (under construction), from April to December 1993 resulted in a sharp decline in the habitat positivity (range 0.13-8.0%) as compared with the rest of the Panaji (range 2.2-30.6%) where temephos (Abate) was used as the larvicide. Bacillus sphaericus spraying also led to a significant decline in anopheline densities in positive habitats (range 0-7.3/10 dips) as compared with control habitats (range 0.9-53.0/10 dips). Concurrently, malaria incidence observed in the experimental area (slide positivity rate [SPR] range 2.3-7.8%; monthly parasite index [MPI] range 0.18-1.44) was lower than in the control area (SPR range 14.3-25.5%; MPI range 1.75-6.12).
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