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. Author manuscript; available in PMC: 2015 Jun 1.
Published in final edited form as: Pediatr Infect Dis J. 2014 Jun;33(6):549–553. doi: 10.1097/INF.0000000000000204

Table 2.

Characteristics of MRSA culture pairs with identical and distinct MRSA strains

Pair Characteristics Total
N=91 (%)		 Distinct
N=10 (%)		 Identical
N=81 (%)		 p
Interval between infections, days, median [range] 310 [8–1573] 291 [91–623] 316 [8–1573] 0.61
Antibiotic effect
  Antibiotic effective against 1st culture in pair 48 (53) 6 (60) 42 (52) 0.74
  Antibiotic ineffective against 1st culture in pair or no antibiotic prescribed 43 (47) 4 (40) 39 (48)
Clinical presentation
  2 acute cultures 28 (31) 3 (30) 25 (31) 0.96
  2 surveillance cultures 33 (36) 4 (40) 29 (36)
  1 acute and 1 surveillance culture 30 (33) 3 (30) 27 (33)
Negative MRSA culture between pair
  Yes 25 (27) 5 (50) 20 (25) 0.13
  No 66 (73) 5 (50) 61 (75)
SCCmec type
  Different 10 (11) 5 (50) 5 (6) 0.001
  Same 81 (89) 5 (50) 76 (94)