Monitoring Susceptibility Status of Phlebotomus argentipes (Diptera:Psychodidae) at Bihar (India) for the Procurement of Homozygous DDT Resistant Colony

Rama, Aarti; Kumar, Vijay; Kesari, Shreekant; Singh, Vijay Pratap; Das, Pradeep

doi:10.4172/2329-891x.1000170

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…Hence, remained highlighted as a first line VL vector control chemical option since 1953 [10,11]. After the decades of extensive application of DDT, P. argentipes had attained tolerance/ resistance against it [12,13] which is continuing till date [14,15,16,17]. Due to this, flaring-up of VL cases with diminishing effect of DDT spray was observed [11] that supported the non-decrement in vectorial population too (Kumar et al Personal communication).…”

Section: Introductionmentioning

confidence: 99%

Understanding Behavioural Temperament of Phlebotomus argentipes Under the Influence of DDT-IRS Versus SP-IRS for Scoping New Approaches for Maximum Control Over the VL-Vector Population in Bihar

Kumar

Rama

Mandal

et al. 2019

IJTDH

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Background: After the decades of Dichlorodiphenyltrichloroethane (DDT) use, Phlebotomus argentipes reportedly developed resistance against it affecting every aspect of vector control at grass-root level. Although DDT based Indoor Residual Spray (IRS) has been replaced with Alphacypermethrine-a Synthetic Pyrethroid (SP) based insecticide, since 2016 but its successful implementation at the Visceral Leishmaniasis (VL) endemic regime of Bihar doesn’t cause much effect upon VL vector density. Furthermore, the outcomes of existing operational research works, it had been observed that VL vectors are continuously changing its behavior under the pressure of insecticides. Methods: For validating the hypothesis, present study has been carried out at Vaishali and Patna being highly and semi-endemic sites respectively for quantifying the oriental behavior among VL vectors persuaded by the IRS and enforce them to remain alive and get trapped in light trap even after changed chemical composition of IRS i.e., SP-IRS from routine DDT-IRS. Results: Following results, a significant reduction in sand fly density (i.e., 33.09% and 29.16%) was observed for outdoor and indoor caught sand flies, collected with light trap and aspirator respectively. Significant higher no. of sand fly collection in terms of per light traps per night was recorded from the outdoor sites than those from indoor habitat for each village of Vaishali and Saran district of Bihar. Higher no. of male sand flies than to that of female ones were collected from outdoor sites and only unfed female sand flies (i.e., 100%) were caught following SP-IRS from each study villages of Vaishali and Saran districts of Bihar. Conclusions: The results of higher no. of sand flies collection from the outdoor sites as compared with the indoor habitat validate the hypothesis of gradual shifting of habitat of VL vectors from endophilic to exophilic which is undoubtedly followed due to the fact of developed resistance among them against chemical constituent of IRS. Results provide very useful information about the sand fly dynamics under the impact of IRS and accordingly, advocates the combined approach of IRS along with insecticidal fogging together at a same time that could be an effective dividend for maximum VL vector control along for negotiating VL cases at par for longer duration during the maintenance phase at the VL foci.

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Section: Introductionmentioning

confidence: 99%