Table 2 Structure and antibiotic resistance of the E. coli population in the stream during different hydrological conditions (χ2 test P < 0.001 ***α = 0.01).
| Â | E. coli phylo-group distribution | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | A | B1 | B2 | D | ||||||||||
Hydrologic conditions | % (n) | Numbers of antibiotic-resistanta | Antibiotic resistanceb(n) | % (n) | hly c | Numbers of antibiotic-resistanta | Antibiotic resistanceb(n) | % (n) | O81d | Numbers of antibiotic-resistanta | Antibiotic resistanceb(n) | % (n) | Numbers of antibiotic-resistanta | Antibiotic resistanceb (n) |
Wet period | 47% (21)*** | 0 | nd | 39% (17)*** | 0 | 0 | nd | 7% (3) | 0 | 0 | nd | 7% (3) | 0 | nd |
Dry period | 7% (3)*** | 0 | nd | 87% (39)*** | 0 | 0 | nd | 2% (1) | 0 | 0 | nd | 4% (2) | 0 | nd |
Rain event during dry period | 32% (11) | 7 | CHL(3) TET(3) STR(1) | 44% (15) | 2 | 10 | CHL (5) TET(3) CHL/TET(2) | 0% (0) | nd | nd | nd | 23% (8) | 2 | CHL/TET(1) CHL(1) |