Final answer:
A nosocomial disease is an infection acquired in the hospital, while an iatrogenic disease is the result of a medical procedure.
Step-by-step explanation:
A nosocomial disease is an infection acquired while a patient is staying in the hospital. It is caused by pathogens that are introduced to the patient's bloodstream via contaminated equipment, procedures, wounds, or catheters. One example is puerperal sepsis, a type of nosocomial infection that occurs in the genital tract, breast, urinary tract, or a surgical wound after childbirth. These diseases are different from iatrogenic diseases, which are the direct result of a medical procedure.