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The organism has been reclassified and the organism officially renamed as Clostroides difficile. (1). Whilst the common name and clinical abbreviation remains as C diff/C difficile, and the disease remains C diff-associated infection (CDAI), this reclassification happened in 2016 and it is surprising that the authors did not at least mention this.
Otherwise I very much enjoyed this pragmatic and helpful clinical review of this important condition.
1. Lawson, Paul A.; Citron, Diane M.; Tyrrell, Kerin L.; Finegold, Sydney M. (August 2016). "Reclassification of Clostridium difficile as Clostridioides difficile (Hall and O'Toole 1935) Prévot 1938". Anaerobe. 40: 95–99.