Table 1.
Segment of a WHONET profile analysis of 1,056 isolates of Klebsiella pneumoniae isolated from one hospital over a 1-year perioda
| Patient | Ward | Specimen | Date (mo/day) | Antibiotype |
|---|---|---|---|---|
| A | 32 | Sputum | 4/26 | M FZ L |
| 32 | Sputum | 5/05 | M FZ L | |
| 32 | Sputum | 6/03 | M FZ L | |
| B | 78 | Tissue | 9/04 | M P LTH |
| C | 22 | Pleural fluid | 6/05 | M P LTH |
| EW | Sputum | 7/08 | M P LTH | |
| D | 22 | Pleural fluid | 4/22 | M P LTH |
| 22 | Other | 4/25 | M P LTH | |
| E | 87 | Tissue | 6/13 | M Z P LT |
| F | 77 | Urine | 6/16 | M Z P LT |
The analysis sorts isolates by their antibiotypes, the combinations of antimicrobial agents to which each isolate tested resistant. Each isolate's antibiotype is displayed by capital letters representing the antibiotics to which it tested resistant, with spaces left for those to which it tested susceptible. The analysis sorts isolates with the same antibiotype by patient and by the date on which the specimen was taken. Multiple isolates with the same antibiotype from the same patient are thus listed in descending order by date within a block adjacent to blocks of isolates of other patients with the same antibiotype. In this extracted segment of the analysis, patient A, over a 5-week period, had three sputum isolates that tested resistant to 4 (designated M FZ L) of the 11 tested agents and was the only patient with isolates of that antibiotype that year. Patient B had one and patients C and D each had two isolates that were the only ones that year with the antibiotype designated M PLTH. One of those isolates from patient C and both isolates from patient D were from specimens obtained within a 6-week period, during which each patient had been on the same one of the hospital's 56 wards. Patients E and F each had one of the only two isolates that year with the antibiotype designated M Z P LT within a 3-day period while on adjacent floors of the hospital. The examples illustrate how such analyses may alert surveillance to time and space clusters of multiresistant isolates. Patient and ward designations and antibiotypes are not identified here, for the purpose of confidentiality. EW, emergency ward.