| 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 |
- 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.