TABLE 2.

Antimicrobial concentrations included on FASTvet (breakpoint values according CLSI).

Antimicrobial		FASTvet panel concentrations (μg/ml)
	Phenotype	S	I	R	S (urine)	R (urine)
Gram negative bacilli	Ampicillin	≤0.25	0.5	>0.5	≤8	>8
	Amoxicillin-clavulanic acid	≤0.25/0.12	0.5/0.25	>0.5/0.25	≤8/4	>8/4
	Piperacillin-tazobactam*	≤16/4	64/4	>64/4
	Cefpodoxime	≤2	4	>4
	Imipenem* Enterobacterales	≤1	2	>2
	Imipenem* Pseudomonas spp.	≤2	4	>4
	Enrofloxacin Enterobacterales	≤0.12	0.25	>0.25
	Enrofloxacin Pseudomonas spp.	≤0.5	2	>2
	Gentamicin	≤2	4	>4
	Amikacin	≤4	8	>8
Staphylococcus spp.	Penicillin*	≤0.12		>0.12
	Cefoxitin*	≤4		>4
	Enrofloxacin	≤0.5	2	>2
	Vancomycin* S. aureus	≤2	8	>8
Enterococcus spp.	Vancomycin* S. coagulase neg	≤4	16	>16
	Ampicillin*	≤8		>8
	Vancomycin*	≤4	16	>16

*Human breakpoints. According to flow cytometry analysis when the cells show lesions with the lowest concentration tested, the strain is considered S (susceptible); if no lesion is shown with the lower concentration and but only with the second concentration, the strain is considered I (intermediate); if even with the highest concentration no effect is seen, the strain is considered R (resistant). The category of I is not always present.