TABLE 1.

Concentration of CTX-M and CMY-2 positive bacteria and E. coli by farm.

Farm	CTX-M positive				CMY-2 positive
	Bacteria		E. coli		Bacteria		E. coli
	Concentration (LogCFU/g)	SDb	Concentration (LogCFU/g)	SD	Concentration (LogCFU/g)	SD	Concentration (LogCFU/g)	SD
1	–a	–	–	–	1.10	–	1.10	–
2	1.59	0.31	–	–	1.80	–	1.80	–
3	2.57	0.61	2.33	0.34	–	–	–	–
4	1.51	0.42	1.30	–	–	–	–	–
5	1.68	0.78	–	–	–	–	–	–
6	1.14	–	–	–	–	–	–	–
7	1.38	0.34	–	–	–	–	–	–
9	1.46	0.40	1.49	0.42	1.17	0.17	1.31	0.19
10	1.70	0.63	1.61	0.53	3.21	–	–	–
11	1.29	0.24	1.49	0.12	1.30	0.17	1.30	0.17
12	1.10	–	1.01	–	–	–	–	–
13	1.22	0.24	–	–	–	–	–	–
15	1.29	0.34	–	–	–	–	–	–
16	1.10	–	–	–	1.10	–	–	–
17	1.18	–	1.18	–	1.80	–	1.80	–
18	1.63	1.07	1.63	1.07	1.76	1.14	1.76	1.14
19	1.17	0.12	1.35	–	–	–	–	–
Average	1.44	0.36	1.49	0.37	1.66	0.70	1.51	0.31

^aThe number of positive sample is zero or one. ^bSD, standard deviation.