What are the six links in the chain of infection?

The six links in the chain of infection are designed to illustrate how infections can spread. The correct components include the causative agent, which is the pathogen that causes the disease; the reservoir, where the pathogen lives and multiplies; the portal of exit, which is the way the pathogen leaves the reservoir; the mode of transmission, the means by which the pathogen is transferred to another host; the portal of entry, which is how the pathogen enters the new host; and the susceptible host, who is at risk for infection.

This understanding is critical in infection control and prevention practices within healthcare settings. Recognizing these links helps healthcare professionals to identify points at which interventions can be applied to break the chain and stop the spread of infection.