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Updated: Aug 6, 2026

Multi-Locus Sequencing for Strain Typing of Toxoplasma gondii
Published on: May 26, 2026
Stylonychia lemnae strains from a North American site differ in a single nucleotide within the small subunit rDNA
Stephanie L Schmidt1, Dieter Ammermann, Martin Schlegel
1Department of Molecular Evolution and Animal Systematics, University of Leipzig, Leipzig 04103, Germany. sschmidt@rz.uni-leipzig.de
Abstract:
Stylonychia lemnae (Ciliophora, Spirotrichea), a member of the Stylonychia mytilus complex, shows a global distribution, occurring in many temperate fresh waters. As there are few descriptions of biogeographical patterns of ubiquitously occurring ciliated protozoans, we report a distinct sequence difference within the small subunit ribosomal DNA gene, which occurs only in the clones of S. lemnae isolated from the surroundings of Ithaca (USA) in comparison with clones of the same species from different regions in Europe, Asia, and South Africa.
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