Coating formulation change is the root cause for inferior bioefficacy of long-lasting insecticidal nets in Papua New Guinea
Bubun, N.; Anetul, E.; Koinari, M.; Freeman, T. W.; Karl, S.
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Abstract/SummaryIn a study published in Nature Communications in August 2020, we demonstrated an abrupt decrease in the bioefficacy of long-lasting insecticidal nets (LLINs) for malaria prevention delivered to Papua New Guinea (PNG) between 2012 and 2013. This coincided with a rise in malaria cases in the country. At the time of publication of the original article, we were unable to pinpoint the exact reasons for the observed shift towards inferior product performance and stated that further studies are required to determine the underlying cause of the observed reduced bioefficacy of these LLINs 1. Due to the potentially significant public health implications (hundreds of millions of this specific LLIN product had been distributed globally), our study led to discussions and speculation among stakeholders. Here, we present data unequivocally showing that the observed reduction in the ability to kill mosquitoes of these LLINs is a direct result of a manufacturing change that occurred at the same time.
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