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Table 3 Demographic characteristics of childcare facility EHEC outbreak-related cases, 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

  Total 2010–2011 2012–2013
  Symptomatic (n) Asymptomatic (n) Total (n) Symptomatic (%) Symptomatic (n) Asymptomatic (n) Total (n) Symptomatic (%) Symptomatic (n) Asymptomatic (n) Total (n) Symptomatic (%)
Male 197 287 484 (41 %) 54 46 100 (54 %) 143 241 384 (37 %)
Female 196 355 551 (36 %) 50 68 118 (42 %) 146 287 433 (34 %)
Age in years
<7, childcare facility 329 432 761 (43 %) 75 66 141 (53 %) 254 366 620 (41 %)
<7, family 10 6 16 (63 %) 3 2 5 (60 %) 7 4 11 (64 %)
7–19, family 16 37 53 (30 %) 6 4 10 (60 %) 10 33 43 (23 %)
20–49, family 23 97 120 (19 %) 15 22 37 (41 %) 8 75 83 (10 %)
50, family 2 26 28 (7 %) 0 8 8 (0 %) 2 18 20 (10 %)
Others a 13 44 57 (23 %) 5 12 17 (29 %) 8 32 40 (20 %)
  1. a Others include those who were not or not known to be family members of the child attending the childcare facility