Isolation frequency of Stenotrophomonas maltophilia and Achromobacter xylosoxidans in the cultures of 54 patients in a median time of observation pre and post-treatment of 16 months
| Pretreatment, n | Post-treatment, n | |
| Cultures positive for S maltophilia | 16 | 80 |
| Cultures positive for A xylosoxidans | 15 | 19 |
| Total number of cultures positive for non-fermenter Gram negatives | 31 | 99 |
| Total number of cultures negative for non-fermenter Gram negatives | 303 | 381 |