iatrogenic cause
Causes. Iatrogenic infection is complex because it has so many causes, including chance, negligence, medical error, and interactions of prescription drugs. Nosocomial infections, another leading cause of iatrogenic illness, are those that occur during hospitalization or through treatment in another health care setting. Vectors for infection in these facilities include vomit, blood, urine, and feces. Some microorganisms can be spread through the air.