FIG. 4.

Results of separate experiments in which total anaerobes were quantified after 72 h of treatment with cephalosporin antibiotics. These experiments are not strictly comparable to the others described in this paper since an E. faecium inoculum was not given at 48 h. Standard deviation bars are not included since there was only one animal given saline in this experiment. The other treatment groups contained three animals each. None of the cephalosporin antibiotics exhibited a significant effect on the total anaerobic flora of the small bowel.