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Table 2 MRSA case classification and molecular epidemiology

From: The molecular epidemiology of incident methicillin-resistant Staphylococcus aureus cases among hospitalized patients in Alberta, Canada: a retrospective cohort study

Matched MRSA April 2011 – March 2013 n = 2211 Hospital Acquired (HA) n = 770 (34.8 %) Healthcare Associated (HCA) n = 553 (25.0 %) Community Acquired (CA) n = 888 (40.2 %)
PFGE n (% of HA) spa type n (% of PFGE) PFGE n (% of HCA) spa type n (% of PFGE) PFGE n (% of CA) spa type n (% of PFGE)
Traditional Nosocomial n = 1098 t002 (CMRSA 2) 501 (65.1) 316 (63.1) 327 (59.1) 201 (61.5) 270 (30.4) 181 (67.0)
t003 (CMRSA 2) 72 (14.4) 65 (19.9) 28 (10.4)
t242 (CMRSA 2) 37 (7.4) 24 (7.3) 17 (6.3)
t014 (CMRSA 2) 9 (1.8) 9 (2.8) 7 (2.6)
t045 (CMRSA 2) 8 (1.6) 8 (2.5) 6 (2.2)
Other spa types (CMRSA 2) 59 (11.8) n = 25 spa types 20 (6.1) n = 14 spa types 31 (11.5) n = 22 spa types
Traditional Community n = 943 t008 (CMRSA 10) 160 (20.8) 128 (80.0) 152 (27.5) 131 (86.2) 445 (50.1) 388 (87.2)
t024 (CMRSA 10) 7 (4.4) 4 (2.6) 9 (2.0)
t648 (CMRSA 10) 4 (2.5) 4 (2.6) 6 (1.3)
Other spa types (CMRSA 10) 21 (13.1) n = 8 spa types 13 (8.9) n = 13 spa types 42 (9.4) n = 24 spa types
t128 (CMRSA7) 47 (6.1) 25 (53.2) 30 (5.4) 19 (63.3) 109 (12.3) 63 (57.8)
t1787 (CMRSA7) 3 (6.4) 6 (20.0) 17 (15.6)
t1508 (CMRSA7) 10 (21.3) 4 (13.3) 17 (15.6)
Other spa types (CMRSA7) 9 (19.1) n = 8 spa types 1 (3.3) (spa type t175) 12 (11.0) n = 7 spa types
Others n = 170 t065 (CMRSA1) 2 (0.3) 2 (100.0) 9 (1.6) 4 (44.4) 3 (0.3) 2 (66.7)
Other CMRSA1 spa types 0 (0.0) 5 (55.6) n = 3 spa types 1 (33.3) (spa type t026)
t037 (CMRSA3/6) 11 (1.4) 11 (100.0) 2 (0.4) 2 (100.0) 6 (0.7) 6 (100.0)
CMRSA4 spa types 2 (0.3) 2 (100.0) n = 2 spa types 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0)
CMRSA5 spa types 1 (0.1) 1 (100.0) (spa type t064) 1 (0.2) 1 (100.0) (spa type t064) 1 (0.1) 1 (100.0) (spa type t1476)
t022 (CMRSA8) 31 (4.0) 10 (32.2) 19 (3.4) 9 (47.4) 12 (1.4) 1 (8.3)
t6443 (CMRSA8) 14 (45.2) 3 (15.8) 2 (16.6)
Other CMRSA8 spa types 7 (22.6) n = 6 spa types 7 (36.8) n = 4 spa types 9 (75.0) n = 7 spa types
t019 (PFGE Not Assigned) 15 (1.9) 1 (6.7) 13 (2.4) 0 (0.0) 42 (4.7) 17 (40.5)
Other PFGE Not Assigned spa types 14 (93.3) n = 11 spa types 13 (100.0) n = 11 spa types 25 (59.5) n = 16 spa types
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Antimicrobial Resistance & Infection Control

ISSN: 2047-2994

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