Comparison among homemade repellents made with cloves, picaridin, andiroba, and soybean oil against Aedes aegypti bites

A popular Indian clove-based mosquito repellent is a false economy

“…However, all these extracts had very low concentrations of eugenol thus suggesting that following the original protocol (even with 30 g per 500 ml) may lead to inactive extracts. Using an arm-in-cage set-up, Miot and collaborators found no significant difference in repellency when comparing arms treated with this homemade recipe and untreated arms 15 . By contrast Affonso and collaborators reported that clove buds ethanolic extracts obtained by static maceration showed repellence activity against the yellow fever mosquito, Ae.…”

Efficacy of the main repellents available in the Brazilian market against Aedes aegypti bites under concentrations applied to pediatric populations

“…The experiment was carried out by 5 healthy adults who exposed their forearms to 30 healthy adult females A. aegypti (Rockfeller strain) retained on transparent plastic beds treated with 5% glucose solution and submitted for fasting blood feeding for 24 hours 8 . The mosquito breeding laboratory included temperature, humidity, and illumination control to standardize the experimental conditions, being maintained by the Department of Parasitology, Instituto de Biociências, Universidade Estadual Paulista (IBB-UNESP), Botucatu-SP.…”

“…The time (in seconds) of the exposure to the first mosquito bite in each forearm without products and with bilateral combinations of the main Brazilian commercial repellents with pediatric indications was measured. Each experiment, therefore, resulted in three measures 8 .…”

“…If no bites occurred, the study was interrupted in 10,800 s (3h). Mosquitos were replaced if necessary (in cases of death, flight, or loss of vitality) 8 . Data normality was assessed using the Shapiro-Wilk test 9 .…”

Conhecimentos, crenças e práticas em relação à dengue

“…Uma minoria afirmou se prevenir do mosquito a partir da planta ou produtos de citronela (Cymbopogonwinterianus) (1,2%) e por meio de repelentes domésticos (1,5%). Apesar de dados da literatura sugerirem que alguns repelentes produzidos a base de óleo de plantas tenham certa eficácia na prevenção de doenças transmitidas por picadas de insetos (Fradin e Day, 2002;Miot et al, 2011;Silva, 2014), eles costumam ser altamente voláteis e, portanto, com efeito de curta duração (Stefani et al, 2009;Fradin, 1998). Dessa forma, é importante que o uso destes não substitua as práticas preventivas usuais da população.…”