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Table 1 Characteristics of the isolates included in the study

From: Shigella sonnei biotype g carrying class 2 integrons in southern Italy: a retrospective typing study by pulsed field gel electrophoresis

Years Number of isolates Susceptibility pattern Class 2 integron
1971–1980 5 Susceptible Negative
  4 SmSuTc "
  3 SmSu "
  1 SmSuCmTc "
  1 SmSuCm "
  1 Su "
1981–1990 7 SmSuTcTp Positive
  1 ApSmSuTcTp Positive
1991–2000 5 SmSuTcTp Positive
  1 SmSuTcTp Negative
  2 SmSuTp Positive
  1. Ap = ampicillin; Cm = cloramphenicol; Sm = streptomycin; Su = sulfonamides; Tc = tetracycline; Tp = trimethoprim