American Journal of Ophthalmology Case Reports 2019-Dec
Oral miltefosine for refractory Acanthamoeba keratitis.
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Purpose
To report the first case of Acanthamoeba keratitis treated with oral miltefosine in the United States.Observations
A 17-year-old female with a history of orthokeratology contact lens wear presented after five months of left eye pain, redness, and photophobia. She was previously treated with antivirals and topical corticosteroids for presumed herpetic disease. She was found to have a large central ring infiltrate and corneal cultures were positive for Acanthamoeba. The infection progressed despite hourly PHMB 0.02% and chlorhexidine 0.02%, and oral vorizonazole. The patient was started on oral miltefosine 50 mg 3 times per day. Following one week of treatment, repeat cultures were positive for Acanthamoeba and therefore, the concentration of chlorhexidine was increased from 0.02% to 0.06% and PHMB was changed to propamidine isetionate (Brolene 0.1%). There was definite clinical improvement after five weeks of treatment with oral miltefosine, topical chlorhexidine 0.06% and propamidine isetionate 0.1%.Conclusions and importance
Acanthamoeba keratitis is a challenging entity to treat and often associated with a poor prognosis. Oral miltefosine may offer additional therapeutic benefit in cases of refractory Acanthamoeba keratitis.