TABLE 2.
Prevalence of ST1193 within collections of clinical E. coli isolates from multiple centers in 2011 and 2013
| Population | Location | Yr | Total no. of isolates | ST1193 [no. (% of total)] | FQ-R isolates |
FQ-S isolates |
P value, ST1193 in FQ-R vs. FQ-S | ||
|---|---|---|---|---|---|---|---|---|---|
| No. (% of total) | ST1193, no. (% of FQ-R) | No. (% of total) | ST1193, no. (% of FQ-S) | ||||||
| Veterans | 24 VAMCs | 2011 | 472 | 4 (0.5a ) | 236 (29a ) | 4 (1.7) | 236 (71a ) | 0 (0) | 0.12 |
| General | Olmsted County, MNb | 2011 | 299 | 2 (0.7) | 88 (29) | 2 (2.3) | 211 (71) | 0 (0) | 0.09 |
| Minneapolis, MNc | 2013 | 233 | 4 (1.7) | 65 (28) | 4 (6) | 168 (72) | 0 (0) | 0.006 | |
| Any of the above | All of the above | 2011–2013 | 1,004 | NAd | 389 (NA) | 10 (2.6) | 615 (NA) | 0 (0) | <0.001 |
a
Because the analyzed VAMC isolates were selected artificially to be 50% FQ-R and 50% FQ-S, the true total prevalence of ST1193 among VAMC isolates was estimated by adjusting the observed prevalence within the FQ-R and FQ-S subsets by the prevalence of those subsets at the contributing VAMCs, which is shown here as “% of total” for FQ-R and FQ-S isolates.
b
Olmsted County Medical Center and Mayo Clinic, Rochester, MN.
c
University of Minnesota Medical Center (East Bank facility, West Bank facility, and Children’s Hospital).
d
NA, percentage was not applicable (due to deliberate selection of FQ-R and FQ-S isolates for the VAMC collection).