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Adherence of flagellated and nonflagellated C. difficile strains to axenic mouse cecum. The adherence of flagellated and nonflagellated strains belonging to the same serogroup is expressed as log10 number of bacteria per gram of cecum from five mice. Strains belonging to serogroup B are toxin A negative, whereas strains belonging to serogroup F are toxin A and B negative.
