In vitro efficacy of three novel delousing formulations against the head louse (Pediculus capitis L.)

: A total of 498 head lice (2nd and 3rd instar larvae, females and males) combed out of the hair of 38 children, were exposed to the delousing formulations Diffusil H Forte Spray (carbaryl 1%), Diffusil Care (isopropyl myristate, cyclomethicone, and dimethiconol) and Paranit (coconut oil, anise oil, and ylang ylang oil) in in vitro tests. The first two formulations, i. e. Diffusil H Forte Spray and Diffusil Care, caused 100% mortality of exposed lice, while Paranit only killed 12.2% of exposed lice.