Modelling the survival of starter lactic acid bacteria and Bifidobacterium bifidum in single and simultaneous cultures.
The inactivation kinetics at 4 degrees C of Bifidobacterium bifidum, Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus, cultured alone or consociated in a laboratory medium (modified MRS broth), were modelled through the Weibull model and a second-order polynomial equation. The initial cell number of S. thermophilus and L. delbrueckii subsp. bulgaricus was approximately 6-7log (CFU/ml); the viability loss after 30 days of storage was 2.87 and 1.99log (CFU/l) for L. delbruckii subsp. bulgaricus and S. thermophilus, cultured alone, respectively; whereas the consociation of lactobacilli and streptococci with bifidobacteria reduced viability loss during storage (0.28 and 0.54log CFU/l for lactobacilli and streptococci, respectively). Finally, the consociation of lactobacilli and streptococci with B. bifidum improved their oxygen uptake.
Altieri
Clelia
C
Department of Food Science, Faculty of Agricultural Science, Foggia University, Via Napoli 25, 71100 Foggia, Italy.
Bevilacqua
Antonio
A
D'Amato
Daniela
D
Nobile
Matteo Alessandro Del
MA
Sinigaglia
Milena
M
D001644:Bifidobacterium / Q000254:growth & development*; D018920:Coculture Techniques; D015169:Colony Count, Microbial; D003470:Culture Media / Q000737:chemistry; D005511:Food Handling / Q000379:methods; D005516:Food Microbiology; D007700:Kinetics; D007778:Lactobacillus / Q000254:growth & development*; D008954:Models, Biological; D019936:Probiotics
D003470:Culture Media