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Food
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BAM Media M1: A-1 Medium
January 2001
Bacteriological Analytical Manual
M1
A-1 Medium
| Tryptone | 20 g |
| Lactose | 5 g |
| NaCl | 5 g |
| *Triton X-100 (Rohm & Haas) | 1 ml |
| Salicin | 0.5 g |
| Distilled water | 1 liter |
Dissolve ingredients in 1 liter distilled water. Adjust pH to 6.9 ± 0.1. Dispense 10 ml portions of single strength broth into 18 x 150 mm tubes containing inverted fermentation vials. For double strength broth, use 22 x 175 mm tubes containing inverted fermentation vials. Medium may be cloudy before sterilization. Autoclave 10 min at 121°C.
Store in dark up to 7 days.
(Commercially available A-1 medium is unacceptable)
| Storage | dark, up to 7 days |
*Triton X-100 may be purchased from Fisher Scientific Company, Fairlawn, NJ 07410.
Original Source: Bacteriological Analytical Manual, 8th Edition, Revision A, 1998.
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