Question

An antibiotic that disrupts the normal microflora of a person:

Uasually has multiple modes of action

Is usually not subject to the development of resistance

Can lead to an overgrowth of antibiotic resistant microbes

None listed

Must be a narrow spectrum antibiotic

Answer 1

The answer will be can lead to an overgrowth of antibiotic resistant microbes (Third option).

Explanation: Antibiotic that disrupts the normal microflora of a person is most probably a broad-spectrum antibiotic. Because only a broad-spectrum antibiotic can kill wide range of microbes & disrupt the normal microflora whereas narrow spectrum antibiotic selectively kills some specific microorganism & will not disrupt the normal microflora. So, we can ignore last option. Broad spectrum antibiotic is generally subject to development resistance, as a single antibiotic resistant bacterium can overgrow (Due to the fact that as other microbes are already eliminated, there is plentiful nutrients to thrive) & can lead to a secondary infection. So, we can ignore second option. Thus, correct answer will be third option.