Antimicrobial resistance is widely recognized as one of the major challenges of public health worldwide, as infections by multidrug-resistant (MDR) bacteria have reached worrisome levels. Three levels of antibiotic resistance have been described Citation1: i) multi-resistance (resistance to at least three different families of antimicrobials), ii) extreme resistance (resistance to all antimicrobials except colistin) and iii) pan-drug resistance (resistance to all available antimicrobials).
Ortigosa et al. (Wed,) studied this question.