Metronidazole is clinically indicated for all of the following conditions except_____________?
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Answer: D. Streptococcal sore throat
Explanation
Metronidazole is specifically active against anaerobic bacteria and certain protozoal parasites. Streptococcal sore throats are typically caused by aerobic or facultative gram-positive streptococci. The lack of activity against aerobic streptococci renders this medication completely ineffective here. Antimicrobial stewardship dictates matching the drug spectrum to the causative pathogen. Anaerobic infections thrive in environments with low oxygen tension like periodontal pockets. Streptococcal pharyngitis requires agents such as penicillins or cephalosporins for eradication.
Incorrect antibiotic selection leads to treatment failure and promotes unnecessary antimicrobial resistance. Throat infections must be properly diagnosed before initiating targeted pharmacological treatment. Prescribing anaerobic coverage for aerobic infections wastes valuable healthcare resources. Ulcerative gingivitis involves anaerobic bacteria which respond favorably to metronidazole treatment. Amoebiasis is caused by protozoan parasites susceptible to nitroimidazole antimicrobial drugs. Trichomonas infections involve anaerobic protozoa effectively treated by systemic metronidazole courses.
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