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Parasitology Research

, Volume 117, Issue 11, pp 3663–3667 | Cite as

Morphological and genetic characterisation of Sarcocystis halieti from the great cormorant (Phalacrocorax carbo)

  • Petras Prakas
  • Dalius Butkauskas
  • Saulius Švažas
  • Vitas Stanevičius
Short Communication
  • 34 Downloads

Abstract

Having examined 19 great cormorants (Phalacrocorax carbo) hunted in Lithuania, sarcocysts were found in the muscles of two birds. Sarcocysts detected were examined using light microscopy (LM), transmission electron microscopy (TEM), and 18S rDNA, 28S rDNA, ITS1, cox1, and rpoB sequence comparison. Based on the molecular analysis, mainly of the ITS1 region, sarcocysts were identified as Sarcocystis halieti. This is the first Sarcocystis species characterised in the great cormorant. Under the LM sarcocysts were ribbon-shaped, very long and thin (the largest fragment found amounted to 6.5 × 0.1 mm) with a smooth and thin (up to 1.2 μm) cyst wall. Banana-shaped bradyzoites were 7.2 × 1.9 (6.3–8.2 × 1.4–2.4) μm. Under TEM, the cyst wall was wavy, 0.8- to 1.2-μm thick. The comparison of 12 species demonstrated cox1 and rpoB to be unsuitable for the identification of Sarcocystis spp. using birds as intermediate hosts.

Keywords

Sarcocystis halieti Great cormorant Transmission electron microscopy rRNA ITS1 cox1 rpoB 

Notes

Acknowledgements

The authors are grateful to Liuda Kutkienė for her valuable comments on the draft of the paper. We are grateful for valuable comments and suggestions of reviewers, significantly contributing to the improvement of our manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Nature Research CentreVilniusLithuania

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