Mishra AK, Bharti PK, Kareemi TI, Chand SK, Tidgam AS, Sharma RK, Singh N. Field evaluation of zero vector durable lining to assess its efficacy against malaria vectors and malaria transmission in tribal areas of the Balaghat district of central India.
Trans R Soc Trop Med Hyg 2019;
113:623-631. [PMID:
31251386 DOI:
10.1093/trstmh/trz046]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 03/22/2019] [Accepted: 06/20/2019] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND
Indoor residual spray (IRS) and long-lasting insecticidal nets are the two principal intervention methods of vector control. Zero vector durable lining (ZVDL), a relatively new vector control method, was evaluated to assess its efficacy against malaria vectors in hard to reach areas in the Balaghat district, where malaria transmission is perennial.
METHODS
ZVDL was installed in six experimental villages during November-December 2012. In control villages, IRS was carried out with Alphacypermethrin. Cone bioassays were performed to assess the efficacy and persistence of insecticide-treated ZVDL following WHO bioassays.
RESULTS
The mean per man hour density of Anopheles caught during 2013 was 12.1 in experimental villages and 16.2 in control villages. No sporozoite-positive Anopheles culicifacies were found in experimental villages; however, in control villages, four sporozoite-positive A. culicifacies were found (two Plasmodium vivax and two P. falciparum). The knock-down rate of A. culicifacies was 95-100% with 100% mortality during the 24 h recovery period. Malaria declined sharply in experimental villages showing a slide positivity rate of 22.3% compared with control villages (36.4%) (p<0.05).
CONCLUSIONS
A supplementary vector control intervention such as ZVDL has the potential to become a viable alternative to IRS in malaria endemic areas.
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