TABLE 1.

Bacterial strains used in this study

StrainRelevant characteristicsMean biofilm cell densitya (CFU/peg)nSource or reference
Escherichia coli MBEC03Isolated from a slaughterhouse5.7 ± 0.460This study
Pseudomonas aeruginosa ATCC 15442Standard strain for biocide susceptibility testing (AOAC guidelines)6.8 ± 0.6297ATCC
Pseudomonas aeruginosa ATCC 27853Standard strain for antibiotic susceptibility testing (CLSI guidelines)6.7 ± 0.286
Pseudomonas fluorescens ATCC 13552Environmental organism implicated in food spoilage5.7 ± 0.51238
Salmonella enterica serovar Cholerasuis ATCC 10708Standard strain for biocide susceptibility testing (AOAC guidelines)4.7 ± 0.464ATCC
Staphylococcus aureus ATCC 6538Standard strain for biocide susceptibility testing (AOAC guidelines)5.6 ± 0.460ATCC
  • a Starting cell density measurements were based on the means and standard deviations of the pooled, log-transformed data for the indicated numbers of replicates (n).