Choice A rationale:
Utilizing a respirator when handling urine output is not the most appropriate action for a nurse caring for a patient with MRSA.
MRSA is not typically transmitted through the air, but rather through direct contact with infected wounds or contaminated surfaces.
While a respirator may offer some protection against airborne particles, it is not necessary for routine care of a patient with MRSA.
It is more important to focus on hand hygiene and other infection control measures.
Choice B rationale:
Restricting visitors strictly to immediate family members only is not necessary for a patient with MRSA.
While it is important to limit the number of visitors to reduce the risk of spreading infection, there is no need to restrict visitors to immediate family members only.
Visitors should be instructed on proper hand hygiene and other infection control measures, and they should avoid contact with the patient's wounds or dressings.
Choice C rationale:
Washing hands only after removing gloves post-care is not sufficient for preventing the spread of MRSA. It is important to wash hands before and after any contact with the patient, even when wearing gloves.
This is because gloves can become contaminated with bacteria, and hand washing helps to remove any bacteria that may have gotten on the hands.
Choice D rationale:
Preparing to administer vancomycin is the most appropriate action for a nurse caring for a patient with MRSA. Vancomycin is an antibiotic that is effective against MRSA.
It is often used to treat MRSA infections, and it can help to prevent the infection from spreading.

Choice A rationale:
Plague is a highly contagious and often fatal disease caused by the bacterium Yersinia pestis. It is transmitted to humans through the bites of infected fleas or by direct contact with infected animals or their tissues.
Plague can cause severe illness and death, even with prompt treatment. The mortality rate for untreated plague is 50-60%. Therefore, it is incorrect to state that plague produces a mild illness and generally has a low mortality rate.
Choice C rationale:
Smallpox is a highly contagious and deadly disease caused by the variola virus. It was eradicated in 1980, but there is still a risk that it could be used as a bioweapon.
Most people under the age of 40 have not been vaccinated against smallpox and therefore have no immunity to the disease. Therefore, it is incorrect to state that the majority of Americans have adequate innate immunity to smallpox.
Choice D rationale:
Safer food preparation practices have helped to decrease the incidence of foodborne illnesses.
However, foodborne illnesses can still be spread through international travel. Travelers can be exposed to contaminated food or water in other countries.

Therefore, safer food preparation practices do not eliminate the risk of foodborne illnesses being spread through international travel.