Determination of Lactic Acid Production and Antagonistic Activity against Helicobacter pylori of L. delbrueckii subsp bulgaricus and S. thermophilus Strains

Aslım B., Onbasili D., Yüksekdağ Z.

KAFKAS UNIVERSITESI VETERINER FAKULTESI DERGISI, cilt.17, ss.609-614, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 17
  • Basım Tarihi: 2011
  • Dergi Adı: KAFKAS UNIVERSITESI VETERINER FAKULTESI DERGISI
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.609-614
  • Gazi Üniversitesi Adresli: Evet

Özet

In this study, lactic acid production was determined of a total of 32 strains of lactobacilli and streptococci. Different amounts of lactic acid were produced by strains studies; however, lactic acid levels were 13.4 to 18.6 mg/mL for Lactobacillus delbrueckii subsp. bulgaricus strains and 0.6 to 11.5 mg/mL for Streptococcus thermophilus strains. Antimicrobial activity was tested against Helicobacter pylori ATCC 43504. The some strains were able to inhibit H. pylori. Bacteriocin-like substances (BLS) producing strains were determined under conditions eliminating the effects of organic acids. As a result, it was observed that inhibitory activities of only ten strains were due to bacteriocin-like substances.