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Table 2 Distribution of 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 (type and genes) n = 130

Number (%)

% of all patients (n = 327)

No. of strains (%)

p value

Children (n = 141)

Adults (n = 186)

EAEC

76

23.2

32 (22.6)

44 (23.6)

0,8952

aatA

15 (19.7)

4.6

12 (8.5)

3 (1.6)

0.0027

 AA phenotype

60 (78.9)

18.3

26 (18.4)

34 (18.3)

1.0000

 CLA phenotype

16 (21.1)

4.9

4 (2.8)

12 (6.5)

0.1952

DAEC

42

12.8

18 (12.8)

24 (12.9)

0.3215

afa/dr

25 (59.5)

7.6

14 (9.9)

11 (5.9)

0.2091

 DA phenotype

17 (40.5)

5.2

4 (2.8)

13 (7.0)

0.7628

EPEC

10

3.1

8 (5.7)

2 (1.1)

NDa

eae

10 (100)

3.1

8 (5.7)

2 (1.1)

ND

eae + bfpA

0

0

0

0

ND

ETEC

2

0.6

0

2 (1.1)

ND

elt

1 (50.0)

0

0

1 (0.5)

ND

est

1 (50.0)

0

0

1 (0.5)

ND

EIEC

0

0

0

0

ND

ipaH

0

0

0

0

 

EHEC

0

0

0

0

ND

stx1or stx2

0

0

0

0

 

Mixed infection

6

1.8

2 (1.4)

4 (2.2)

0.7024

 EAEC + DAEC

3

0.9

1 (0.7)

2 (1.1)

ND

 EAEC + ETEC

1

0.3

0

1 (0.5)

ND

 EAEC + aEPEC

1

0.3

0

1 (0.5)

ND

 DAEC + aEPEC

1

0.3

1 (0.7)

0

ND

  1. aNot determined; p value in bold: significant (Fisher’s exact tests)