Ten years of external quality assessment (EQA) of Neisseria gonorrhoeae antimicrobial susceptibility testing in Europe elucidate high reliability of data

Table 5 MIC concordance and variation from the modal MIC in the European gonococcal External Quality Assessments (EQAs), 2007–2016 (no EQA in 2013)

		Azithromycin		Cefixime^a		Ceftriaxone		Ciprofloxacin		Gentamicin^a		Spectinomycin		Total
		No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%
2007–2011	Within 1 MIC log₂ dilution^b	1284	90	301	94	1331	84	1502	94	233	99	1038	91	5690	90
	Within 2 MIC log₂ dilutions	123	99	13	98	172	95	80	99	2	100	76	98	466	98
	> 2 MIC log₂ dilutions	19	1	6	2	76	5	24	1	0	0	26	2	151	2
	Total no. of isolates with MIC data	1426		320		1579		1606		235		1140		6307
2012–2016	Within 1 MIC log₂ dilution^b	701	88	757	93	728	88	728	90	482	93	660	92	4056	91
	Within 2 MIC log₂ dilutions	65	96	33	97	77	97	45	96	30	99	45	98	295	97
	> 2 MIC log₂ dilutions	28	4	22	3	27	3	36	4	4	1	11	2	128	3
	Total no. of isolates with MIC data	794		812		832		809		516		716		4479
All years	Within 1 MIC log₂ dilution^b	1985	89	1058	93	2059	85	2230	92	715	95	1698	91	9745	90
	Within 2 MIC log₂ dilutions	188	98	46	98	249	96	125	98	32	99	121	98	761	97
	> 2 MIC log₂ dilutions	47	2	28	2	103	4	60	2	4	1	37	2	279	3
	Total no. of isolates with MIC data	2220		1132		2411		2415		751		1856		10,785

^aCefixime and gentamicin were not included in the 2007–2009 External Quality Assessment distributions
^bEssential agreement

ISSN: 1471-2334