Microbiological evaluation of commercial probiotic products available in Italy

L. Drago, E. De Vecchi, L. Nicola, A. Colombo, M. R. Gismondo

Research output: Contribution to journalArticlepeer-review


Scientific evidence of the prevention and therapy of some intestinal diseases is accumulating in regard to probiotic products. However, sufficient information on the use of probiotics in specific therapies is not yet available and, above all, there is no clear legislation about these products in Europe. In this study, we evaluated five different probiotic products commercially available in Italy for their qualitative and quantitative microbial content after about 12 and 22 months of storage. We also evaluated the stability of lactobacilli to 0.3% bile salts and to pH of 3.58 and 7.98. There were discrepancies between the declared content and our results found after storage for 4 of the tested products. Bile salts and basic pH did not affect the growth of the lactobacilli tested, while for 2 tested products 6 hours at acid pH produced a complete inhibition of bacterial growth. Our results suggest the need for clear legislation and adequate control of the manufacturing of probiotic products.

Original languageEnglish
Pages (from-to)463-467
Number of pages5
JournalJournal of Chemotherapy
Issue number5
Publication statusPublished - Oct 2004


  • Lactobacilli
  • Probiotics
  • Product stability

ASJC Scopus subject areas

  • Pharmacology (medical)
  • Microbiology (medical)


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