TABLE 3.

Comparison of distribution of P. acnes recA phylotypes from all endodontic lesions and from the 13 paired endodontic samples with the distribution of P. acnes phylotypes identified from the perioral samples

Isolate	No. of isolates				P value (χ2 test)
	Type IA	Type IB	Type II	Type III
P. acnes from paired perioral lesions	36	26	3	0
P. acnes from paired endodontic lesions	7	5	25	2	4 × 10−8
All endodontic P. acnes isolatesa	9	12	35	4	<10−10

^an = 20.