WHO South-East Asia Journal of Public Health
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Year : 2014  |  Volume : 3  |  Issue : 1  |  Page : 81-84

Monitoring the durability of long-lasting insecticidal nets in field conditions in Nepal

1 School of Public Health, Tropical Medicine and Rehabilitation Sciences, James Cook University, Australia
2 Epidemiology and Disease Control Division, Department of Population Health, Kathmandu, Nepal
3 Kantipur College of Medical Sciences, Kathmandu, Nepal
4 Vector-Borne Disease Research and Training Center, Department of Population Health, Hetauda, Nepal
5 Country Office and South-East Regional Offices, World Health Organization, Nepal and India

Correspondence Address:
J Hii
School of Public Health, Tropical Medicine and Rehabilitation Sciences, James Cook University, QLD 4811
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DOI: 10.4103/2224-3151.206891

PMID: 28607260

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Understanding and improving the durability of long-lasting insecticidal nets (LLINs) in the field is critical for the success of malaria prevention using mosquito nets, as well as contributing to procurement decisions based on the number of years of protection, rather than the current practice of unit cost. Using the recently published guidelines from the World Health Organization (WHO) some progress has been made in the monitoring and assessment of performance of nets in the field. This paper describes the protocol of an ongoing retrospective study of the attrition rate, physical integrity and bioefficacy of three polyester LLIN products that were distributed during 2010 to 2013 in Nepal. It is hoped that robust and auditable data on net survival (physical integrity and bioefficacy) of these three brands in different environments will assist the Nepal National Malaria Control Programme in planning future LLIN-replacement strategies, including behaviour-change communication about LLIN care and maintenance. The advantages and disadvantages of prospective and retrospective cross-sectional approaches are discussed, including appropriate strategies to validate the timing for mass distribution of nets. Similar studies should be done in other countries to (i) track LLIN durability to support management of resupply, and (ii) inform procurement decisions at the global level. New, more predictive, textile laboratory testing is also urgently needed.

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