Table 2

L. monocytogenes mixed culture infections 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


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.

Bo Andersen et al. BMC Microbiology 2007 7:55   doi:10.1186/1471-2180-7-55

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