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J Parasit Dis Diagn Ther 2017 | Volume 2 Issue 4
International Conference on
Zoology, Microbiology & Medical Parasitology
October 30-November 01, 2017 | Chicago, USA
Background & objective:
Rainfall has been associated with
mosquitoes breeding and abundance of population. It is
an abiotic factor that affects the growth, development and
survival of mosquito. The main objective of this study was
to assess the impact of rainfall on larval density of malaria
vectors in aquatic habitats.
Methods:
Four study sites Katha, Khekra, Baragaon and main
Baghpat were selected based on high malaria cases and
availably of breeding habitats. Larval sampling was done by
dippingmethod before and after rainfall within a period of 2-3
days. Larvae collected from the field, transported in plastic
container and reared in the laboratory for adult emergence
and identification. Adult mosquitoes were identified with
the help of standard identification key under the dissecting
microscope. The amount of rainfall (mm) was measured
using a rain gauge, which was installed at Khekra study site
of district Baghpat. The correlation analysis was applied for
relationship between anopheline larval density and rainfall
data (mm). Anopheles culicifacies and Anopheles stephensi
dominant species of malaria vectors has been reported from
selected localities of district Baghpat, Uttar Pradesh.
Result:
We observed that rainfall of 45.6 mm significantly
reduced larval density in both permanent and temporary
habitats by 8.32 and 2.16 larval density/ dip respectively.
Positive co-relation (r = 0.20), and (r = 0.31) was observed
between rainfall and larval density after rainfall in permanent
and temporary breeding habitats respectively.
Interpretation & conclusion:
The adverse effect of rainfall on
larval density could be attributed to flushing out of larvae
from their breeding habitats. The critical amount of rainfall
required for flushing out larvae was found to be 45.6mm.
Anopheles culicifacies and Anopheles stephensi emerged
from collected larvae.
Keywords:
Malaria vectors, rainfall, larval density, habitat.
e:
r.c.dhiman@gmail.comImpact of rainfall on larval density of malaria vectors in district Baghpat, Uttar Pradesh
Bijendra Kumar, N Singh
and
Ramesh C Dhiman
HNB Garhwal University, Uttarakhand