Commercial and Homemade Extremely Dilute Hypochlorous Acid Solutions Are Bactericidal Against Staphylococcus aureus and Escherichia coli In Vitro

A commercially available extremely low concentration of hypochlorous acid solution (HClO, 0.011%) sold over the counter for wound care in horses completely inhibits growth of Staphylococcus aureus and Escherichia coli in vitro when in solution. A homemade solution of equivalent concentration of hypochlorous acid (HClO, 0.012%) equally inhibits the two organisms tested, at a much lower cost. Such solutions may have wide potential applications in equine medicine.