Abstract
Anatomically intact articular cartilage in form of sesamoid bones from metacarpophalangeal joints of 2-year-old cows was tested for its influence on the microbicidal effect of the iodophore Betaisodona ®, the bispyridinamine Octenisept ®, and the biguanide Lavasept ®. Comparisons were carried out in Ham's F12 medium with and without 0.2% bovine serum albumin as organic matter loading. The expected abolition of the microbicidal effect of these antiseptics against the test organisms Escherichia coli or Staphylococcus aureus in the presence of sesamoid bone was not evident. Furthermore, sesamoid bone alone demonstrated antibacterial activity against Staphylococcus aureus, which may involve adherence of bacteria to surface constituents of articular cartilage. Final concentrations of 2.5–5% Betaisodona ®, 5% Octenisept ® as well as 0.025% Lavasept ® are effective in killing of 10 8–10 9 cfu/ml Escherichia coli or Staphylococcus aureus in the presence of sesamoid bone without the reduction of antimicrobial activity expected from binding to CS, which has previously been demonstrated for CS in solution.
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