Table 1.

In vitro susceptibilities of S. dysenteriaeand transconjugant to β-lactam antibiotics

Antibiotic(s)MIC (μg/ml) for:
E. coli HB-101S. dysenteriaeC152aS. dysenteriaePB-10Transconjugant
Ampicillin88>1000>1,000
Ampicillin + CAc 884052
Ticarcillin8NDb >1000>1,000
Ticarcillin + CA8ND100100
Cefotaxime0.250.251616
Cefotaxime + CA0.250.2544
Ceftazidime0.1611616
Ceftazidime + CA0.1611616
CefuroximeNDND250ND
PiperacillinND8500ND
CarbenicillinNDND1,000ND
CefoxitinND44ND
ImipenemND22ND
  • a S. dysenteriae C152 was a susceptible clinical isolate obtained from NICED, Calcutta, India.

  • b ND, not determined.

  • c CA, clavulanate.