The efficacy of the preservative systems of two cosmetic products, tested
against standard micro-organisms (Staphylococcus aureus ATCC 4338 and Pseudomonas
aeruginosa ATCC 9027) and two isolates from cosmetics in this study
(S. epidermidis and P. putida), satisfied the Cosmetics, Toiletries, and Fragrance
Association and Official Italian Pharmacopeia criteria, while only one tested
cosmetic respected the Rapid Challenge Test criterion.