乳酸菌是一类能在可利用的碳水化合物发酵过程中产生大量乳酸的细菌[1]。目前,在自然界已发现至少43个属的这类菌[1]。近年来,随着乳酸菌益生作用的相继发现,乳酸菌制品的生产及销售量也逐年呈上升趋势,正因如此,对乳酸菌进行正确的鉴定已成为乳酸菌产业中的重要内容之一。乳酸 Lactobacilli are a class of bacteria that produce large amounts of lactic acid during the available carbohydrate fermentation [1]. At present, at least 43 genera of these genera have been found in nature [1]. In recent years, along with the discovery of the probiotic effects of lactic acid bacteria, the production and sales of lactic acid bacteria products have also been on the rise year by year. For this reason, the correct identification of lactic acid bacteria has become an important part of the lactic acid bacteria industry. Lactic acid