Table 2.

Superior fitness of international MDR clone strains vis-a-vis minor clone isolates demonstrated by propagation assays.

Article	MDR pathogen	Result of fitness test
Horvath et al. (2012)	MRSA	ST5, ST22 strains transcend fluoroq. resistant ST30, ST8 minor clone isolates
Knight et al. (2012)	MRSA	CC22 strains transcend CC30, ST239 fluoroq. resistant isolates
Toth et al. (2014)	MDR K. pneumoniae	ST11, ST15, ST147 strains transcend fluoroq. resistant minor clone isolates
Johnson et al. (2015b)	MDR E. coli	ST131 H30 strains transcend minor clone isolates when exposed to fluoroq.
Vernon et al. (2019)	MDR C. difficile	GyrA Thre82Ile confers a fitness advantage on 027 strains of C. difficile