Table 2 β-Lactamase activity and presence of blaZ in laboratory-stock BIVR and non-BIVR strains

Reference strains

FDA209P (MSSA)

-

<1 × 10^-4

N315 (non-BIVR)

+

7.39 × 10^-1

Mu3 (BIVR)

-

<1 × 10^-4

BIVR strains

K101

-

<1 × 10^-4

K638

-

<1 × 10^-4

K670

-

<1 × 10^-4

K744

-

<1 × 10^-4

K2480

-

<1 × 10^-4

Non-BIVR strains

K1

+

1.94 × 10^-1

K27

+

1.27 × 10^-1

K51

+

6.24 × 10^-1

K54

+

11.1

K1179

+

9.06 × 10^-1

Transformants

K744-T

+

<1 × 10^-4

K2480-T

+

<1 × 10^-4