Parasitology Research

, Volume 110, Issue 5, pp 1881–1892 | Cite as

Morphological features of the nasal blood fluke Trichobilharzia regenti (Schistosomatidae, Digenea) from naturally infected hosts

  • Karl SkírnissonEmail author
  • Libuse Kolářová
  • Petr Horák
  • Hubert Ferté
  • Damien Jouet
Original Paper


The first author detected the nasal bird schistosome Trichobilharzia regenti in Iceland in Anas platyrhynchos in Landmannalaugar in autumn of 2003. Since then, measurements and morphological studies have been performed on fresh worms (fragments) obtained in the area from naturally infected ducks, A. platyrhynchos and Aythya marila. In the present study, we compare our findings to the original description of T. regenti by Horák et al. (Parasite 5:349–357, 1998) that relies upon worms obtained by experimental infections of A. platyrhynchos f. domestica and Cairina moschata f. domestica ducklings. Fragments obtained from naturally infected birds are markedly larger than those obtained in the experimental infection. Also, indistinct sex-related size difference was confirmed; males were more abundant in the material than females. Previously unknown morphological features detected in the present study include, e.g. subterminal spines on the oral sucker directed to the oral opening, spine pattern on the apical part of acetabulum and long tegumental spines (up to 16 μm) in the gonad and tail regions of both sexes. In males, we evaluated for the first time the morphology of the cirrus sac enclosing ejaculatory duct, prostata and the entire prostatic region, the course of vas deferens and the position of genital papilla. In females, the posterior part of the reproductive system was studied for the first time. The presence of the Laurer’s canal was confirmed and its course from the oviduct to the surface, where spermatozoa were noticed to leave the canal, was described.


Oral Sucker Infected Bird Mute Swan Bird Schistosome Tegumental Spine 
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.



In Iceland, the authors would like to thank Broddi Hilmarsson, Freyr Björnsson, Guðmundur Tryggvi Ólafsson and Þorvaldur Björnsson for bird sampling. Kirill V. Galaktionov is thanked for valuable comments on digenean morphology and evolution. Financial support was provided by the Research Fund of the University of Iceland and the Jules Verne Program for French–Icelandic scientific cooperation. The work of PH was supported by the Ministry of Education of the Czech Republic (grant nos. MSM 0021620828 and MSM LC06009) and the Czech Science Foundation (grant no. 206/09/H026).


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Karl Skírnisson
    • 1
    Email author
  • Libuse Kolářová
    • 2
  • Petr Horák
    • 3
  • Hubert Ferté
    • 4
  • Damien Jouet
    • 4
  1. 1.Laboratory of Parasitology, Institute for Experimental PathologyUniversity of IcelandReykjavíkIceland
  2. 2.Institute of Immunology and Microbiology of the First Faculty of MedicineCharles University in Prague and General Teaching HospitalPrague 2Czech Republic
  3. 3.Department of Parasitology, Faculty of ScienceCharles University in PraguePrague 2Czech Republic
  4. 4.JE 2533–USC Anses “VECPAR”, UFR de PharmacieUniversité de Reims Champagne–ArdenneReimsFrance

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