Table 1.
Summary of the susceptibility of the Salmonella and Shigella spp. strains to the 3 commercial bacteriophage cocktails
| Phage Cocktails | Strain groups | Results of the spot test (%) a |
||||
|---|---|---|---|---|---|---|
| R | + | ++ | +++ | ++++ | ||
| PYO Bacteriophage (Eliava) | Overall strains (n = 50) | 56.0 | 4.0 | 24.0 | 12.0 | 4.0 |
| Salmonella spp. (n = 30) | 90.0 | 3.3 | 0.0 | 3.3 | 3.3 | |
| Shigella spp. (n = 20) | 5.0 | 5.0 | 55.0 | 30.0 | 5.0 | |
| INTESTI Bacteriophage (Eliava) | Overall strains (n = 50) | 10.0 | 6.0 | 20.0 | 36.0 | 28.0 |
| Salmonella spp. (n = 30) | 13.3 | 3.3 | 6.7 | 33.3 | 43.3 | |
| Shigella spp. (n = 20) | 5.0 | 10.0 | 40.0 | 40.0 | 5.0 | |
| Septaphage (Biochimpharm) | Overall strains (n = 50) | 32.0 | 42.0 | 20.0 | 0.0 | 6.0 |
| Salmonella spp. (n = 30) | 23.3 | 53.3 | 23.3 | 0.0 | 0.0 | |
| Shigella spp. (n = 20) | 45.0 | 25.0 | 15.0 | 0.0 | 15.0 | |
a Strains were defined as susceptible to the bacteriophages when confluent lysis (ie, complete clearing: ++++), semi-confluent lysis (ie, clearing throughout but with faint hazy background: +++), opaque lysis (ie, turbidity throughout the cleared zone: ++), taches vierges (ie, a few individual plaques: +) were recorded. Strains showing no activity (ie, no clearing “R”) were defined as resistant.