FIG. 2.

Cluster analysis of (GTG)₅ PCR fingerprints of the tetracycline-resistant L. paracasei isolates. Clustering (expressed as percent similarity) was determined by the unweighted-pair group method with arithmetic averages and the Pearson product moment correlation coefficient. The vertical dotted line indicates 90% correlation (minimum level of reproducibility). Roman numbers indicate REP groups. Identification numbers for each independent isolate (ID), tetracycline MICs, and sources of isolation are indicated on the right. M, water buffalo raw milk; NWSC, natural whey starter cultures.