A quality S.cerevisiae strain Y102 was screened from late natural fermentation process of skin and residues of V.davidii.The vaccine OD value was measured by nephelometry at wave length of 560 nm to determine its cell concentration.The effects of pH value,temperature and rotating speed on the growth of Y102 strain was studied.Its optimum growth conditions were determined by L9（33）orthogonal experiments as follows： pH value=5.0,temperat...
