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School of Molecular & Biomedical Science
The University of Adelaide
AUSTRALIA 5005

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Dr David Ellis
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Candida haemulonii

Synonym: Torulopsis haemulonii

On Sabouraud's dextrose agar colonies are white to cream colored, smooth, glabrous and yeast-like in appearance. Microscopic morphology shows numerous ovoid to globose, budding yeast-like cells or blastoconidia, 3.0-5.0 x 3.0-6.5 um in size. No pseudohyphae produced.

India Ink Preparation: Negative - no capsules present.

Dalmau Plate Culture on Cornmeal and Tween 80 Agar: Spherical to ovoid, budding yeast-like cells only. No pseudohyphae produced.

Physiological Tests:

Germ Tube test is Negative
Hydrolysis of Urea is Negative
Growth on Cycloheximide medium is Positive
Growth at 37C is Positive

Fermentation Reactions: Where fermentation means the production of gas and is independent of pH changes.

Positive: Glucose; Sucrose; Trehalose.
Variable: Maltose.
Negative: Lactose; Galactose.

Assimilation Tests:

Positive: Glucose; Galactose; Maltose; Sucrose; Trehalose; D-Xylose; Melezitose; Glycerol; Raffinose (delayed); L-Arabinose (delayed); Ribitol (delayed); Galactitol (delayed); D-Mannitol; L-Rhamnose; D-Glucitol; Citric acid; Succinic acid.
Negative: Potassium nitrate; Lactose; L-Sorbose; Cellobiose; D-Ribose; Melibiose; Erythritol; Inositol; Soluble Starch; Salicin; D-Arabinose; DL-Lactic acid.

Clinical significance:

Candida haemulonii has been reported from a few cases of fungemia but clinical isolations remain rare. It has also been isolated from fish and a dolphin. C. haemulonii may be difficult to distinguish from C. famata using some commercial yeast identification systems due to data base limitations.

Mycosis: Candidiasis

Further reading:

Kreger-Van Rij, N.J.W. (ed) 1984. The Yeasts: a taxonomic study. 3rd Edition. Elsevier Science Publishers B.V., Amsterdam, The Netherlands.

Rippon, J.W. 1988. Medical Mycology. 3rd Edition. W.B. Saunders Co., Philadelphia, USA.