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OBJECTIVE: To determine the presence of Acanthamoeba genus in symptomatic persons. SETTING: Cayetano Heredia National Hospital Ophthalmology Service. MATERIAL AND METHODS: One hundred individuals without evidence of corneal lesion had corneal samples examined during April and May 1999. Samples were sowed in neapolitan agar and non-nutritive agar, incubated and checked after 7 days. RESULTS: Acanthamoeba cysts were found in 16 out of the 100 samples; 44 subjects were male; diagnosis was not different in both sexes; 63% of individuals were below 20 year-old; infection was predominant in younger people; 89% referred visits to areas where the parasite had been reported (Piura, Ica); 58 subjects referred swimming in pools or rivers. Out of 76 subjects who reported daily use water source, 63% obtained it from water-tank cars and 25% from wells; infection was more frequent in the latter ones (31,6% vs. 12,5%). Acanthamoeba coincided with amethropy (44%), conjunctivitis (16,4%) and blepharitis (12,3%). CONCLUSION: The parasite Acanthamoeba is present in young people without corneal lesion in whom risk to develop keratitis has to be considered.

Aislamiento de Acanthamoeba en pacientes del Servicio de Oftalmología del Hospital Nacional Cayetano Heredia