TABLE 5.

Reproducibility testing results across three brands of commercial Mueller Hinton agar—Hardy Diagnostics, Becton–Dickinson, and Thermo Fisher Scientific (Remel)

Isolate	Susceptibility phenotype	Strip cross MIC (μg/mL)
		Hardy	BD	Remel
E. cloacae AR38	ATM resistant, CZA resistant ATM–CZA combination susceptible	1	1	1
K. pneumoniae AR40		1	1	1
E. coli AR48		4	4	4
M. morganii AR57		0.25	0.25	0.25
K. pneumoniae AR68		2	2	2
K. aerogenes AR161		0.25	0.25	0.25
K. pneumoniae AR453		2	2	2
S. maltophilia 160		4	4	4
E. coli AR1055	ATM resistant, CZA resistant ATM–CZA combination resistant	≥256	≥256	≥256
P. aeruginosa AR235		≥256	≥256	≥256
E. coli AR348		≥256	≥256	≥256
P. aeruginosa AR1112		128	64	64
E. coli AR434		≥256	≥256	≥256
S. maltophilia 159	ATM resistant, CZA susceptible ATM–CZA combination susceptible	0.5	0.5	0.5
E. cloacae AR02		1	1	1
K. pneumoniae AR03		2	2	1