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Research has been conducted with the use of both cultivated microbic species and wild ones, directly selected from a human or an environmental sphere, the latest being particularly significant in this kind of research, thanks to their particular features. Our experimentally evaluations in this area have revealed how substances, which are commonly used as preservatives in the cosmetic sector, can produce an effect of non reversible cellular damage in certain microorganisms present in cosmetics, so producing the so called injured cells. The existence of injured cells has been widely documented in substrates acting as antimicrobial factors. Either present naturally or added on purpose. We find a typical example of this phenomenon in the case of drinking waters previously submitted to chlorination treatments. In this specific case, the unsuccessful search for viable but nonculturable cells, especially when they are indicators of faecal contamination, leads to an erroneous diagnosis of the characteristics of the microbiological analysate. In this work we propose and discuss the possible presence of injured cells in cosmetics, in order to define the importance of their presence in a further evaluation of the real microbiological quality of cosmetics.

Additional information

Authors: PASTONI F, Consiglio dell'Ordine Nazionale dei Biologi, Roma (IT);MARENGO G, JRC Ispra (IT);ZAMPOLLO F, JRC Ispra (IT);MARENGO S, JRC Ispra (IT);TARANTINO E, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 5th International Symposium on Microbiology of Food and Cosmetics in Europe, Milano (IT), October 24-25, 1995
Availability: Available from (1) as Paper EN 39458 ORA
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