What is the most common microorganism responsible for catheter-related infections?

Staphylococcus aureus is well-known as the most common microorganism implicated in catheter-related infections. This gram-positive bacterium is part of the normal flora of the skin and can easily enter the bloodstream through intravascular devices such as central catheters. Its ability to form biofilms on the surfaces of catheters significantly contributes to its pathogenicity, making it difficult to eliminate once an infection has established.

In research and clinical studies, Staphylococcus aureus has been repeatedly identified as a frequent isolate in bloodstream infections associated with catheter use, further solidifying its reputation in this context. Effective infection control measures, including proper insertion techniques and maintenance protocols, are crucial for reducing the risk of infections caused by this organism in patients with vascular access devices.

The other microorganisms listed have varying associations with catheter-related infections but are not as prevalent as Staphylococcus aureus in this specific context. For example, while Escherichia coli is notable for urinary catheter infections, it does not match the prevalence seen with Staphylococcus aureus in the context of vascular access.