The application of magnetic particle for DNA isolation from selekted probiotic products for children

In the food industry, it is important to correctly identify the species of bacteria and thier properties so that they can be used as a probiotic in dietary supplements. This is performed using DNA diagnostics. In the experimental part, the DNA from four probiotic dietary supplements for children was isolated. Magnetic particles P(HEMA-co-GMA) were tested for isolation. Isolated DNA was amplified by PCR and the presence of DNA of genus Lactobacillus, Bifidobacterium and Bacillus was demonstrated in the products according to the data declared by the manufacturer. The presence of species L.acidophilus, B.animalis in accordance with the data on the product has been demonstrated by PCR with species specific primers. Using PCR, the presence of L.casei, which was declared by the manufacturer, has not been proven in one product at given experimental conditions