Effect of combined ultrasonic and heat treatment (thermoultrasonication) on the survival of a strain of Staphylococcus aureus.
The combined effect of ultrasonic waves (20 kHz, 150 W) and heat treatment applied simultaneously (thermoultrasonication) on the survival of a strain of Staphylococcus aureus was studied in 0.05 M-phosphate buffer pH 6.8 and ultra-heat-treated whole milk. This combined process decreased by 63% the decimal reduction times for the heat treatment when the organism was suspended in buffer and by 43% when suspended in milk. These effects were much greater than the additive effect of the two agents considered independently.
D000818:Animals; D002417:Cattle; D005260:Female; D006358:Hot Temperature; D008892:Milk / Q000382:microbiology*; D013211:Staphylococcus aureus / Q000502:physiology*; D014465:Ultrasonics