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Table 2 L. monocytogenes mixed culture infections in guinea pigs

From: Oxygen restriction increases the infective potential of Listeria monocytogenes in vitro in Caco-2 cells and in vivo in guinea pigs

  Un-restricted Oxygen-restricted
Fluorescence CFP YFP Total Mean log(CFU/g) CFP YFP Total Mean log(CFU/g)
Liver 1/12 1/12 2/24 (8%) 1.5 ± 0.21 10/12 8/12 18/24 (75%) 1.9 ± 0.32
Spleen 3/12 1/12 4/24 (17%) 1.9 ± 0.76 7/12 5/12 12/24 (50%) 2.1 ± 0.58
Jejunum 1/12 1/12 2/24 (8%) 2.2 ± 0.21 8/12 6/12 14/24 (58%) 3.1 ± 0.65
  1. Numbers of guinea pigs where L. monocytogenes was recovered from liver and spleen after oral dosage with a 1:1 mixture of un-restricted and oxygen-restricted L. monocytogenes, carrying either of the two different fluorescent labels CFP and YFP. Samples were taken either four or seven days post first dosage. Mean log (CFU/g) designate the mean levels found in animals positive for Listeria in the given organs, followed by standard deviations.