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

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

  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)
  1. 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
  2. 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.
  3. c numbers of colonized piglets with a specific clone, as we included five piglets a theoretical range between 0 and 5
  4. 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
  5. * median (min/max)