Complex Clonal Diversity of Staphylococcus aureus Nasal Colonization among Community Personnel, Healthcare Workers, and Clinical Students in the Eastern Province, Saudi Arabia

Table 2

Molecular characteristics of S. aureus isolates.

Genotype (PFGE, MLST, spa) / no. of isolates (from C, S, W)	No. of MSSA	No. of MRSA (SCCmec) / isolate codes
USA900, CC15, t084 / 11 (8, 2, 1)	11	0
EU ST80, CC80, t131 / 6 (3, 2, 1)	4	2 (IV) / 58S, 68W
EMRSA-15, CC22, t1328 / 6 (1, 3, 2)	4 (3 mecA pos with SCCmec IV but PBP2a neg)	2 (IV) / 28W, 63W
USA200, CC30, t274 / 6 (2, 2, 2)	6	0
USA600, CC45, t065 / 5 (2, 3, 0)	5	0
USA800, CC5, t688 / 3 (0, 0, 3)	1 (mecA pos with SCCmec IV and PBP2a pos)	2 (IV) / 2W, 55W
USA100/800, CC5, t002 / 1 (0, 0, 1)	1 (mecA pos with SCCmec II but PBP2a neg)	0
USA300/500, CC8, t008 / 1 (0, 1, 0)	1	0
USA300/500, CC8, t024 / 1 (1, 0, 0)	1	0
USA500, CC97, t267 / 1 (1, 0, 0)	1	0
USA400, CC1, t128 / 1 (1, 0, 0)	0	1 (IVa) / 54C
PFGE A, ST1291, unknown spa / 2 (0, 0, 2)	2 (1 mecA pos with SCCmec V and PBP2a pos; 1 mecA pos with SCCmec V but PBP2a neg)	0
PFGE B, ST2196, t5078 / 1 (1, 0, 0)	1 (mecA pos with SCCmec I but PBP2a neg)	0
PFGE C, CC101, t5078 / 4 (2, 1, 1)	4 (3 mecA pos with SCCmec I but PBP2a neg)	0
PFGE D, ST291, t937 / 2 (0, 1, 1)	2 (1 mecA pos with SCCmec I and PBP2a pos; 1 mecA pos with SCCmec I but PBP2a neg)	0
PFGE E, SLV1292, t1149 / 2 (0, 0, 2)	2 (mecA pos with SCCmec V but PBP2a neg)	0
PFGE F, ST6, t304 / 2 (0, 1, 1)	0	2 (II) / 17S, 58W
PFGE G, ST789, unknown spa / 3 (1, 1, 1)	3 (mecA pos with SCCmec I but PBP2a neg)	0
PFGE H, CC22, t349 / 1 (1, 0, 0)	1	0
PFGE I, ST152, t355 / 1 (1, 0, 0)	1	0
PFGE J, ST2816, unknown spa / 1 (0, 0, 1)	1 (mecA pos with SCCmec IV but PBP2a neg)	0
PFGE K, CC88, t1339 / 1 (0, 1, 0)	0	1 (IV) / 68S
PFGE L, CC121, t159 / 1 (1, 0, 0)	1	0

PFGE designations either indicate a relationship to known strain types or, where unknown, an arbitrarily assigned alphabetical designation
MRSA as determined by resistance to cefoxitin
unknown spa type (SLV of t11096) 04-12-17-20-17-12-17-17-16
unknown spa type (SLV of t2505) 07-23-21-17-13-323-23-02-12-23
unknown spa type 07-23-12-12-17-13-22-16-16-23
C: community personnel; W: health care workers; S: clinical students
pos: positive; neg: negative.