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age groups annularis Anopheles Anopheles sundaicus anopheline anopheline mosquitoes anti-malaria arsenious oxide atebrin average Bannu benign tertian Bhuj breeding places Calcutta canal Cantonment cent collected Covell crescent carriers Culex Culex fatigans culicifacies culicine cynomolgi Delhi density of infection dissected district drainage eggs endemic enlarged spleens epidemic falciparum females float fluviatilis gametocytes Ibid Idem Idem Idem immunity India investigations irrigation irrigation channels irrigation water July knowlesi Kutch large number larvae larvicide malaria control malaria season Malaria Survey Manama mandailing measures monkeys months mosquitoes mysorensis nullah Number of parasites observations oocysts palpable parasite counts parasite index parasites paris green Pattukkottai taluk Pattukkottai town percentage peripheral blood Phlebotomus Plasmodium plasmoquine population quinine recorded schizonts Senior White Sinton spleen rate splenic sporozoites spraying subpictus sundaicus Surv swarming Table tanks tertian tion total number treatment trophozoites varuna Vijaya Vilas Palace villages vivax