EN
Samples of UTH milk containing 0.5, 2.0 i 3.2% of fat, and UHT cream containing 12.0 i 36.0% of fat were inoculated with 3 different strains of Listeria monocytogenes and heated in a water bath at 55°C, 60°C and 65°C for various time periods. In addition, the possibilities of the survival of Listeria monocytogenes in milk boiled under home conditions were checked. The range of D-values for Listeria monocytogenes was: at 55°C - from 12.12 to 29.06 min; at 60°C - from 1.16 to 1.48 min; at 65°C - from 0.14 to 0.24 min. Values of z ranged from 4.64 to 5.61°C. The fat of level practically did not affect the thermoresistance of Listeria monocytogenes. The obtained results suggest that the survival of Listeria monocytogenes in milk subjected to commercial pasteurization or in milk boiled under home conditions is impossible.