The combination 1 (St. thermophilus SP1.1 combined with Lb.
delbrueckii ssp. bulgaricus 3 4.5) could reach the final fermentation
in 4.5 h, which is much better than the low post acidification
commercial starter (which needs 5.5 h). In terms of yoghurt texture,
flavour and post acidification, the combination 1 is comparable
with the commercial starter and much cheaper than the imported
commercial starter culture. Therefore, the selected combination 1
could be used as a promising yoghurt starter culture to replace the
commercial starter culture and overcome post acidification in
yoghurt production