Which of the following anti-infectives is a fluoroquinolone?

A. Using the same antibiotic for every infection can promote resistance, as it does not consider the specific pathogens or susceptibility patterns.

B. Prescribing antibiotics for every suspected infection can lead to overuse and unnecessary exposure to antibiotics, increasing the risk of resistance.

C. Encouraging self-medication with antibiotics can result in inappropriate usage and contribute to the development of resistant bacteria.

D. Educating healthcare providers and patients about appropriate antibiotic use is crucial in minimizing antibiotic resistance. This education helps ensure that antibiotics are prescribed only when necessary and used correctly, which can reduce the development of resistant strains of bacteria.

Rationale:

A. This option is incorrect because complete elimination of all microorganisms is not typically achievable or desirable, as some microorganisms are beneficial.

B. While this statement is partially correct, it does not fully encompass the definition of selective toxicity, which emphasizes the balance of efficacy and safety.

C. Selective toxicity refers to the ability of an anti-infective to kill or inhibit the growth of microorganisms without causing harm to the host. This principle is fundamental in developing effective antimicrobial agents that target pathogens while minimizing toxicity to human cells.

D. This option implies a focus on targeting specific microorganisms, which is related but not the complete definition of selective toxicity, as it also involves not harming the host.