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.
Department of Food Science, Faculty of Agricultural Science, Foggia University, Via Napoli 25, 71100 Foggia, Italy.
Clelia
C
Altieri
Antonio
A
Bevilacqua
Daniela
D
D'Amato
Matteo Alessandro Del
MA
Nobile
Milena
M
Sinigaglia
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