Food industries, especially dairy industries, have been quick to
realize the huge market potential created by the numerous positive
health benefits of these probiotic bacteria. Both Lactobacillus
spp. and Bifidobacterium spp. have been accorded the generally
recognized as safe status because of their long history of safe use
in foods (Salminen and others 1998). Among the various milk
products, yogurts are regarded as the ideal vector for the delivery
of these probiotic bacteria to consumers.