Antimicrobial resistances do not affect colonization parameters of intestinal E. coli in a small piglet group

Table 3 Colonization Study: Comparison of single antimicrobial resistance and a colonization success of E. coli clones from the rectal content of 5 piglets.

	resistance to
	ampicillin		streptomycin		spectinomycin		tetracycline		sulfamethoxazole
	yes	no	yes	no	yes	no	yes	no	yes	no
number of clones	n = 10	n = 34	n = 13	n = 31	n = 9	n = 35	n = 30	n = 14	n = 15	n = 29
maximum numbers ^a	11 (1/19)*	2 (1/20)	2 (1/19)	2 (1/20)	2 (1/19)	2 (1/20)	2 (1/20)	1 (1/20)	2 (1/19)	2 (1/20)
total numbers in all samples ^b	16 (1/199)	2 (1/106)	2 (1/48)	4 (1/199)	4 (1/48)	2 (1/199)	4 (1/199)	2 (1/79)	4 (1/199)	2 (1/106)
numbers of piglets ^c	2 (1/5)	1 (1/5)	1 (1/5)	2 (1/5)	1 (1/5)	2 (1/5)	1.5 (1/5)	2 (1/4)	1 (1/5)	2 (1/5)
time points ^d	2 (1/8)	1 (1/6)	1 (1/6)	2 (1/8)	1 (1/6)	1 (1/8)	1.5 (1/8)	1 (1/4)	1 (1/8)	1 (1/6)

^a maximum numbers of isolates of one clone in one sample, as we included 20 isolates of one sample there was a theoretical range between 0 and 20 isolates per clone
^b total numbers including all isolates from all samples of one clone, as we included 800 isolates from all piglets over the whole eight week period and detected 44 clones a theoretical range between 1 and 757.
^c numbers of colonized piglets with a specific clone, as we included five piglets a theoretical range between 0 and 5
^d numbers of time points of the detection of a specific clone, as we sampled over an eight week period a theoretical range between 1 and 8
* median (min/max)

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