In recent years several researchers have studied the behavior of fluid
foods when US is applied, focusing on the effects of this technology
on microbial inactivation, physicochemical properties and bioactive
compounds of foods. Data on inactivation of food microorganisms by
US alone are scarce, because the effects of US are usually not severe
enough for a sufficient lethal effect. As a result, most researches on
this subject focus on the combination of US with other preservation
technologies as a candidate of the hurdle technology. According to the
current state of the art, none of the conducted studies achieved the
5-log reduction of contaminant pathogens in fruit juices. This fact indicates
that there is a need for deeper investigation onmicrobial inactivation
induced by US