Drug-resistant severe acanthamoeba keratitis caused by rare T5 acanthamoeba genotype

Alfonso Iovieno, Rafael A. Oechsler, Dolena R. Ledee, Darlene Miller, Eduardo C. Alfonso

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Objective: To describe a case of severe and drug-resistant Acanthamoeba keratitis in a contact lens wearer caused by atypical T5 Acanthamoeba genotype (Acanthamoeba lenticulata). Methods: Report of a case, Acanthamoeba DNA amplification and sequencing. Results: A 61-year-old patient was referred to our clinic with a 2-week history of keratitis. Acanthamoeba keratitis (AK) was diagnosed using confocal microscopy and corneal scraping culture. Using polymerase chain reaction (PCR) and DNA sequencing, the organism was classified as a T5 genotype (A.lenticulata). The keratitis continued to progress despite topical antiamoebic therapy and ultimately led to enucleation of the affected eye. Conclusions: T5 genotype Acanthamoeba can cause severe AK. Atypical Acanthamoeba genotypes could be associated with worse prognosis and resistance to therapy.

Original languageEnglish (US)
Pages (from-to)183-184
Number of pages2
JournalEye and Contact Lens
Issue number3
StatePublished - May 1 2010

ASJC Scopus subject areas

  • Ophthalmology


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