TABLE 1.

Bacterial strains used in this work

Bacterial strainCharacteristic(s)Source or reference
Listeria monocytogenes
    Wild type (EGDwt)Virulent EGDe strain12
EGD mutants
    ΔInlABInlAB deletedP. Cossart (Institut Pasteur, Paris)
    ΔLLO1,080-bp deletion in hly gene15
    ΔActA1,752-bp deletion in actA gene7
    ΔActA+actAInsertion of actA gene in ΔActA mutantThis work
Listeria innocua
    L. innocua CIP 11254Wild typeInstitut Pasteur Collection