Question

Antibiotic X is made naturally by the bacterium Bacillus subtilis and is primarily only used to target skin infections caused by a select number of Gram positive bacteria. This type of chemotherapeutic drug would best be characterized as a(n):

Answer 1

Chemotherapeutic drug would best be characterized as a Narrow-spectrum antibiotic.

What is a narrow spectrum antibiotic?

A limited number of bacterial species can be killed or inhibited by a narrow-spectrum antibiotic. Fidaxomicin and sarecycline are two examples of narrow-spectrum antibiotics. Narrow spectrum antibiotics are active against a selected group of bacterial types. They can act on either gram +ve or gram –ve but not both.

Only undesirable bacteria species may be killed or inhibited by a narrow-spectrum antibiotic (i.e. causing disease). As a result, it largely ignores the beneficial bacteria, reducing any unintended consequences on the microbiota. Low likelihood of bacterial resistance emerging.

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