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E. Coli : Factors For Source Of Water And Place

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4.4 detection of diarrheagenic E. coli virulence factors isolate according to source of water and place. The diarrheagenic E. coli virulence factors distribution according to the source of water and place is showed in table 4-1 and 4-2, the high frequency of virulence factors is IPaH 15 (32.6%) in tap water, a high frequency of IPaH 19 (30.4%) in houses.

Table 4-1: The presence of virulence factors from E. coli isolates according to source of water.
Source AggR Stx IPaH eae Total + + + +
Tap water 11
(23.9%) 5
(10.8%) 15
(23.6%) 0
(0.0%) 31
(67.3%)
Cooler 3
(6.5%) 0
(0.0%) 4
(8.7%) 0
(0.0%) 7
(15.2%)
Tank 0
(0.0%) 0
(0.0%) 0
(0.0%) 0
(0.0%) 0
(0.0%)
Total 14
(30.4%) 5
(10.09%) 19
(41.3%) 46
(100.0%) 38
(82.6%)
Key: + positive
…show more content…
Table 4-4: The activity of antibiotics on E. coli isolated from drinking water.
Antibiotics Sensitive Resistance Intermediate Total
Chloramphenicol 31
(67.4%) 8
(17.4%) 7
(15.2%) 46
(100%)
Ceftriaxone 29
(63.0%) 4
(8.7%) 13
(28.3%) 46
(100%)
Ciprofloxacin 24
(52.2%) 11
(23.9%) 11
(23.9%) 46
(100%)
Gentamicin 19
(41.3%) 11
(23.9%) 16
(34.8%) 46
(100%)
Tetracycline 1
(2.2%) 45
(97.8%) 0
(0.0%) 46
(100%)

4.7 The correlation between the antimicrobial susceptibility and presence of virulence factors. There was significant correlation (p-value> 0.05(; between the presence of the Stx gene and sensitivity to Ciprofloxacin, between the presences of IPaH gene and sensitivity to Ceftriaxone and between the presences of Stx gene and the sensitive to Tetracycline (p-value> 0.05( as shown in table 4-5.
Table 4-5: The correlation between the antimicrobial susceptibility and the presence of virulence factors of E. coli.
Spearman 's rho AggR Stx IPaH eae
Ciprofloxacin 0.105 0.317* -0.140 0.105 0.486 0.032 0.352 0.486
Chloramphenicol 0.032 0.238 -0.253 . 0.832 0.111 0.090 .
Ceftriaxone 0.115 0.262 0.377** . 0.447 0.078 0.010 .
Gentamicin 0.217 0.219 -0.171 . 0.148 0.143 0.257 .
Tetracycline 0.225 0.427** -0.125 . 0.132 0.003 0.408 . *Correlation is significant at P. value ≤ 0.05 **Correlation is significant at P. value ≤ 0.01

4-7
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