Putatively assigned genera (on the basis of partial 16S rRNA gene sequences) of integron carrying isolates.

Un.B, Unclassified bacterium; Isolates exhibiting similar phenotype: a, Acidovorax sp.; b, Acinetobacter sp.; c, Shigella sp.; d, Klebsiella sp.; e, Enterobacter sp.; f, Proteus sp.; g, Salmonella sp.; h, Providencia sp.; i, Serratia sp.; j and k, Citrobacter.; l–n, Unknown bacterium; o, Escherichia sp.; p and q, Aeromonas sp.; r, Pseudomonas sp.; A. johnsonii, Acinetobacter johnsonii; B. siliguriense, Brevibacterium siliguirense; K. pneumoniae, Klebsiella pneumoniae; rDNA, ribosomal deoxyribonucleic acid.