Which of the following is the goal of monitoring peak and trough levels during antibacterial therapy?

A. Ototoxicity:

Ototoxicity refers to damage to the auditory and vestibular nerves, leading to hearing loss and balance disturbances. Gentamicin, being an aminoglycoside antibiotic, is known for its potential to cause ototoxicity. Signs and symptoms of ototoxicity include changes in hearing, ringing in the ears (tinnitus), and imbalance. Ototoxicity is irreversible and can occur suddenly or gradually during gentamicin therapy. Therefore, any signs or symptoms of ototoxicity should be reported immediately to the physician for further evaluation and management.

B. Nausea:

Nausea is a common gastrointestinal side effect associated with gentamicin therapy. While it can be bothersome to the patient, nausea alone is not typically considered a severe adverse effect that requires immediate reporting to the physician. However, if nausea is severe or persistent and leads to dehydration or electrolyte imbalances, it should be addressed promptly.

C. Constipation:

Constipation is another potential gastrointestinal side effect of gentamicin therapy. Like nausea, constipation alone is not typically considered a severe adverse effect that requires immediate reporting to the physician. However, if constipation is severe or persistent and leads to discomfort or bowel obstruction, it should be addressed promptly.

D. Increased urinary output:

Increased urinary output may indicate improved renal function, which can be a desired effect during gentamicin therapy. Gentamicin is primarily excreted by the kidneys, and increased urinary output may help in the elimination of the drug from the body. Therefore, increased urinary output alone is not typically considered an adverse effect that requires immediate reporting to the physician. However, if there are signs of dehydration or electrolyte imbalances associated with increased urinary output, they should be addressed promptly.

A. An infection that is difficult to treat:

This choice describes a challenging infection but does not specifically capture the concept of a superinfection. While superinfections can indeed be difficult to treat, they are defined more specifically as secondary infections that occur due to disruption of the normal microbial flora during the treatment of an initial infection.

B. An infection caused by a weakened immune system:

This choice describes an infection that occurs due to a compromised or weakened immune system, which can indeed increase the risk of developing infections, including superinfections. However, it does not fully encompass the definition of a superinfection, which specifically involves the overgrowth of opportunistic pathogens after the disruption of normal microbial flora by antimicrobial treatment.

C. A secondary infection that occurs when microorganisms normally present in the body are killed by the drug:

This choice accurately describes what a superinfection is. It highlights the key concept that a superinfection is a secondary infection that arises when antimicrobial treatment disrupts or kills the normal microbial flora of the body, allowing opportunistic pathogens to overgrow and cause infection.

D. A drug-resistant infection:

This choice describes an infection caused by microorganisms that are resistant to the effects of antimicrobial drugs. While drug resistance is a significant concern in healthcare, it does not specifically define a superinfection. Superinfections can involve drug-resistant microorganisms, but they are not solely characterized by drug resistance; rather, they are secondary infections resulting from the disruption of normal microbial flora during antimicrobial treatment.