Table 1. Prevalence of gentamicin-resistant bacteria and 16S rRNA methylases genes in Japanese animals.

Origin	Bacterial species	Year	n	Gentamicin resistancea)	16S rRNA methylases
Canine fecal samples	Escherichia coli	2005	212	33 (15.6%)	rmtB 2 (0.9%)
	E. coli	2015–2016	234	69 (29.5%)	0
Cattle, Pig, Chicken fecal samples	E. coli	2004–2005	1,029	20 (1.9%)	0
	E. coli	2013–2014	1,418	14 (1.0%)	0
Canine, Feline clinical specimens	Klebsiella spp.	2003–2015	103	32 (31.1%)	armA 1 (1.0%)
	Enterobacter spp.	2003–2015	65	17 (26.2%)	0
	Acinetobacter spp.	2003–2015	81	5 (6.2%)	0

a) Gentamicin resistance indicates a minimum inhibitory concentration ≥16 µg/ml.