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Table 4 Distribution of gene cassette arrays found in class 1 integrons among phylogenetic groups of E. coli belongs to Ec-MRnoB collection

From: Molecular characterization of multiresistant Escherichia coli producing or not extended-spectrum β-lactamases

   Phylogenetic groups (number of isolates)
Cassettes Total A (N=14) B1 (N=9) B2 (N=7) D (N=15)
ant(3″ )-Ia 5 0 3 (33.3%) 1 (14.3%) 1 (6.7%)
dfrA1-ant(3″ )-Ia 6 3 (21.4%) 1 (11.1%) 0 2 (13.3%)
bla OXA-1 - ant(3″ )-Ia 1 1 (7.1%) 0 0 0
dfrA12 - ant(3″ )-Ib 3 1 (7.1%) 0 1 (14.3%) 1 (6.7%)
dfrA16 - ant(3″ )-Ib 0 0 0 0 0
dfrA17 - ant(3″ )-Ie 16 4 (28.6%) 2 (22.2%) 4 (57.1%) 6 (40%)
ant(2″ )-Ia 1 0 0 0 1 (6.7%)
ant(3″ )-Ia - ant(2″ )-Ia 2 2 (14.3%) 0 0 0