In the present scholarly study, a critical, multidimensional reassessment of currently operative infection-control protocols within the professional nail industry is undertaken, grounded in engineering design principles and the methodological toolkit of contemporary epidemiology. The purpose of the work is the theoretical validation and applied development of an updated safety model in which administrative regulations are integrally aligned with technologically advanced solutions aimed at reducing occupational and client-facing risks. The methodological framework of the study is established through a systematic analysis of the academic corpus of publications from recent years, a content analysis of ASHRAE technical standards, and an in-depth examination of case studies pertaining to the author’s SlimEdge 45° methodology. The results obtained indicate the fundamental necessity of implementing local exhaust ventilation systems and high-temperature sterilization as baseline instruments for counteracting fine particulate dust and persistent fungal pathogens, including Trichophyton rubrum. It is demonstrated that targeted optimization of the geometric parameters of the nail plate yields a pronounced reduction in bacterial retention within the hyponychial zone by decreasing microcavities and areas of stagnant bio-material accumulation. The concluding propositions confirm the fulfillment of the stated objectives and underscore the high applied significance of the proposed recommendations for elevating sectoral standards in the beauty industry, offering substantive interest to engineers specializing in building life-support systems design, epidemiologists, beauty-center owners, and practitioners oriented toward achieving competitive outcomes in international professional championships.

infection control, onychomycosis, ASHRAE 241, aerosol contamination, SlimEdge 45°, sterilization, biofilms, occupational health and safety, Nailympia, engineering design

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