THERMOPHILIC ACID RESISTANT MEDIUM

Description

Thermophilic Acid Resistant Medium is a medium supporting the growth of thermophilic, acid resistant microorganisms such as Bacillus stearothermophilus and other Bacillus species like B.coagulans (B. thermoacidurans) . These organisms cause flat-sour spoilage i.e acid production, but no gas in canned foods. B.coagulans have been isolated from canned tomato vegetable juice mixes, tomato juice, tomato puree, tomato soup and canned whole tomatoes. The organisms are found to multiply in tomato washing equipments where the volume of cold water is insufficient and the water temperature may reach 27 to 32?C. B. stearothermophilus shows growth at 55?C, poor growth at 37?C and no growth at 20?C. Both the organisms can grow at low pH.