TABLE 1.
Strains of L. monocytogenes used for this studya
| Strain | Serovar | Virulence | Information | Reference or source (reference[s])b |
|---|---|---|---|---|
| CLIP80459 | 4b | A | Human, epidemic, France, 1999 | 9 |
| CLIP90602 | 1/2b | A | Human, epidemic, France | 33 |
| CLIP92347 | 1/2a | A | Human, epidemic, France | This study |
| EGDe | 1/2a | A | Rabbit outbreak, England, 1924 | 14 |
| CLIP93667 | 4b | A | Healthy 3-year-old child, France, 1992 | H2 (27, 28, 33) |
| CLIP93679 | 4b | A | Healthy 39-year-old man, France, 1991 | H12 (28) |
| CLIP93672 | 1/2b | B | Healthy 7-year-old child, France, 1994 | H28 (28) |
| CLIP93677 | 1/2a | B | Healthy carrier, France | H38 (28) |
| CLIP93665 | 4b | A | Milk plant, France | 33 |
| CLIP93649 | 1/2a | A | Milk plant, France | 33 |
| CLIP93663 | 1/2a | B | Milk plant, France | This study |
| CLIP93657 | 1/2a | B | Milk plant, France | This study |
a
The levels of virulence of the 12 strains in 14-day-old chick embryos were assessed as previously described (28). Virulence A means infection of chick embryos resulted in 100% mortality within 3 days. Virulence B means infection of chick embryos resulted in 80% mortality in more than 3 days. CLIP stands for Collection Listeria Institut Pasteur.
b
H2, H12, H28, and H38, strains referenced by Olier et al. (28).