FIG. 1.
S. marcescens RAPD types in two hospitals over a 5-year period. Types with three or more isolates are indicated by capital letters, types with two isolates are marked with a plus sign, and unique isolates are marked with a solid circle. For the sake of clarity, the two-letter RAPD types AR, AT, AV, BF, and BG are marked R, T, V, F, and G, respectively. ESBL-producing isolates are indicated with italics and boldface. Abbreviations: (1) and (2), hospitals 1 and 2, respectively; j, January; m, March; m, May; j, July; s, September; n, November.