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Safety, efficacy and utility of methods of transferring adhesive and cohesive Escherichia coli cells to microplates to avoid aerosols.


ABSTRACT: The virtual colony count (VCC) microbiological assay has been utilized for over a decade to measure the antimicrobial activity of peptides such as defensins and LL-37 against biosafety level (BSL)-1 and BSL-2 bacteria including Escherichia coli, Staphylococcus aureus, Bacillus cereus, and Enterobacter aerogenes.  In addition, a modified pipetting technique was presented in a 2011 study of defensin activity against the BSL-3 pathogen Bacillus anthracis.  Both studies were published in the journal Antimicrobial Agents and Chemotherapy.  Here I report that the method can also detect cross-contamination caused by aerosols utilizing the VCC method of data analysis by quantitative growth kinetics (QGK).  The QGK threshold time, or T t, equivalent to the cycle time C t reported in 1996 by Heid et al., precisely identifies when wells were inoculated.

SUBMITTER: Ericksen B 

PROVIDER: S-EPMC4309163 | biostudies-literature |

REPOSITORIES: biostudies-literature

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