Abstract

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Microorganisms associated with commonly used cosmetics and effects of microgravity on most frequently isolated microorganism were investigated. The microorganisms isolated from the cosmetics were Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Proteus mirabilis, Bacillus cereus, Proteus vulgaris, Bacillus subtilis, Trichoderma piluliferum and Neocosmospora vasinfecta. Fifty percent of the cosmetics were contaminated with Staphylococcus aureus, 31.82% contaminated with Pseudomonas aeruginosa, 22.73% contaminated with Escherichia coli, 13.64% contaminated with Proteus mirabilis, 13.64% contaminated with Bacillus cereus, 9.09% contaminated with Proteus vulgaris, 4.55% contaminated with Bacillus subtilis, 13.64% contaminated with Trichoderma piluliferum and 9.09% contaminated with Neocosmospor avasinfecta. The S. aureus which was the most frequently isolated bacteria was subjected to microgravity condition. The S. aureus grown under stimulated microgravity condition exhibited resistance to antibiotic more than under earth gravity. The resistance of the 5. aureus to antibiotics tends to increase with increased in revolution per minutes (rpm) at which the bacterium was subjected.

Keywords: Cosmetics, microorganisms, contamination, antibiotics, gravity.