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Table 1 Mean terminal restriction fragment (T-RF) number for digesta and mucosal samples obtained from beef cattle administered (AS700) or not administered antimicrobial growth promoters (Control) a

From: Effect of antimicrobial growth promoter administration on the intestinal microbiota of beef cattle

Sample/location AS700 Control LSDb Totalc
Digesta     
  Central jejunum 57.2 ± 2.4d 45.3 ± 8.6 a 153
  Ileum 78.5 ± 10.5 52.3 ± 8.5 ab 254
  Cecum 89.0 ± 7.7 80.2 ± 8.1 d 303
  Descending colon 67.3 ± 3.9 68.4 ± 5.2 bc 247
  Duodenum 51.8 ± 6.4 53.2 ± 11.2 ab 96
  Proximal jejunum 55.6 ± 7.0 58.0 ± 5.2 abc 166
  Central jejunum 57.4 ± 8.4 46.2 ± 8.2 a 156
  Distal jejunum 46.6 ± 10.7 52.6 ± 6.3 a 181
  Ileum 60.6 ± 13.6 54.8 ± 8.5 abc 142
  Cecum 79.6 ± 10.7 79.4 ± 12.1 d 216
  Spiral colon 57.6 ± 7.3 67.4 ± 17.9 abcd 195
  Descending colon 60.6 ± 13.2 87.4 ± 6.9 cd 267
  Rectum 62.8 ± 7.9 80.8 ± 10.4 bcd 236
  1. a All samples consisted of five replicate cattle per treatment, with the exception of digesta from the central jejunum of treatment cattle (n = 3), from the ileum of control and AS700 treatment cattle (n = 3), and from the cecum and descending colon of AS700 treated cattle (n = 4).
  2. b Within each sample type (i.e. digesta or mucosa), locations (averaged over treatment) not followed by the same letter differ (P ≤ 0.05) as determined by Fisher's least significant difference (LSD).
  3. c Total unique T-RFs (all animals combined by location and sample type).
  4. d Values represent the mean ± the standard error of the mean.