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Table 4 Number of childcare facility EHEC outbreak-related cases by serogroups and stx types, 2010–2013, Japan. All outbreaks listed below in the table refer to childcare facility-related outbreaks

From: Enterohemorrhagic Escherichia coli outbreaks related to childcare facilities in Japan, 2010–2013

Serogroup stx type Total 2010–2011 2012–2013 Ratio of 2012–2013 values to 2010–2011 values
Case Outbreak Case Outbreak Case Outbreak Case Outbreak
O157 stx1 11 1 11 1 0 0 0 0
  stx2 or stx1/2 158 21 58 9 100 12 1.7 1.3
  Total 169 22 69 10 100 12 1.4 1.4
O26 stx1 478 26 86 7 392 19 4.6 2.7
  stx2 or stx1/2 70 3 45 2 25 1 0.6 0.5
  Total 548 29 131 9 417 20 3.2 2.2
O111 stx1 44 3 0 0 44 3 - -
  stx2 or stx1/2 129 3 0 0 129 3 - -
  Total 173 6 0 0 173 6 - -
O103, O121 or O145 a stx1 48 5 11 1 37 4 3.4 4
  stx2 or stx1/2 34 4 7 1 27 3 3.9 3
  Total 82 9 18 2 64 7 3.6 3.5
Total stx1 581 35 108 9 473 26 4.4 2.9
  stx2 or stx1/2 391 31 110 12 281 10 2.6 0.8
  Total 972 66 218 21 754 45 3.5 2.1
  1. a excludes cases related to two O26/O103 co-infection outbreaks