Table 1. List of strains.
| Name | International code | activity index to SSG | SSG-susceptibility |
| BPK282/0cl4 | MHOM/NP/02/BPK282/0cl4 | 1 | S |
| BPK294/0cl1 | MHOM/NP/03/BPK294/0cl1 | 1 | S |
| BPK043/0cl2 | MHOM/NP/02/BPK043/0cl2 | 0 | S |
| BPK091/0cl9 | MHOM/NP/02/BPK091/0cl9 | 0 | S |
| BPK206/0cl10 | MHOM/NP/03/BPK206/0cl10 | 1 | S |
| BPK080/0cl1 | MHOM/NP/02/BPK080/0cl1 | 1 | S |
| BPK298/0cl8 | MHOM/NP/03/BPK298/0cl8 | 1 | S |
| BPK178/0cl3 | MHOM/NP/02/BPK178/0cl3 | 2 | S |
| BPK190/0cl3 | MHOM/NP/03/BPK190/0cl3 | >6 | R |
| BPK085/0cl3 | MHOM/NP/02/BPK085/0cl3 | >6 | R |
| BPK275/0cl12 | MHOM/NP/03/BPK275/0cl12 | >6 | R |
| BPK164/1cl11 | MHOM/NP/02/BPK164/1cl11 | >3 | R |
| BPK173/0cl3 | MHOM/NP/02/BPK173/0cl3 | >6 | R |
| BPK087/0cl11 | MHOM/NP/02/BPK087/0cl11 | 3 | R |
All strains are derived from isolates taken before the onset of treatment, except for BPK164/1cl11 which is derived from an isolate taken at the end of treatment. The activity index to SSG is the ratio of the ED50 of a tested strain to the ED50 of the sensitive reference strain BPK206/0cl10. A strain with an activity index of 3 or higher is considered to be SSG-resistant as described elsewhere [4].