3,200+ step-by-step lab protocols and SOPs for cell culture, staining, PCR, protein work and microbiology, with reagents, conditions and evaluation criteria.
Dextrose Tryptone Agar is recommended for the determination of mesophilic and thermophilic bacteria in sweetening agents used in frozen desserts. Bromcresol purple is used as a pH indicator. When isolating thermophilic bacteria use 55°C as a plating temperature.
Dextrose agar is used for the culture of microorganisms with or without added blood. Supplementation with 5% blood provides additional growth factors for fastidious microorganisms. When pH is lowered to 3.5 medium can be used to obtain total counts of yeasts in food.
EC Medium was developed by Hajna and Perry to differentiate between fecal and non-fecal coliform bacteria. It is a buffered lactose broth which also contains bile salts which inhibits Gram positive cocci and spore formers. It was designed to improve the isolation and detection of E coli in ...
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