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Table 2 HEp-2 invasiveness of the 36 AIEC isolated from patients with CD (CD1-4) and from non-IBD controls (Control 1-4)

From: Adherent-invasive Escherichia coli (AIEC) in pediatric Crohn’s disease patients: phenotypic and genetic pathogenic features

Sample origin N of invasive strains a(%) Average invasion level
CD1 14 0.50 ± 0.15
CD2 9 0.40 ± 0.11
CD3 8 0.88 ± 0.27
CD4 0 --
Control 1 4 0.67 ± 0.10
Control 2 1 0.52 ± 0.15
Control 3 0 --
Control 4 0 --
Reference strains E. coli LF82 0.95 ± 0.30
E. coli DH5α 0.007 ± 0.005
  1. aValues represent the mean percentages ± standard deviations of the means of internalised bacteria and are expressed as the ratio of intracellular CFU/number of bacteria used to infect cell monolayers X 100. Data represent mean and standard errors of three independent experiments, in duplicate.
  2. --, not determined.