Presence of Functionally Active Cytolethal Distending Toxin Genes on a Conjugative Plasmid in a Clinical Isolate of Providencia rustigianii

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Providencia rustigianii is potentially enteropathogenic in humans. Recently, we identified aP. rustigianiistrain carrying a part of thecdtBgene homologous to that ofProvidencia alcalifacinesthat produces an exotoxin called cytolethal distending toxin (CDT), encoded by three subunit genes (cdtA,cdtB, andcdtC).