This study was carried out to assess whether the use of yogurt prepared with the strain of the probiotic Streptococcus salivarius BIO5, could interfere in any way in the oral microbiota of students. Sixty students aged between 4 and 14 years were selected, who took the yogurt three times a week, for a period of 90 days. Student’s saliva was collected to check for presence and quantify the following microorganisms: staphylococci, total streptococci, mutans streptococci, lactobacilli, pseudomonas, yeasts, anaerobes and enterobacteria. The results showed that after 90 days of using yogurt, there was a decrease in microorganisms that are not part of the oral microbiota and there was no change in microorganisms considered to be residents.
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