Training Module for Medical Officer - NVBDCP

f. Anopheles dirus: Vector in forested and forest fringe area in the northeast.Highly exophilic and exophagic and difficult to ). Breed in small,transient, partly shaded pools in forest areas (eg. Elephant footprints)g. Anopheles annularis: Mainly a secondary vector, which is common incentral India and Orissa.h. Anopheles philippinensis: It is incriminated as a vector in deltaic West Bengaland N.E. India. Breeds mainly in paddy fields.i. Anopheles varuna: Secondary vector in Andhra Pradesh, Jharkhand andOrissa.2.7 Bionomics of important vector species. The behaviour of the fourimportant vector species is given below:Site ofbreedingZoophilic/anthropophilicSeasonalityPeakTime ofbitingAn.culicifaciesWater inpaddyfields,wells,irrigationwells, stepwells,ponds,cattlewaterstorages,cattle footprintsZoophilic;OccasionallyanthropophilicPeaksduringmonsoonmonthsVaries –(1900 to0400)An.stephensiClean waterin watertanks, waterlogged intrenches,large cleanwaterpuddles,upturnedcans, etcZoophilic/Anthropophilic accordingto availabilityRainymonthsVaries-(2200 tomidnight)An.fluviatilisRockpools, hillystreams,pondsAnthropophilicPeaks inlatemonsoonsand earlywintermonthsLate night(2300 to0300)An.minimusShadedslow flowingstreamswith grassymargins,swamps,ditches,channelsHighlyanthropophilicPerennial1800 to 1900(Outdoors);Midnight to0200(Indoors)An. dirussmall,transient,partlyshadedpools inforestareas (eg.Elephantfootprints)HighlyanthripophilicRainymonths2100 –03:00 Hrs16