BEHAVIOUR OF LACTOBACILLUS ACIDOPHILUS IN RECONSTITUTED SKIM MILK WITH DIFFERENT SOLID CONTENTS

Document Type : Original Article

Authors

Animal Production Research Institute, Agricultural Research Centre, Giza, Egypt.

Abstract

Acidophilus milk was amde from reconstituted skim milk contan­ing different concentrations of solids not fat (10, 20 and 30%), heat treated at 90-95°C/30 min, cooled to 37°C, inoculated with 3% Lacto­bacilus acidophilus culture and incubated at 37°C until coagulation. Sam­ples were drawn when frsh and every 2h to determine titratable acidity, pH value and lactose content and examined bacteriologically for total vi­able, L. acidophilus and sporeformers counts. Results revealed that rais­ing the milk solids not fat up to 20% was found to have an increasingly stimulating effect on the behaviour of L. acidophilus during fermentation, while, the use of higher levels had lesser effect.