Table 3. Amino acid alterations in the quinolone resistance-determining regions of Chryseobacterium indologenes isolates.

Amino acid	Susceptibility of levofloxacin, n (%)		P value
	Susceptible (n=20)	Non-susceptible (n=115)
Position 83 of GyrA
Serine	20 (100.0)	2 (1.7)	<0.001
Valine	0 (0.0)	50 (43.5)	<0.001
Tyrosine	0 (0.0)	60 (52.2)	<0.001
Phenylalanine	0 (0.0)	3 (2.6)	>0.999
Position 87 of GyrA
Aspartic acid	19 (95.0)	53 (46.1)	<0.001
Glycine	1 (5.0)	62 (53.9)
Position 425 of GyrB
Leucine	2 (10.0)	2 (1.7)	0.1044
Isoleucine	18 (90.0)	113 (98.3)
Position 473 of GyrB
Lysine	2 (10.0)	2 (1.7)	0.1044
Arginine	18 (90.0)	113 (98.3)
Position 539 of ParE
Valine	20 (100.0)	105 (91.3)	0.3575
Isoleucine	0 (0.0)	10 (8.7)