TABLE 3.
Cross immunity of Streptococcus hyointestinalis DPC6484 to other nisin-producing strains
| Target organism | Area of zone of inhibition (cm2)a with CFS containing the following bacteriocin: |
|||
|---|---|---|---|---|
| Nisin A | Nisin H | Nisin U | Lacticin 3147 | |
| L. delbrueckii subsp. bulgaricus LMG6901 | 11.41 ± 0.64 | 8.01 ± 0.00 | 8.17 ± 0.28 | 2.66 ± 0.00 |
| L. lactis NZ9700 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 | 1.66 ± 0.14 |
| S. hyointestinalis DPC6484 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 | 1.75 ± 0.30 |
| S. uberis strain 42 | 0.32 ± 0.00 | 0.69 ± 0.00 | 0.00 ± 0.00 | 0.97 ± 0.24 |
| L. lactis DPC3251 | 0.32 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 |
a
Calculated as (πr12) − (πr22), where r1 is the radius of the zone and r2 is the radius of the well (in centimeters).