Table 1.
Inhibition of the growth of M. haemolytica by P. multocida
| Bacterial strain combination (M. haemolytica strain, P. multocida strain)a | Mean no. of bacteria (log10 CFU/ml)b |
|||
|---|---|---|---|---|
|
M. haemolytica |
P. multocida |
|||
| Monoculture | Coculture | Monoculture | Coculture | |
| A1 mutant, BHS3272 | 6.95 | 2.87 | 8.87 | 8.83 |
| A1 mutant, 07/1920/139 | 7.21 | 2.68 | 9.29 | 8.65 |
| A1 mutant, 95/1545/4 | 7.32 | 4.15 | 8.47 | 7.94 |
| 10/2/3 (gfp), 96/65/2 | 8.04 | 4.96 | 8.09 | 8.17 |
| 91N-10, 07/1920/139 | 8.34 | 5.57 | 9.50 | 8.44 |
| 91N-10, BHS3272 | 8.05 | 4.23 | 7.70 | 7.60 |
a
Three different isolates of M. haemolytica were cocultured with four different isolates of P. multocida in different combinations.
b
The numbers represent the log10 CFU/ml of the coculture at after 24 h. The difference in the CFU/ml for M. haemolytica in monocultures and cocultures is statistically significant (P < 0.0001). Results are based on two independent experiments, except for the first two combinations of bacterial strains, which are based on three independent experiments.