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Article Publish Status: FREE
Abstract Title:

Better than DEET Repellent Compounds Derived from Coconut Oil.

Abstract Source:

Sci Rep. 2018 Sep 19 ;8(1):14053. Epub 2018 Sep 19. PMID: 30232355

Abstract Author(s):

Junwei J Zhu, Steven C Cermak, James A Kenar, Gary Brewer, Kenneth F Haynes, Dave Boxler, Paul D Baker, Desen Wang, Changlu Wang, Andrew Y Li, Rui-de Xue, Yuan Shen, Fei Wang, Natasha M Agramonte, Ulrich R Bernier, Jaires G de Oliveira Filho, Ligia M F Borges, Kristina Friesen, David B Taylor

Article Affiliation:

Junwei J Zhu

Abstract:

Hematophagous arthropods are capable of transmitting human and animal pathogens worldwide. Vector-borne diseases account for 17% of all infectious diseases resulting in 700,000 human deaths annually. Repellents are a primary tool for reducing the impact of biting arthropods on humans and animals. N,N-Diethyl-meta-toluamide (DEET), the most effective and long-lasting repellent currently available commercially, has long been considered the gold standard in insect repellents, but with reported human health issues, particularly for infants and pregnant women. In the present study, we report fatty acids derived from coconut oil which are novel, inexpensive and highly efficacious repellant compounds. These coconut fatty acids are active against a broad array of blood-sucking arthropods including biting flies, ticks, bed bugs and mosquitoes. The medium-chain length fatty acids from Cto Cwere found to exhibit the predominant repellent activity. In laboratory bioassays, these fatty acids repelled biting flies and bed bugs for two weeks after application, and ticks for one week. Repellency was stronger and with longer residual activity than that of DEET. In addition, repellency was also found against mosquitoes. An aqueous starch-based formulation containing natural coconut fatty acids was also prepared and shown to protect pastured cattle from biting flies up to 96-hours in the hot summer, which, to our knowledge, is the longest protection provided by a natural repellent product studied to date.

Study Type : Animal Study

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