In modern-day medicine, the use of central venous catheters has become unavoidable. However, their use does not come without risk. It puts patients in danger of infectious complications (catheter-related infections [CRI]), the most important of which is catheter-related bloodstream infection (CRBSI). CRBSI is associated with a significant increase in hospital stay and, therefore, cost of patient management, morbidity, and probably also mortality. There still is an urgent need for effective, cheap and easy to implement measures to prevent CRI that are without risk of developing antibiotic resistance.