TABLE 1.

Intracellular survival of various strains of E. coli in macrophages

E. coli strainPhenotypeSurvival (104 CFU/well) ina:
RAW 264.7 cellsTHP-M cells
1 h4 h24 h1 h4 h24 h
E44OmpA+ K1+ Sfa+ IbeA+ IbeB+3.1 ± 0.48.8 ± 1.51.1 ± 0.51.2 ± 1.02.7 ± 0.50.5 ± 0.5
E91OmpA K1+ Sfa+ IbeA+ IbeB+0.5 ± 0.50.7 ± 0.20.1 ± 0.20.2 ± 0.10.1 ± 0.10.1 ± 0.1
E66OmpA+ K1 Sfa+ IbeA+ IbeB+6.0 ± 0.912.4 ± 1.61.6 ± 0.53.0 ± 0.75.1 ± 0.90.7 ± 0.2
E44 SOmpA+ K1+ Sfa IbeA+ IbeB+3.9 ± 0.67.2 ± 0.70.7 ± 0.61.4 ± 0.42.9 ± 0.70.9 ± 0.4
10A23OmpA+ K1+ Sfa+ IbeAIbeB+1.9 ± 0.53.2 ± 0.60.2 ± 0.30.7 ± 0.41.1 ± 0.40.2 ± 0.2
7A33OmpA+ K1+ Sfa+ IbeA+ IbeB6.1 ± 1.212.1 ± 0.91.1 ± 0.81.8 ± 0.63.4 ± 0.70.9 ± 0.4
E105pOmpA+ K1+ Sfa+ IbeA+ IbeB+3.8 ± 0.99.1 ± 0.71.7 ± 0.71.4 ± 0.73.7 ± 0.40.7 ± 0.8
E111OmpA K1+ Sfa+ IbeA+ IbeB+0.4 ± 0.50.6 ± 0.40.1 ± 0.20.3 ± 0.30.9 ± 0.20.1 ± 0.3
  • a The values are means ± standard deviations.