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