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Diagnosis | Cyniclomyces guttulatus yeast

Lab Animal volume 37, pages 348–349 (2008)Cite this article

The unicellular organisms on the slide are the non-pathogenic yeast Cyniclomyces guttulatus, known previously as Saccharomyces guttulata and Saccharomycopsis guttulatus. Van der Walt and Scott proposed the new genus name Cyniclomyces for the genus Saccharomycopsis (Guilliermond) to which this yeast was assigned, as there was confusion resulting from the homonyms Saccharomycopsis (Guilliermond) and Saccharomycopsis (Schiönning)1. The yeast Saccharomycopsis capsularis (previously assigned to the genus Endomycopsis (Stelling-Dekker)) is currently assigned to the genus Saccharomycopsis (Schiönning)1. The taxonomic classification of Cyniclomyces guttulatus is outlined in Table 1.

Table 1 Taxonomic classification of Cyniclomyces guttulatus
Full size table

The yeast C. guttulatus was first observed in the stomach and intestinal contents of rabbits by Remak in 1845 (ref. 2). Wilhelmi (1898), working with crude cultures of the yeast, which he obtained by the alternate desiccation and moistening of rabbit feces, succeeded in germinating these spores and reported them as possessing a double cell wall3. The pathogenic status of the yeast was unknown.

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Figure 3
Figure 4: Relative sizes of C. guttulatus (blue arrows), a coccidian oocyst (Eimeria spp.; red arrow) and a nematode egg (green arrow) obtained from rabbit feces.

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Diagnosis | Cyniclomyces guttulatus yeast. Lab Anim 37, 348–349 (2008). https://doi.org/10.1038/laban0808-348

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