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Table 3 Distribution of related-virulence genes among diarrheagenic E. coli (DEC) isolated from children and adults attending health centers in Southeastern Brazil

From: High prevalence of diarrheagenic Escherichia coli carrying toxin-encoding genes isolated from children and adults in southeastern Brazil

DEC group Virulence gene Number (%) No. of strains (%) p value
Children (n = 141) Adults (n = 186)
EAEC   76    
aatA 15 (19.7) 12 (8.5) 3 (1.6) 0.0027
aap 21 (27.6) 15 (10.6) 6 (3.2) 0.0107
aggR 20 (26.3) 14 (9.9) 6 (3.2) 0.0181
aggA 1 (1.3) 1 (0.7) 0 NDa
aafA 0 0 0 ND
agg3A 7 (9.2) 4 (2.8) 3 (1.6) 0.4698
hdaA 5 (6.6) 4 (2.8) 1 (0.5) 0.1696
pet 42 (55.3) 17 (12.1) 25 (13.4) 0.7416
astA 17 (22.3) 8 (5.7) 9 (4.8) 0.8040
pic 31 (40.8) 14 (9.9) 17 (9.1) 0.8502
sat 11 (14.5) 5 (3.5) 6 (3.2) 1.0000
irp2 29 (38.1) 11 (7.8) 18 (9.7) 0.6951
iucA 27 (35.5) 13 (9.2) 14 (7.5) 0.6858
chuA 14 (18.4) 6 (4.3) 8 (4.3) 1.0000
DAEC   42    
afaB-C 25 (59.5) 14 (9.9) 11 (5.9) 0.2091
afaE 0 0 0 0
daaE 0 0 0 0
aida/aah 0 0 0 0
astA 6 (14.2) 4 (2.8) 2 (1.1) ND
pic 3 (7.1) 1 (0.7) 2 (1.1) ND
pet 23 (54.8) 6 (4.3) 17 (9.1) 0.1251
sat 11 (26.2) 3 (2.1) 8 (4.3) 0.3620
aEPEC   10    
astA 10 (100.0) 8 (5.7) 2 (1.1) ND
paa 4 (40.0) 4 (2.8) 0 ND
  1. aND: Not determined; p value in bold: significant (Fisher’s exact tests)