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Parasitology Research

, Volume 86, Issue 6, pp 514–520 | Cite as

Vannella sp. harboring Microsporidia-like organisms isolated from the contact lens and inflamed eye of a female keratitis patient

  • Rolf Michel
  • Ernst N. Schmid
  • Thomas Böker
  • Dirk G. Hager
  • Karl-Dieter Müller
  • Ralf Hoffmann
  • Hanns Martin Seitz
ORIGINAL PAPER

Abstract

Viable Hartmannella sp. and two strains of Vannella sp. – but no Acanthamoebae– multiplied on NN-agar inoculated with pieces of the contact lens from a female keratitis patient. Within the cytoplasm of one Vannella isolate, intracellular parasites could be observed whose earliest stages were developing within the nucleus, resembling those Microsporidia-like parasites seen within Vannella isolated recently from a warm tapwater system. This assumption was also confirmed by electron microscopy. In swabs taken directly from the cornea, Pseudomonas aeruginosa were identified, but they did not yield any growth of amebas in culture. However, cocultivation of parasite-free Vannella strains with the above-mentioned swab matter resulted in infected amebas harboring the same intracellular parasites seen before. This infection could be established only if the corresponding spores were present as infective agents in the swab matter. The successful treatment of the patient with antibiotics supports the assumption that P. aeruginosa was the main cause of the corneal ulceration. The extent to which the Microsporidia-like organisms may have been involved in the development of keratitis remains a matter of discussion.

Keywords

Electron Microscopy Successful Treatment Pseudomonas Aeruginosa Contact Lens Keratitis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Rolf Michel
    • 1
  • Ernst N. Schmid
    • 2
  • Thomas Böker
    • 3
  • Dirk G. Hager
    • 3
  • Karl-Dieter Müller
    • 2
  • Ralf Hoffmann
    • 1
  • Hanns Martin Seitz
    • 4
  1. 1.Central Institute of the Bundeswehr Medical Service, Microbiology (Parasitology), P.O. Box 7340, 56065 Koblenz, Germany Fax: +49-261-8961306DE
  2. 2.GHS Essen, Institute for Medical Microbiology, Hufelandstraße 55, 45147 Essen, GermanyDE
  3. 3.Clinic for Ophthalmology, University of Bonn, Sigmund-Freud-Strasse 25, 53127 Bonn, GermanyDE
  4. 4.Institute of Medical Parasitology, University of Bonn, Sigmund-Freud-Strasse 25, 53127 Bonn, GermanyDE

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