The great majority belong to the colon bacillus group, and are negative to Gram's method of staining.
The gonococcus, colon bacillus, or some other pyogenic bacterium gets a nidus after pressure and lowered power of resistance.
Peptonizing and spore-bearing species have also been reported as well as gas-producing forms allied to the colon bacillus.
The staphylococcus, bacillus of Friedlnder, colon bacillus, and Bacillus pyocyaneus may be met in chronic middle-ear disease.
colon bacillus n.
A rod-shaped bacterium, especially Escherichia coli, a generally nonpathogenic commensal found in all vertebrate intestinal tracts, but which can be virulent, causing diarrhea and other dysenteric symptoms. Its presence in water is an indicator of fecal contamination.