Table 3.

Development of bacteremia and meningitis (defined as positive CSF cultures) in two groups of newborn rats receivingE. coli E44 or 7A-33

E. coli strainNo. of animalsBacteremia (log CFU/ml of blood [mean ± SD])No. (%) of animals with positive CSF
7A-33257.01 ± 1.174 (16)a
E44277.06 ± 1.2915 (56)
  • a The P value was 0.003 (Fisher’s exact test) for animals receiving 7A-33 compared to animals receiving E44.