Save

Inhibitory activity in vitro of probiotic lactobacilli against oral Candida under different fermentation conditions

In: Beneficial Microbes
Authors:
Q. Jiang Institute of Dentistry, University of Helsinki, P.O. Box 41, 00014 Helsinki, Finland

Search for other papers by Q. Jiang in
Current site
Google Scholar
PubMed
Close
,
I. Stamatova

Search for other papers by I. Stamatova in
Current site
Google Scholar
PubMed
Close
,
K. Kari Institute of Dentistry, University of Helsinki, P.O. Box 41, 00014 Helsinki, Finland

Search for other papers by K. Kari in
Current site
Google Scholar
PubMed
Close
, and
J.H. Meurman

Search for other papers by J.H. Meurman in
Current site
Google Scholar
PubMed
Close
Download Citation Get Permissions

Access options

Get access to the full article by using one of the access options below.

Institutional Login

Log in with Open Athens, Shibboleth, or your institutional credentials

Login via Institution

Purchase

Buy instant access (PDF download and unlimited online access):

€36.93

Clinical studies have shown that probiotics positively affect oral health by decreasing gum bleeding and/or reducing salivary counts of certain oral pathogens. Our aim was to investigate the inhibitory effect of six probiotic lactobacilli against opportunistic oral Candida species. Sugar utilisation by both lactobacilli and Candida was also assessed. Agar overlay assay was utilised to study growth inhibition of Candida albicans, Candida glabrata and Candida krusei by Lactobacillus rhamnosus GG, Lactobacillus casei Shirota, Lactobacillus reuteri SD2112, Lactobacillus brevis CD2, Lactobacillus bulgaricus LB86 and L. bulgaricus LB Lact. The inhibitory effect was measured at pH 5.5, 6.4, and 7.2, respectively, and in the presence of five different carbohydrates in growth medium (glucose, fructose, lactose, sucrose, and sorbitol). Growth and final pH values were measured at two-hour time points to 24 h. L. rhamnosus GG showed the strongest inhibitory activity in fructose and glucose medium against C. albicans, followed by L. casei Shirota, L. reuteri SD2112 and L. brevis CD2. None of the lactobacilli tested affected the growth of C. krusei. Only L. rhamnosus GG produced slight inhibitory effect on C. glabrata. The lower pH values led to larger inhibition zones. Sugar fermentation profiles varied between the strains. L. casei Shirota grew in the presence of all sugars tested, whereas L. brevis CD2 could utilise only glucose and fructose. All Candida species metabolised the available sugars but the most rapid growth was observed with C. glabrata. The results suggest that commercially available probiotics differ in their inhibitory activity and carbohydrate utilisation; the above properties are modified by different pH values and sugars with more pronounced inhibition at lower pH.

Content Metrics

All Time Past 365 days Past 30 Days
Abstract Views 688 289 33
Full Text Views 45 27 1
PDF Views & Downloads 27 12 3