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Acta Parasitologica

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Volume 63, Issue 2

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Virulent T4 Acanthamoeba causing keratitis in a patient after swimming while wearing contact lenses in Southern Brazil

Laura Fuhrich Fabres
  • Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Division of Parasitology, Universidade Federal do Rio Grande do Sul, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande do Sul, 90050-170, Brazil
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/ Vinicius José Maschio
  • Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Division of Parasitology, Universidade Federal do Rio Grande do Sul, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande do Sul, 90050-170, Brazil
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/ Denise Leal dos Santos
  • Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Division of Parasitology, Universidade Federal do Rio Grande do Sul, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande do Sul, 90050-170, Brazil
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/ Sergio Kwitko
  • Cornea Division, Department of Ophthalmology, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande do Sul, 90035-903, Brazil
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/ Diane Ruschel Marinho
  • Cornea Division, Department of Ophthalmology, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande do Sul, 90035-903, Brazil
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/ Bruno Schneider de Araújo
  • Cornea Division, Department of Ophthalmology, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande do Sul, 90035-903, Brazil
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/ Claudete Inês Locatelli
  • Cornea Division, Department of Ophthalmology, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande do Sul, 90035-903, Brazil
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/ Marilise Brittes Rott
  • Corresponding author
  • Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Division of Parasitology, Universidade Federal do Rio Grande do Sul, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande do Sul, 90050-170, Brazil
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Published Online: 2018-04-13 | DOI: https://doi.org/10.1515/ap-2018-0050

Abstract

Several strains of free-living amoebae belonging to the genus Acanthamoeba can cause a painful sight-threatening disease of the cornea known as Acanthamoeba keratitis (AK). The numbers of AK cases keep rising worldwide mainly due to an increase in contact lens wearers and lack of hygiene in the maintenance of contact lenses and their cases. We report a case of AK in a healthy young woman admitted to the Hospital de Clinicas in Porto Alegre, southern Brazil. Corneal scrapings were examined for the presence of Acanthamoeba strains. The initial isolate was characterized by morphological and genotypic properties. The isolate belonged to group III according to Pussard and Pons’ cyst morphology. Analysis of its 18S rDNA sequence identified the isolate as genotype T4. The T4 genotype is the most commonly reported among keratitis isolates and the most common in environmental samples.

Keywords: Free-living amoebae; Acanthamoeba; keratitis; contact lenses

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About the article

Received: 2017-08-23

Revised: 2017-12-18

Accepted: 2018-01-09

Published Online: 2018-04-13

Published in Print: 2018-06-26


Citation Information: Acta Parasitologica, Volume 63, Issue 2, Pages 428–432, ISSN (Online) 1896-1851, ISSN (Print) 1230-2821, DOI: https://doi.org/10.1515/ap-2018-0050.

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