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Definitions of the various categories of drug resistance. Adapted from Reference [29].
| Category | Definition |
|---|---|
| Multidrug resistance (MDR) | Non-susceptibility to at least one agent in three or more antimicrobial categories |
| Extensively drug resistance (XDR) | Non-susceptibility to at least one agent in all but two or fewer antimicrobial categories |
| Pan drug resistance (PDR) | Non-susceptibility to all agents in all antimicrobial categories |
