Table 2. PCR-detection of island-like genomic regions in P. acnes isolates.

	1 (a)	1 (b)	2 (a)	2 (b)	3 (a)	3 (b)	4 (a)	4 (b)
strain									phylotype
266			+	+					I-1a/ST18
SK137									I-1a/new ST
SK187	+	+	+	+					I-1a/new ST
KPA171202	+	+	+	+	+	+	+	+	I-2/ST34
J139			+	+	+	+			II/new ST
1.4.L1			+	+					I-1a/ST18
12.1.L1			+	+					I-1a/ST18
32.1.L1			+	+					I-1a/ST18
4.1.A1			+	+					I-1a/ST20
12.1.R1			+	+					I-1a/ST20
19.1.R1	+	+	+	+			+	+	I-1a/ST21
3.5.R1			+	+	+	+			I-1a/ST27
2.3.A1	+	+	+	+	+	+	+	+	I-2/ST35
21.1.L1	+	+	+	+	+	+	+	+	I-2/ST36
3.3.R1	+	+	+	+	+	+	+	+	I-2/ST36
10.1.R1			+	+					II/ST52
34.1.A1			+	+					II/ST54
CCUG35547		+		+			+	+	III/ST44
CCUG35900		+		+			+	+	III/ST43
P6	+	+	+	+	+	+	+	+	I-2/ST33

Two PCRs (a and b) per island were performed to check for the presence of the four main genomic islands in the listed human isolates (islands in SK137, SK187 and J139 were predicted from their genomes).