Detection of Extended Spectrum Beta-Lactamases Resistance Genes among Bacteria Isolated from Selected Drinking Water Distribution Channels in Southwestern Nigeria

Table 1

Classes and families of selected bacteria.

Source	Class	Family	Number (% of total from source)
Raw water	α-Proteobacteria	Brucellaceae	1 (1.51)
	β-Proteobacteria	Alcaligenaceae	9 (13.64)
		Neisseriaceae	1 (1.51)
	-Proteobacteria	Enterobacteriaceae	27 (40.91)
		Moraxellaceae	2 (3.03)
		Aeromonadaceae	6 (9.09)
		Xanthomonadaceae	2 (3.03)
	Flavobacteriia	Myroidaceae	1 (1.51)
	Uncultured bacteria clone		3 (4.55)
	Bacilli	Bacillaceae	10 (15.15)
		Staphylococcaceae	3 (4.55)
	Actinobacteria	Microbacteriaceae	1 (1.51)
	Total raw water		66
Treated water	α-Proteobacteria	Caulobacteraceae	1 (3.03)
	β-Proteobacteria	Alcaligenaceae	5 (15.15)
		Neisseriaceae	1 (3.03)
	-Proteobacteria	Enterobacteriaceae	10 (30.30)
	Flavobacteriia	Myroidaceae	1 (3.03)
	Uncultured bacteria clone		2 (6.06)
	Bacilli	Bacillaceae	12 (36.36)
		Staphylococcaceae	1 (3.03)
	Total treated water		33
Municipal taps	α-Proteobacteria	Caulobacteraceae	1 (1.47)
	β-Proteobacteria	Alcaligenaceae	7 (10.29)
		Neisseriaceae	3 (4.41)
	-Proteobacteria	Enterobacteriaceae	21 (30.88)
		Moraxellaceae	6 (8.82)
	Flavobacteriia	Myroidaceae	3 (4.41)
	Uncultured bacteria clone
	Bacilli	Bacillaceae	26 (38.24)
		Staphylococcaceae	1 (1.47)
	Total municipal tap		68

Note: identification was based on 16S rDNA sequencing. These bacteria were obtained from our previous works [3–5].