Which statement about antibiotic preparations for corneal ulcers is true?

Which statement about antibiotic preparations for corneal ulcers is true?

• A. Fortified antibiotics can be used
• B. Antibiotics should always be diluted to one-quarter strength
• C. Antibiotics should never be combined with atropine
• D. Antibiotics alone are sufficient without other therapies

Answer: (A)

The key idea is that treating bacterial corneal ulcers in horses often requires high concentrations of antibiotic at the site of infection to overcome rapid tear film turnover and reach the deeper layers of the cornea. Fortified antibiotic preparations do exactly this by increasing the drug concentration beyond standard topical formulations, which improves the chance of rapid bacterial killing in severe or deep ulcers. They’re prepared by compounding higher-strength solutions, such as fortified tobramycin and fortified cefazolin, and are used especially when urgency and depth of infection demand stronger local therapy. That’s why fortified antibiotics being used is the true statement. It reflects a real, widely practiced approach to maximize therapeutic effect when standard drops might not be sufficient. In contrast, diluting antibiotics to a fixed quarter-strength isn’t a universal rule or requirement; the choice to fortify typically aims to increase, not decrease, potency. Combining antibiotics with atropine is common in practice for pain relief and to minimize reflex spasm and synechiae, so the idea that they should never be used together isn’t accurate. Finally, antibiotics alone are rarely enough—management usually includes pain control with cycloplegics, lubricants, possible debridement, and treatment tailored to the underlying cause or co-infections, along with close monitoring for signs of progression.

The key idea is that treating bacterial corneal ulcers in horses often requires high concentrations of antibiotic at the site of infection to overcome rapid tear film turnover and reach the deeper layers of the cornea. Fortified antibiotic preparations do exactly this by increasing the drug concentration beyond standard topical formulations, which improves the chance of rapid bacterial killing in severe or deep ulcers. They’re prepared by compounding higher-strength solutions, such as fortified tobramycin and fortified cefazolin, and are used especially when urgency and depth of infection demand stronger local therapy.

That’s why fortified antibiotics being used is the true statement. It reflects a real, widely practiced approach to maximize therapeutic effect when standard drops might not be sufficient.

In contrast, diluting antibiotics to a fixed quarter-strength isn’t a universal rule or requirement; the choice to fortify typically aims to increase, not decrease, potency. Combining antibiotics with atropine is common in practice for pain relief and to minimize reflex spasm and synechiae, so the idea that they should never be used together isn’t accurate. Finally, antibiotics alone are rarely enough—management usually includes pain control with cycloplegics, lubricants, possible debridement, and treatment tailored to the underlying cause or co-infections, along with close monitoring for signs of progression.