NCIt definition : A species of anaerobic, Gram positive, rod shaped bacteria assigned to the phylum
Firmicutes. This species is non-motile, sporeforming, urease positive, catalase and
indole negative and reduces sulfites and nitrates. C. celatum is part of the normal
flora of the gastrointestinal tract and has been isolated from clinically normal human
feces.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Clostridium celatum.;