Evaluating the efficacy of a new lice treatment shampoo containing Quassia Amara using physical and tolerance approaches

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Abstract Many methods for evaluating head lice treatment products through field reports and chemical methods have been reported, and these results are incomparable due to several physical limiting factors, including hair type, application protocols and traditional hygiene practices. The present study investigated physical factors related to the efficacy of a new louse treatment with 5% Quassia Amara using a factorial model. The model terms included hair type (≤5 or > 5 cm), age (6-18 years), stroke caused by shampoo (2-6) or comb (1-4), and duration of exposure (10-20 min) according to the factorial model. A Lice stress resistance assessment technique was used to comparatively assess the effectiveness of the new product named Go Away Lice and two commercial louse treatment products. The results of the factorial model showed that the new shampoo product containing Quassia a. had a significant effect on the number of dead lice and nits at different ages and on different hair types (P< 0.05). Dead lice and nit were significantly associated with the interaction influence of age and hair size (P< 0.05). The stress tolerance limits of the two commercial head lice brands and the local brand were comparable to that of the most effective commercial brand in terms of killing capacity (P > 0.05). It was concluded that a reduction in the lice population is significantly influenced by age and hair size. The Goaway Lice Shampoo brand demonstrated potential as a cosmetic for head lice treatment.

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