Bacterial and Odor Profile of Clothes
Clothing textiles protect our human body against external factors. These textiles are not sterile and can harbor high bacterial counts as sweat and bacteria are transmitted from the skin. We investigated the microbial growth and odor development in cotton and synthetic clothing fabrics. T-shirts were collected from 26 healthy individuals after an intensive bicycle spinning session and incubated for 28h before analysis. A trained odor panel determined significant differences between polyester versus cotton fabrics for the hedonic value, the intensity and five qualitative odor characteristics. The polyester T-shirts smelled significantly less pleasant and more intense, as compared to the cotton T-shirts. A dissimilar bacterial growth was found in cotton versus synthetic clothing textiles. Micrococci were isolated in almost all synthetic shirts and were detected almost solely on synthetic shirts by means of DGGE fingerprinting. A selective enrichment of micrococci in an in vitro growth experiment confirmed the presence of these species on polyester. Staphylococci were abundant on both cotton and synthetic fabrics. Corynebacteria were not enriched on any textile type. This research found that the composition of clothing fibers promotes differential growth of textile microbes and, as such, determines possible malodor generation.
Test Method Matchmaking
Is there one correct microbiological test method for every product?
Antimicrobial test methods are generally used as screening tools to assist us in predicting the end-use performance characteristics of our products. Choosing the correct test method for both the active antimicrobial agent used and for the proposed end-use is critical in allowing us to predict functionality in the real-world. In most cases, for non-porous, hard surfaces, test methods that allow for direct inoculation of a test surface would be required. The most suitable Industrial Standard test method for ceramic tiles, for example, would be the ISO 22196 (or JIS Z2801). In this test method, a standard amount of bacteria are applied to a test surface. After a specific time, usually 18-24 hours, the surviving bacteria are retrieved from the surface and counted.
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