TABLE 1.

Azithromycin MIC and inhibition zone diameter results of N. gonorrhoeae ATCC 49226 and nine WHO reference strains

Reference strain	Azithromycin MIC (μg/ml)		Zone diam (mm)
	Reference MICa	MIC in present study	Range	Median
WHO F	0.125	0.125–0.25	32–37	34
WHO N	0.25	0.125–0.25	36–38	37
WHO O	0.25	0.25–0.5	32–37	34
WHO P	4	4	22–25	24
WHO U	4	4	22–25	23
WHO W	0.5	0.25–0.5	35–38	36
WHO X	0.5	0.25–0.5	36–38	38
WHO Y	1	0.5–1	32–37	36
WHO Z	1	1	30–33	31
ATCC 49226	0.25–1	0.25–0.5	35–37	36

^aBased on references 13 and 7.