What pathogens are most frequently associated with HAIs?

The most frequently associated pathogens with healthcare-associated infections (HAIs) include bacteria, particularly Staphylococcus aureus. This bacterium is known for causing a variety of infections in healthcare settings, including surgical site infections, bloodstream infections, and pneumonia. Its prevalence in hospitals can be attributed to factors such as increased patient exposure to invasive procedures, the presence of antibiotic-resistant strains, and a weakened patient population that is more susceptible to infection.

In contrast, while viruses like influenza and fungi like Candida can cause infections in healthcare environments, they are not as commonly associated with HAIs as certain bacterial pathogens. Protozoa, although they can be present in contaminated water, are less frequently linked to HAIs when compared to bacteria. Thus, it is the bacterial pathogens, particularly Staphylococcus aureus, that play a dominant role in the landscape of healthcare-associated infections.