Removal of microcystin-LR by strains of metabolically active probiotic bacteria

Sonja M.K. Nybom*, Seppo J. Salminen, Jussi A.O. Meriluoto

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

64 Citations (Scopus)


The ability of specific strains of probiotic bacteria to remove the cyanobacterial peptide toxin microcystin-LR from aqueous solutions was assessed. Lactobacillus rhamnosus strains GG and LC-705, Bifidobacterium longum 46, Bifidobacterium lactis 420 and Bifidobacterium lactis Bb12 were shown to be the most effective in toxin removal among 11 tested strains. The highest removal percentage of microcystin-LR was 58.1%, observed with B. lactis Bb12 (toxin concentration 100 μg L-1, 1010 CFU mL-1, 37°C, 24 h). Freshly cultured bacteria were shown to be more efficient in microcystin removal than lyophilized or nonviable bacteria. Removal of microcystin-LR was shown to be dependent on both temperature and bacterial concentration. It is concluded that some of the tested strains have good potential in removing microcystins from aqueous solutions.

Original languageEnglish
Pages (from-to)27-33
Number of pages7
JournalFEMS Microbiology Letters
Issue number1
Publication statusPublished - May 2007
MoE publication typeA1 Journal article-refereed


  • Bifidobacterium
  • Cyanotoxin
  • Degradation
  • Lactobacillus
  • Microcystin-LR
  • Probiotic bacteria


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