Antimicrobial resistance
Antimicrobial resistance ( 4 Questions)
A client with a wound infection caused by methicillin-resistant Staphylococcus aureus (MRSA) asks the nurse how the bacteria became resistant to methicillin.
The nurse should respond by saying:
Choice A is wrong because methicillin does not work by being broken down by an enzyme. Some other antibiotics, such as penicillin, can be inactivated by bacterial enzymes, but not methicillin.
The bacteria have an altered target site that methicillin cannot bind to. This means that the bacteria have changed their structure so that the antibiotic cannot attach to them and kill them.
Choice C is wrong because methicillin does not work by entering the bacterial cell. Some other antibiotics, such as tetracycline, can be expelled by bacterial membrane pumps, but not methicillin.
Choice D is wrong because methicillin does not work by blocking an alternative pathway. Some other antibiotics, such as sulfonamides, can be bypassed by bacterial alternative pathways, but not methicillin.
The bacteria have an altered target site that methicillin cannot bind to. This means that the bacteria have changed their structure so that the antibiotic cannot attach to them and kill them.
Choice A is wrong because methicillin does not work by being broken down by an enzyme. Some other antibiotics, such as penicillin, can be inactivated by bacterial enzymes, but not methicillin.
Choice C is wrong because methicillin does not work by entering the bacterial cell. Some other antibiotics, such as tetracycline, can be expelled by bacterial membrane pumps, but not methicillin.
Choice D is wrong because methicillin does not work by blocking an alternative pathway. Some other antibiotics, such as sulfonamides, can be bypassed by bacterial alternative pathways, but not methicillin.