基孔肯雅热：家家点蚊香靠谱吗？

Core Viewpoint - The effectiveness of mosquito coils as a protective measure against the ongoing high incidence of Chikungunya virus in Guangdong is questioned, particularly due to the development of resistance in mosquitoes to the active ingredients in these products [1][6][15] Group 1: Composition and Mechanism - The main active ingredient in mosquito coils is pyrethroids, which are synthetic compounds similar to natural pyrethrins derived from the chrysanthemum plant [3][4] - Pyrethroids work by delaying the closure of voltage-gated sodium channels in insect nerve cells, leading to over-excitation and eventual paralysis and death of the insects [3] Group 2: Resistance Issues - Many mosquitoes, including the primary vector for Chikungunya, Aedes albopictus, have developed resistance to pyrethroids, with studies showing that mortality rates in these mosquitoes rarely exceed 40% when exposed to commonly used pyrethroid insecticides [6][7] Group 3: Behavioral Factors - Aedes albopictus is primarily active during the day and tends to remain outdoors, making traditional nighttime use of mosquito coils less effective against them [11][12] Group 4: Health and Safety Concerns - Traditional mosquito coils can contribute to indoor air pollution, with studies indicating that the PM2.5 levels during use can exceed safe limits by 1.59 to 7.42 times [13] - There are also fire hazards associated with the use of mosquito coils, as evidenced by incidents like the tragic fire at a summer camp in South Korea, which was caused by unattended coils [14]