FIG. 1.

Jejunal and ileal tissue taken from five pigs fed a standard diet. Jejunal tissue and ileal tissue was inoculated with either E. coli or Salmonella and incubated for 1 h at 37°C. The numbers of E. coli and the number of salmonellae that had associated with the tissue were counted (n = 10, where n denotes the number of organ cultures).