Chemical Composition of Cinnamomum Cassia Oil in Vietnam and Its Spatial Repellent Effects Against the Aedes Aegypti

Abstract

Dengue is a mosquito-borne viral disease that has caused millions of dengue virus infections per year in the world. Mosquito repellent is an effective way to prevent mosquito bites and the spread of mosquito-borne disease. In this study, we extracted essential oil from the bark of Cinnamomum cassia collected in Viet Nam and analyzed its chemical composition. We then evaluated the spatial repellent of the essential oil basing on WHO guidelines. The essential oil was hydro-distilled and extracted with chloroform to obtained an average yield of 2.55% (w/w). The main component of oil is trans-cinnamaldehyde with a content of 99.24%. The repellent index of essential oil at concentrations of 25%, 15%, 5%, 1% and DEET 10% after 90 minutes was 73.33%, 57.14%, 33.33%, 17.65% and 12.50%, respectively. In conclusion, the Cinnamomum cassia essential oil is an effective and promising repellent in preventing dengue mosquitoes.