Which antibiotic should be prescribed for a bacterial keratitis infection?

In the case of bacterial keratitis, the primary treatment is the application of a topical antibiotic. This is essential because bacterial keratitis is caused by bacterial infection of the cornea, and topical antibiotics specifically target the bacteria responsible for the infection. They help to eliminate the pathogens and encourage recovery of the corneal tissue.

Topical antibiotics are preferred because they deliver the medication directly to the site of infection, ensuring higher concentrations of the drug are available where it is needed most. This method is typically effective in treating localized infections of the eye, such as keratitis.

Other options would not adequately address the bacterial nature of keratitis. Topical corticosteroids, for example, are sometimes used to reduce inflammation, but they can worsen bacterial infections if not used alongside antibiotics. Oral antibiotics are less effective for localized eye infections because they are not concentrated enough at the site of the infection. Antiviral ointments are specifically designed for viral infections and would not be effective against bacterial pathogens. Thus, the use of topical antibiotics is the most appropriate and effective choice for treating bacterial keratitis.