Assessment of the development of Staphylococcus aureus during the production of soro on a laboratory scale

The aim of this study was to evaluate the multiplication S. aureus during whey powder production in laboratory scale. Whey inoculated with 106 CFU∙ mL-1 mixed culture at beginning processing and persistence microorganism after pasteurization, vacuum evaporation drying evaluated. recontamination by biofilms also Population 102 CFU∙mL-1 found evaporation. able multiply concentrated crystallization lactose, which infers that it is possible form a biofilm stage. Confocal microscopy analysis confirmed presence adhered cells 4 h process (103 CFU∙cm2). After 12 incubation, number approximately 105 CFU∙cm2. Sessile stainless steel were return planktonic phase. spray drying, verified population 103 CFU∙g-1. results obtained scale points need quality assurance systems control steps industrial production.