The microstructure and texture of the four types of yoghurts
depended on the strain combination used and hence the EPS types
synthesized and on the intensity of post-fermentation mechanical
treatment. The results indicate that for the used strain combinations,
the choice of ST strain was the major determinant for the
rheological properties of the yoghurts produced, since one of the
strains used (CHCC-13140) produced a type of EPS that conferred a
ropy texture. However, yoghurts made with this strain also
exhibited decreased water holding properties and a more open
microstructure, possibly due to incompatibility between the EPS
present and the milk protein.