TABLE III.

C. acnes Mouse Skin Loads by Treatment

Treatment	C. acnes Counts*	P Value†
Untreated	6.65 ± 0.145	—
PCA, 78 mM	5.51 ± 0.249	0.0295
PCA, 39 mM	7.5 ± 0.725	0.4513
PCA, 19.5 mM	5.86 ± 0.429	0.2235

^*The values are given as the mean log CFUs (colony-forming units) per gram of skin tissue and the standard deviation.

^†Determined using a 2-tailed t test to compare C. acnes counts between untreated mice and mice treated with each dosage of PCA.