Density and Susceptibility Status of Malaria Vectors of Chilkuti Area, Bastar, Chhattisgarh
Abstract
Introduction: The study was carried out in Chilkuti, a village 22 km from Jagdalpur in Bastar Division of Chhattisgarh State, India. The malaria incidence of this area was declined with distribution of insecticide treated LLINs to the villagers. The present study aims to find out the vector density and insecticide susceptibility status of vector mosquitoes of the area.
Methods: Adult mosquito collections were done from both cattle shed and human dwelling by hand catch method and per man hour density calculated to compare the density of mosquitoes. The susceptibility/ resistance status against the conventional insecticides as per NVBDCP guidelines was evaluated by WHO susceptibility kit. Correlation of climatic factors and vector density was evaluated by SPSS version 20. Knock-down time (KDT50 and KDT 99) along with slope and 95% confidence interval (CI) was determined using Ldp Line computer programme.
Result: The vector density was evaluated regularly and found to be the density of Anopheles culicifacies Giles, the major vector of malaria in the area getting reduced and in the meantime the density of Anopheles subpictus Grassi, is increasing. Though the An. culicifacies density found reducing and the cases of malaria were reported from the area indicating the possibility of another vector may be playing the role in parasitic transmission in the area. As per the previous study from NCDC Jagdalpur, the presence of sporozoites was confirmed in An. subpictus and anthropophilic index indicated the chance of its vectorial capacity in Jagdalpur area, Bastar division So the present study focused on both these mosquitoes. The susceptibility tests shown that there is variation in the susceptibility/resistant status of both the mosquitoes against the different classes of insecticides.
Conclusion: The results of the study exhibit the need of further exploratory research studies confirming the vectorial capacity of An. subpictus and alternate measures to control malaria transmission.
How to cite this article:
Anju Viswan K, Devanagan TP, Korram RL, Jogdand SS, Jain SK, Singh SK. Density and Susceptibility Status of Malaria Vectors of Chilkuti Area, Bastar, Chhattisgarh. J Commun Dis 2019; 51(4): 10-15.
DOI: https://doi.org/10.24321/0019.5138.201931
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