Arhel`s lactoferrin proved to have one of the highest antimicrobial activity

Institute of dairy science & probiotics tested the antimicrobial activity of lactoferrin produced by ARHEL in comparison with three commercial products on the market.

Antimicrobial activity of lactoferrin samples obtained on a pilot plant at Arhel (10 samples) or purchased (3 producers) against Escherichia coli O157: H8 tox- was tested by microdilution method. The growth was followed by measuring the optical density at λ = 630 nm after 6-hour incubation at 37 °C. The figure shows inhibition of the growth of indicator bacteria due to the presence of lactoferrin, proportional to its increasing concentration. The inhibitory effect, which can also be expressed as MIC (minimal inhibitory concentration), was more pronounced in the samples of the Arhel than in three samples of other manufacturers, suggesting a higher biological (antimicrobial) activity of lactoferrin produced on Arhel. The MIC breakpoint was set at OD630 = 0.1, which means that the MIC is the lowest concentration sufficient to reduce the growth below OD630.