TABLE 2.

Stability tests using panels stored at different temperatures for 3 months

Panel storage temp and strain	MIC (μg/ml)
	Expected range	T0	T7	T14	T30	T90
4°C
ATCC 25922	0.25–2a	1	0.5	0.25	0.5	0.5
ATCC 27853	0.5–4a	1	1	1	1	1
CSR-55	4–16	16	8	8	8	8
CSR-57	1–4	4	4	2	4	4
CSR-68	8–32	≥16	≥16	≥16	≥16	≥16
NCTC 13846	2–8a	4	16	4	4	8
Negative control		NGb	NG	NG	NG	NG
Room temp
ATCC 25922	0.25–2a	0.5	0.5	0.5	1	1
ATCC 27853	0.5–4a	1	1	1	1	1
CSR-55	4–16	8	16	8	16	8
CSR-57	1–4	4	4	2	4	4
CSR-68	8–32	≥16	≥16	≥16	≥16	≥16
NCTC 13846	2–8a	4	4	4	4	4
Negative control		NG	NG	NG	NG	NG
35°C
ATCC 25922	0.25–2a	0.5	0.5	0.5	1	1
ATCC 27853	0.5–4a	1	1	1	1	2
CSR-55	4–16	8	8	8	8	≥16
CSR-57	1–4	4	4	4	4	4
CSR-68	8–32	≥16	≥16	≥16	≥16	≥16
NCTC 13846	2–8a	4	4	4	4	8
Negative control		NG	NG	NG	NG	NG

^aAccording to EUCAST Routine and Extended Internal Quality Control for MIC Determination and Disk Diffusion (version 7.0, valid from 1 January 2017).

^bNG, no growth.