TABLE 6.
Characterization of Salmonella strains isolated from eggs
| Serovar (no. of strains) and farm | No. of strains | RAPD profilea | Virulence typing (avrA sopE spvC) | ATB profileb |
|---|---|---|---|---|
| Enteritidis (8) | I | + + + | S | |
| F | 1 | I | + + + | S |
| G | 1 | I | + + + | S |
| N | 2 | I | + + + | S |
| S | 3 | I | + + + | S |
| S | 1 | I | + + − | S |
| Derby (39) | II | + − − | S | |
| A | 3 | II | + − − | S |
| C | 6 | II | + − − | S |
| E | 11 | II | + − − | S |
| L | 3 | II | + − − | S |
| N | 2 | II | + − − | S |
| P | 1 | II | + − − | S |
| R | 7 | II | + − − | S |
| T | 4 | II | + − − | S |
| N | 1 | II | + − − | S |
| R | 1 | II | + − − | S |
| Panama (2) | ||||
| T | 1 | III | + − − | R1 |
| D | 1 | III | + − − | R1 |
| Gallinarum (9) | ||||
| G | 2 | IV | + + + | S |
| G | 1 | V | + + + | R3 |
| G | 2 | VI | + + − | S |
| A | 2 | VI | + + − | R2 |
| C | 1 | VI | + + − | R2 |
| I | 1 | VI | + + − | R2 |
a
RAPD profiles correspond to a combination of amplification patterns obtained with four primers as described in Materials and Methods.
b
ATB profile, antibiotic resistance profile. S, susceptible to all drugs tested. R1, resistant to ampicillin, cephalothin, cefuroxime, and ceftazidime and susceptible to all other antibiotics tested. R2, resistant to nalidixic acid and susceptible to all other antibiotics tested. R3, intermediate susceptibility to ampicillin and susceptible to all other antibiotics tested.