The cell morphology of Lactobacillus is diverse, and it usually grows in a chain arrangement of short rods, long rods and clubs. Under the microscope, it was observed that most of the lactobacilli had no movement, only a few with flagella all over the body moved, and it had no spores, and the Gram stain was positive. It has harsh growth conditions and must provide amino acids, salts, fatty acids and fermentable carbohydrates to grow. Common Lactobacillus genera are: Lactobacillus, Kinetobacter, Eubacteria, Pseudomycobacterium and Streptobacter. "According to the different genus fermentation products, it can be divided into (1) Homo-type lactic acid fermentation Lactobacillus. (2) Facultative heterotypic lactic acid fermentation Lactobacillus. (3) Obligate heterotypic lactic acid fermentation Lactobacillus
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