DESMUTAGENICITY OF MILK CULTURED WITH LACTOBACILLUS-ACIDOPHILUS STRAINS AGAINST MUTAGENIC HEATED TAUCO

Desmutagenicity of milk cultured with Lactobacillus acidophilus strain s on the mutagenicity of heated salty and sweet tauco were examined us ing streptomycin dependent (SD) 510 strain of Salmonella typhimurium T A98 as tester culture. Cultured milk samples widely exhibited desmutag enic effects against mutagenic heated salty and sweet tauco. Mutagenic ity of heated salty tauco was inhibited by acidophilus cultured milks stronger than that of heated sweet tauco. Milk cultured with strains S BT2054, SBT0299, SBT0274. SBT10238, SBT1702, SBT10240, SBT10241 and SB T10239 showed high inhibition against the mutagenicity of both heated salty and sweet taucos. Maximum inhibition was reached after 24 hr of incubation which corresponded to stationary growth phase. Desmutagenic activities of the acidophilus cultured milks against mutagenic heated tauco were mainly attributed to the bacterial cells and also to casei n of milk. (C) 1998 Elsevier Science Ltd. All rights reserved.