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Isolation And Characterization Of Toxin A-Negative, Toxin B-Positive Clostridium Difficile In Dublin, Ireland, Denise Drudy, N. Harnedy, S. Fanning, R. O’Mahony, L. Kyne
Isolation And Characterization Of Toxin A-Negative, Toxin B-Positive Clostridium Difficile In Dublin, Ireland, Denise Drudy, N. Harnedy, S. Fanning, R. O’Mahony, L. Kyne
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Clostridium difficile is a major cause of infectious diarrhoea in hospitalised patients. Most pathogenic C. difficile strains produce two toxins, A and B; however, clinically relevant toxin A-negative, toxin Bpositive (A– B+ ) strains of C. difficile that cause diarrhoea and colitis in humans have been isolated worldwide. The aims of this study were to isolate and characterise A– B+ strains from two university hospitals in Dublin, Ireland. Samples positive for C. difficile were identified daily by review of ELISA results and were cultured on selective media. Following culture, toxin-specific immunoassays, IMR-90 cytotoxicity assays and PCR were used to analyse …