Figure 3  .

Effect of Clostridium difficile toxin A (1 µg/ml physiological saline) on myeoloperoxidase activity (MPO) in the lumen of acutely denervated intestinal segments of animals pretreated with hexamethonium, a nicotinic receptor blocker. MPO activity at various times after exposing one segment to the toxin is shown. A control segment was only exposed to physiological saline. MPO activity response to the toxin was markedly attenuated by the drug (compare figs 1 and 3). Values are mean (SEM); n=5.