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Table 1 Distribution of symptomatic cases among children, stratified by daycare center class

From: EHEC O111:H8 strain and norovirus GII.4 Sydney [P16] causing an outbreak in a daycare center, Brazil, 2019

Classa Total no. of children No. (%) of affected children Symptomatic cases
Severe casesb EHEC-positived Norovirus-positive
Baby 12 5 (41.7%) 2 0 3
1 16 0 (0) 0 0 0
2 20 5 (25%) 3 2 1
3A 19 1 (5.3%) 1 0 1
3B 19 1 (5.3%) 0 0 0
4 18 0 (0) 0 0 0
5 19 2c (10.5%) 0 0 0
Total 123 14 6 2 5
  1. aDistributed according to age. bChildren diagnosed with hemolytic uremic syndrome, hemorrhagic colitis, or diarrhea. cNorovirus was not investigated in one case. dEnterohemorrhagic Escherichia coli (EHEC) was isolated from a child with hemolytic uremic syndrome and a child with diarrhea. Staff members from classes 2 and 3A were also affected