Table 5.
Antibiotic resistance profile and MAR index of enteropathogenic bacteria isolated (N = 93), at La Paz River basin water, soil and vegetable sampling points
| Enteropathogenic bacteria | Strain codea | Resistance profile | MAR indexb |
|---|---|---|---|
| ETECc | W2-1(LT/STh) | ST | 0.17 |
| W2-2 (LT/STh) | C, TC | ||
| W2-3 (LT/STh) | AM, S, ST | ||
| W2-4 (LT/STh) | AM, NA | ||
| W2-6 (LT/STh) | NA | ||
| W2-7 (STh) | CI, NA | ||
| W2-14 (LT/STh) | AM, AB, S | ||
| W2-22 (STh) | NA | ||
| W2-51 (LT/STh) | AM, AB, C, TC | ||
| W2-61 (LT/STh) | – | ||
| EAEC | W2-72 | ST | 0.18 |
| W2-75 | AM, NA, S, ST, TC | ||
| W2-76 | – | ||
| EPEC | W2-38 | AM, AB, C, S, ST, TC | 0.33 |
| W2-60 | NA, ST, TC | ||
| W2-74 | AM, ST | ||
| Salmonella | W2-9 | NA | 0.22 |
| W2-16 | NA | ||
| W2-26 | AM, C, CN, S, ST, TC | ||
| W2-35 | AM, C, CN, S, ST, TC | ||
| W2-41 | NA | ||
| W2-52 | NA | ||
| W2-57 | – | ||
| W2-90 | AM, C, TC | ||
| ETEC | W3-45 (LT/STh) | AM, AB, NA, S, ST | 0.17 |
| W3-46 (LT/STh) | NA | ||
| W3-48 (LT/STh) | AM, C, TC | ||
| W3-73 (LT) | AM | ||
| W3-77 (LT/STh) | – | ||
| W3-78 (LT/STh) | NA | ||
| W3-79 (LT) | AM, ST | ||
| EAEC | W3-8 | AM, S, TC | 0.24 |
| W3-20 | AM, CN, S, ST, TC | ||
| W3-34 | NA | ||
| W3-47 | AM, ST | ||
| W3-80 | AM, NA | ||
| EPEC | W3-23 | AM, ST | 0.18 |
| Salmonella | W3-10 | NA | 0.23 |
| W3-17 | AM, C, CT, NA, S, ST, TC | ||
| W3-27 | AM, AB, C, CN, FX, NA, S, ST, TC | ||
| W3-42 | NA | ||
| W3-53 | – | ||
| MV58 | – | ||
| W3-65 | TC | ||
| W3-91 | TC | ||
| ETEC | W4-15 (LT) | AM, C, ST, TC | 0.21 |
| W4-33 (LT) | – | ||
| W4-49 (LT) | – | ||
| W4-50 (LT) | AM, CI, CN, NA, S, ST, TC | ||
| W4-62 (LT) | AM, C, ST | ||
| W4-89 (LT/STh) | NA | ||
| W4-88 (LT/STh) | NA | ||
| EAEC | W4-21 | – | 0.23 |
| W4-25 | – | ||
| W4-70 | AM, AB, C, S, ST | ||
| W4-71 | AM, AB, C, S, ST | ||
| Salmonella | W4-12 | – | 0.20 |
| W4-18 | AM, C, S, ST, TC | ||
| W4-30 | AM, AB, C, CN, FX, S, ST, TC | ||
| W4-37 | AM, CI, CN, FX, S, ST, TC | ||
| W4-44 | – | ||
| W4-54 | – | ||
| W4-59 | – | ||
| W4-68 | – | ||
| W4-93 | – | ||
| EIEC/Shigella | W4-69 | AM | 0.09 |
| ETEC | S-5 (LT/STh) | AM, C, ST, TC | 0.16 |
| S-13 (LT/STh) | NA | ||
| S-24 (LT) | – | ||
| S-31 (LT/STh) | NA | ||
| S-84 (LT/STh) | NA | ||
| S-85 (LT/STh) | AM, C, TC | ||
| S-86 (LT) | NA | ||
| S-87 (LT) | AM, ST, TC | ||
| EPEC | S-19 | AM, ST | 0.18 |
| Salmonella | S-29 | AM, AB, C, CI, CN, NA, S, ST, TC | 0.41 |
| S-43 | – | ||
| EIEC/Shigella | S-55 | AM, FX | 0.14 |
| S-56 | AM, FX | ||
| S-66 | – | ||
| S-67 | AM, FX | ||
| ETEC | C-32 (LT/STh) | AM, C, TC | 0.23 |
| L-39 (STp) | AM, AB, C, TC | ||
| L-40 (LT/STh) | AM, C, TC | ||
| L-63 (STp) | AM, NA | ||
| L-64 (LT/STh) | AM, NA | ||
| L-81 (LT/STh) | AM, AB, C, TC | ||
| L-82 (STh) | NA | ||
| L-83 (LT/STh) | NA | ||
| Salmonella | L-11 | – | 0.36 |
| L-28 | AM, C, CI, CN, NA, S, ST, TC | ||
| C-36 | AM, C, CI, CN, NA, S, ST, TC | ||
| L-92 | – |
–, antibiotic sensitive strain
aStrain code was assigned based on the sample type and sampling site, followed by the numerical order of bacterial isolation: water (W), lettuce (L), chard (C) and soil (S) and sites (2, 3 and 4). No pathogens were detected at site 1
bMAR index calculated for each enteropathogenic category
cETEC strains were characterized by presence of one of the toxin genes (LT/STh/STp)