Author:
Koinari Melanie,Amos Brogan,Townsend Michael,Karl Stephan
Abstract
AbstractMosquito repellents are important for personal protection against nuisance and potentially infectious mosquito bites. Repellent activity of Australian Blue Cypress (ABC) essential oil and a commercially formulated skin lotion containing ABC oil were compared with 20% DEET (N, N-diethyl-3methylbenzamide) and evaluated against mosquitoes under laboratory and field conditions in North Queensland, Australia. Using the arm-in-cage method, the following cumulative doses of ABC oil in ethanol were tested; 0.5%, 1.5%, 3%, 5%, 7.5% and 10.5% against femaleAedes aegypti. In the field, 2.5%, 5% and 10% of diluted ethanolic ABC oil were tested using the human landing catch method. We observed a dose-dependent increase in protection with diluted ABC oil approaching 80% at high concentrations. While some protection was afforded, mosquito landing and probing was still recorded immediately after application (laboratory) for both ABC essential oil and skin lotion. Protection declined from 80 – 70% and 93 – 50% for 20% ABC oil (laboratory) and 10% ABC oil (highest dose, field), respectively. For the formulated product, protection declined from 85 – 75% in the laboratory and from 63 – 50% in the field. To conclude, both ABC essential oil and the formulated skin lotion provided moderate protection against mosquito bites, which decreased soon after application.
Publisher
Cold Spring Harbor Laboratory
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