Table 1.

Summary of characterised CL1 gene casette arrays

	DS species, observed number	US species, number observed
3′-CS CL1s
C1	E. coli ST1193, E. coli ST209, E. coli ST404, E. coli ST unknown (2), K. oxytoca	E. coli ST73, E. coli ST28, A. media (2)
C2	A. media (2), A. salmonicida, E. coli ST (unknown)	E. coli ST2695
C3	R. ornithinolytica, C. freundii	C. freundii
C4	C. freundii	R. ornithinolytica
C5	E. coli ST1193, E. coli ST unknown	None observed
C6	A. media	None observed
C7	None observed	A. salmonicida (2), A. media, P. putida, C. freundii
C8	E. coli ST unknown, A. media (2), A. salmonicida	None observed
Atypical CL1s
A1	E. coli ST10	E. coli ST73
A2	E. coli ST unknown, E. coli ST1060	None observed
A3	None observed	E. coli ST unknown (2)
A4	None observed	E. coli ST unknown (2)
A5	P. gessardi	None observed
A6	E. coli ST989	A. media
A7	E. coli ST131	None observed
A8	None observed	A. sobria
A9	None observed	A. media
A10	E. coli ST131 (2), E. coli ST unknown, C. freundii	C. freundii

Table of CL1 gene cassette arrays characterised and the bacteria associated with each one. Bacteria were isolated from aquatic sediments (DS) and upstream (US) of a WWTP outflow. ST unknown—does not match to anything in database