Table 2.
Summary of notation.
| Symbol | Definition |
|---|---|
| B | Birth rate |
| β | Transmission rate constant |
| si | Probability that de novo resistance emerges when drug i is used |
| ρ | Rate at which treated individuals return to susceptible state |
| δ | Death rate |
| S | Susceptible population |
| W | Population infected with a susceptible strain |
| Xi | Population infected with a strain that is resistant to drug i |
| I | Infected population |
| fi | Fraction of patients (symptomatic) who are treated with drug i, i = 1,2,..n |
| f0 | Fraction of patients who are treated with no drug |
| n | Number of drugs |