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    • Keywords


      An. culicifacies sibling species; An. stephensi variants; malaria; sporozoites

    • Abstract


      Sporozoites were detected in naturally infected sibling species of the primary rural vector Anopheles culicifacies complex in two primary health centres (PHCs) and a variant of the urban vector Anopheles stephensi in Mangalore city, Karnataka, south India while carrying out malaria outbreak investigations from 1998–2006. Sibling species of An. culicifacies were identified based on the banding patterns on ovarian polytene chromosomes, and variants of An. stephensi were identified based on the number of ridges on the egg floats. Sporozoites were detected in the salivary glands by the dissection method. Of the total 334 salivary glands of An. culicifacies dissected, 17 (5.08%) were found to be positive for sporozoites. Of the 17 positive samples, 11 were suitable for sibling species analysis; 10 were species A (an efficient vector) and 1 was species B (a poor vector). Out of 46 An. stephensi dissected, one was sporozoite positive and belonged to the type form (an efficient vector). In malaria epidemiology this observation is useful for planning an effective vector control programme, because each sibling species/variant differs in host specificity, susceptibility to malarial parasites, breeding habitats and response to insecticides.

    • Author Affiliations


      Susanta Kumar Ghosh1 Satyanarayan Tiwari1 Kamaraju Raghavendra2 Tiruchinapalli Sundaraj1 Aditya Prasad Dash1

      1. National Institute of Malaria Research (ICMR), Epidemic Diseases Hospital, Old Madras Road, Bangalore 560 038, India
      2. National Institute of Malaria Research (ICMR), 22 Sham Nath Marg, Delhi 110 054, India
    • Dates

  • Journal of Biosciences | News

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      Posted on July 25, 2019

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