Research Article
Characterization of Erythromycin and Tetracycline Resistance in Lactobacillus fermentum Strains
Table 2
Characterization of L. fermentum strains with antibiotic resistance for erythromycin and tetracycline.
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aDiameters of the zones of inhibition determined by the disc diffusion method (mean value ± standard deviation) (Figure S1A). bBased on standards mentioned in Materials and Methods, L. fermentum strains were characterized as either susceptible (S), moderately susceptible (MS), or resistant (R) to each antibiotic tested. cThe minimum inhibitory concentration (MIC) of antibiotics determined by the broth microdilution method as the lowest concentration of an antibiotic at which visible growth was inhibited. dBased on MIC values, L. fermentum strains were characterized as erythromycin resistant (ERM) or tetracycline resistant (TET). eAntibiotic resistance genes present in isolates of L. fermentum as detected using PCR: pplasmid-located gene; cchromosome-located gene (for details, see Figures S1B–S1D). |