Final answer:
Iatrogenic refers to diseases or responses resulting from medical treatments, such as a patient acquiring necrotizing fasciitis from contaminated bandages after a wound treatment. Nosocomial diseases are a type of iatrogenic disease acquired in hospital settings, often facilitated by weakened immune systems and drug-resistant bacteria.
Step-by-step explanation:
The term iatrogenic refers to unfavorable responses or diseases that are the result of medical or surgical treatment, caused by the treatment itself. An example of an iatrogenic disease is when an individual acquires necrotizing fasciitis due to contaminated dressings after being treated for a skin wound. In contrast, polypharmacy refers to the use of multiple medications by a patient, and senescence describes the process of aging. Hospital-acquired infections, also known as nosocomial diseases, are a type of iatrogenic disease, arising from pathogens present in healthcare settings that can be transmitted via various routes such as contaminated equipment or insufficient hand hygiene among healthcare providers. Moreover, patients in hospitals often have weakened immune systems, and the widespread use of antibiotics can lead to drug-resistant bacteria, increasing the challenge of treating these infections.