Table 4. Proportional resistance of selected gram-negative organisms by ward,a San Francisco County, 1996 to 1999.
| Escherichia coli- cefazolin | E. coli-ciprofloxacin | Enterococcus cloacae-ceftazidime | Pseudomonas aeruginosa -ciprofloxacin | P. aeruginosa -ceftazidime | P. aeruginosa -imipenem | Serratia marcescens -ceftazidime | |
|---|---|---|---|---|---|---|---|
| Skilled nursing facility | 9.1% (88) | 2.2% (92) | 50% (6) | 8.3% (12) | 25% (12) | 20.0% (10) | 40.0% (5) |
| Med/surg ICU | 8.4% (166) | 1.9% (160) | 53.4% (43) | 21.5% (65) | 15.9% (63) | 11.9% (59) | 12.1 (33) |
| Pediatric ICU | 18.5% (27) | 0% (28) | 18.2% (11) | 0% (13) | 7.7% (13) | 9.1% (11) | 0% (11) |
| Med/surg floors | 8.4% (586) | 4.3% (564) | 47.2% (53) | 19.1% (89) | 12.5% (88) | 12.2% (74) | 9.5% (21) |
| Pediatric floors | 25.0% (16) | 0% (16) | 27.3% (11) | 0% (10) | 0% (10) | 0% (8) | 0% (6) |
| Emergency department | 8.4% (536) | 2.6% (549) | 32.3% (31) | 23.5% (34) | 5.9% (34) | 6.7% (30) | 0% (17) |
| Outpatient | 8.6% (117) | 1.6% (123) | 4.8% (21) | 4% (25) | 4.0% (25) | 0% (22) | 0% (15) |
| Other/unknown | 11.1% (18) | 0% (18) | 0% (0) | 0% (1) | 0% (1) | 0% (1) | 0% (0) |
| Total | 8.8% (1,554) | 2.9% (1,550) | 38.1% (176) | 16.5% (249) | 11.4% (246) | 9.8% (215) | 7.3% (109) |
aTotal number of species isolates given in parentheses. Percentages for small numbers of total isolates should be cautiously.
ICU = intensive care unit