Table 3. Similarity of the plasmids and isolates between the different screening time points or within a single time point (TX).

	All isolates		E. coli isolates only
Timepoints	Number (n) of similar plasmid patterns (%)	Number (n) of all Cases	Number (n) of similar RAPD patterns (%)	Number (n) of co-similar plasmid and RAPD patternsC (%)	Number (n) of all cases
TXA	10 (76.9 %)	13	3 (33.3%)	2 (22.2%)	9
T0/T1B	53 (67.9%)	78	28 (38.6 %)	15 (20.5 %)	73
T1/T2B	10 (34.5 %)	29	7 (25.9 %)	6 (22.2%)	27
T0/T2B	11 (40.7 %)	27	6 (21.4 %)	4 (14.3 %)	28
T0/T1/T2	8 (34.8 %)	23	2 (9.1 %)	2 (9.1 %)	22

^ATX, cases with multiple isolates of the same species at a given time point;

^Bcases where all three screenings were collected (T0/T1/T2);

^Cco-similar plasmid and RAPD patterns in one isolate.