Final answer:
A patient's staph infection acquired during an inpatient hospital stay is an example of a hospital-acquired infection, related to nosocomial diseases which are often caused by pathogens like MRSA that have developed resistance to antibiotics.
Step-by-step explanation:
A patient diagnosed with a staph infection acquired during his inpatient stay is an example of a hospital-acquired infection. These infections, also known as nosocomial infections, can occur after medical procedures if the site becomes contaminated. Factors such as the presence of pathogens brought by sick patients, improperly sterilized medical equipment, and many hospital patients having weakened immune systems contribute to the risk of these infections. Methicillin-resistant Staphylococcus aureus (MRSA) is a well-known pathogen associated with hospital-acquired infections, and infections by Staphylococcus aureus that used to be treatable with penicillin now include strains that are completely resistant due to the use of antibiotics selecting for drug-resistant bacteria.
Considering the types of infections associated with medical settings, the correct answer to the question is: a. hospital-acquired infection.