Abstract
A considerable decline in viability of spray dried cells of Geotrichum klebahnii was observed and was attributed to an undefined alteration of the used strain. As common techniques were not able to distinguish the altered from the still viable strains, we used the fatty acid methyl ester (FAME) analysis. On the basis of FAME data we were able to discriminate the three strains under investigation. Especially the ratios of cis/trans fatty acid ratios and of saturated/unsaturated fatty acid were significantly reduced in the less viable strain, pointing to an increased stress level in this strain. These findings clearly show the applicability of the FAME analysis to detect strain alterations and that this method is therefore a suitable, fast and feasible tool for quality assurance.
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Schwarzenauer, T., Lins, P., Reitschuler, C. et al. The use of FAME analyses to discriminate between different strains of Geotrichum klebahnii with different viabilities. World J Microbiol Biotechnol 28, 755–759 (2012). https://doi.org/10.1007/s11274-011-0847-7
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DOI: https://doi.org/10.1007/s11274-011-0847-7