Acta Parasitologica

, Volume 63, Issue 2, pp 428–432 | Cite as

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

  • Laura Fuhrich Fabres
  • Vinicius José Maschio
  • Denise Leal dos Santos
  • Sergio Kwitko
  • Diane Ruschel Marinho
  • Bruno Schneider de Araújo
  • Claudete Inês Locatelli
  • Marilise Brittes RottaEmail author


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.


Free-living amoebae Acanthamoeba keratitis contact lenses 


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Copyright information

© Witold Stefański Institute of Parasitology, Polish Academy of Sciences 2018

Authors and Affiliations

  • Laura Fuhrich Fabres
    • 1
  • Vinicius José Maschio
    • 1
  • Denise Leal dos Santos
    • 1
  • Sergio Kwitko
    • 2
  • Diane Ruschel Marinho
    • 2
  • Bruno Schneider de Araújo
    • 2
  • Claudete Inês Locatelli
    • 2
  • Marilise Brittes Rotta
    • 1
    Email author
  1. 1.Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Division of ParasitologyUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
  2. 2.Cornea Division, Department of OphthalmologyHospital de Clínicas de Porto Alegre, Rio Grande do SulPorto AlegreBrazil

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