NCIt definition : A species of anaerobic, Gram positive, rod shaped bacteria assigned to the phylum
Firmicutes. This species is indole negative, produces a weak exotoxin and is positive
for nitrite reaction. C. fallax is pathogenic when exposed to open wounds on the body
and is the causative agent of black leg disease in sheep as well as gas oedema.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Clostridium fallax.;