Two strains of Streptococcus thermophilus producing capsular and capsular-ropy exopolysaccharides (EPS) were cultivated in M17 medium supplemented with lactose at 37°C for 24 hours. At the end of fermentation, EPS were extracted and their flow behavior was assessed as a function of concentration, pH and temperature. Apparent viscosity of capsular EPS dispersions was higher than that of the capsular-ropy EPS, while activation energy was lower. A pH increase amplified activation energy in both types of EPS. Flow behavior of both EPS dispersions was fitted well by the Cross model, with capsular-ropy EPS showing greater zero shear rate viscosity, relaxation time and limiting slope. These parameters were greatly affected by the strain type, pH and temperature.