The invention relates to a disinfectant composition (i) comprising a combination of citric acid or a physiologically acceptable salt thereof as component (A), and poly(hexamethylene-biguanide) (PHMB) or a physiologically acceptable salt thereof as component (B) and/or (ii) exhibiting a log reduction of staphylococcus aureus of at least 4.0 after a contact time of 5 minutes according to DIN EN 13727 and/or a growth inhibition of Candida and/or S. aureus and the use of said composition for the prevention and/or reduction and/or elimination and/or eradication of microbial contaminations in health care products.