Meyerozyma guilliermondii (Wick.) Kurtzman & M. Suzuki 2010

Ulmus americana.

Cuba; Egypt; USA.

Colonies. Growth on 5% malt extract agar: after 3 days at 25°C, the cells are ovoidal to elongate, (1.5-4.8) × (2.0- 15.0) μm, and occur singly, in pairs, or in short chains. Growth is smooth to wrinkled and tannish-white in colour. Growth on the surface of assimilation media: generally pellicles are not formed, but rings may be present. Dalmau plate culture on morphology agar: after 7 days at 25°C, growth under the cover glass shows abundant, well-branched pseudohyphae bearing whorls of blastoconidia. True hyphae are not present. Aerobic growth is tannish-white, sometimes butyrous, smooth and glistening or dull and rugose. Margins are usually lobate. Teleomorph. Formation of ascospores: this species is heterothallic and only haploid forms have been isolated. Following the pairing of complementary mating types, the resulting asci produce one to four hat-shaped ascospores. The spores are liberated soon after formation. Ascospores were observed on 5% malt extract agar at 25°C, 5-15 days after pairing of complementary mating types.

Meyerozyma guilliermondii (formerly known as Pichia guilliermondii until its rename in 2010) is a species of yeast of the genus Meyerozyma whose asexual or anamorphic form is known as Candida guilliermondii.

Candida guilliermondii has been isolated from numerous human infections, mostly of cutaneous origin, if only from immunosuppressed patients. C. guilliermondii has also been isolated from normal skin and in seawater, feces of animals, fig wasps, buttermilk, leather, fish, and beer.