In what scenario might a resident experience a secondary infection due to antibiotic therapy?

A resident might experience a secondary infection due to antibiotic therapy because antibiotics can disrupt the natural balance of flora in the body. Antibiotics are designed to kill or inhibit the growth of bacteria causing an infection, but they can also affect beneficial bacteria that normally help keep pathogens in check. When these beneficial bacteria are reduced or eliminated, it can open the door for opportunistic infections, such as yeast infections or Clostridium difficile associated diarrhea, to occur.

This disruption in the microbiome means that while the antibiotic treats the initial infection, it can inadvertently lead to the development of new infections from pathogens that would normally be kept in control by healthy bacterial populations. Therefore, the correct answer reflects a well-documented consequence of antibiotic use, which is an important consideration in medication administration and patient monitoring.