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. 2011 Mar 2;2:40. doi: 10.3389/fmicb.2011.00040

Table 4.

Tetracycline resistance genes unique to environmental bacteria.

Efflux 12/27 (44%) Ribosomal protection 3/12 (25%) Enzymatic 2/3 (66%)
tetA(P), tet(V), tet(30), tet(35) tetB(P), otr(A), tet tet(X)a, tet(34)
tet(33), tet(39), tet(41),
tet(42), tet(43)
otr(B), otr(C), tcr3

aThe tet(X) is only functional in environmental Spingobacterium spp. although it is found in Bacteroides spp.