Hoyle's agar
Hoyle's agar is a selective medium that uses tellurite to differentially select Corynebacterium diphtheriae from other upper respiratory tract flora. The medium appears cream to yellow colored, and takes the form of a free-floating powder. It is a modification of Neill's medium.[1]
Hoyle's tellurite agar contains:
| Proteose peptone | 10 g/L |
| Beef extract | 10 g/L |
| Sodium chloride | 5 g/L |
| Blood, laked | |
| Tellurite | 0.35 g/L |
| Agar | 15 g/L |
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