Yeast/Fungus

Aspergillus versicolor

STRUCTURE AND PHYSIOLOGY Aspergillus versicolor is a slow-growing filamentous fungus found in damp indoor environments and on food products. Colonies can vary greatly in color, starting as white and changing to yellow, orange, and green with pink or flesh hues intermixed as they mature. A. versicolor can grow in very...

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Talaromyces pinophilus

STRUCTURE AND PHYSIOLOGY Talaromyces pinophilus, formerly known as Penicillium pinophilum, is fungus that forms fruiting bodies made up of tightly interwoven hyphae (ascocarps). Depending on the host, T. pinophilus may exhibit parasitic or growth-promoting effects on plants. TRANSMISSION AND DISEASE Some species of Talaromyces (Penicillium) are known to cause infections in humans,...

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Malassezia furfur

STRUCTURE AND PHYSIOLOGY M. furfur is a spherical-shaped yeast with a distinct bottlenose at the end. This commensal, lipophilic fungi is generally single-celled but may form hyphae upon infection, an atypical characteristic of most Malassezia species. TRANSMISSION AND DISEASE M. furfur is unable to synthesize fatty acids by itself and must utilize...

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Fusarium keratoplasticum

STRUCTURE AND PHYSIOLOGY F. keratoplasticum is a filamentous fungi. Research has indicated that the hyphae and chlamydospores of F. keratoplasticum can produce melanin in-vitro and the hyphae can produce pigment in-vivo. TRANSMISSION AND DISEASE F. keratoplasticum can cause a broad spectrum of infections based on how the fungi are introduced to the...

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Mucor circinelloides

STRUCTURE AND PHYSIOLOGY Mucor circinelloides is a fungus commonly found in soil and food. M. circinelloides is described to exhibit dimorphism as it is found to grow in either filamentous mycelia or multipolar budding yeasts, depending on its environment. This microorganism reproduces asexually using sporangiophores and thrives in cooler temperatures. TRANSMISSION...

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Penicillium ludwigii

STRUCTURE AND PHYSIOLOGY P. ludwigii is a drug-resistant, anamorphic fungus found in the environment (often sediment and soils), with one study even demonstrating the potential tolerance of a Brazilian isolate of the fungus to uranium exposure. TRANSMISSION AND DISEASE P. ludwigii is a close relative of P. janthinellum, both of which rarely...

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Aureobasidium pullulans

STRUCTURE AND PHYSIOLOGY A. pullulans is a black-yeast-like mold that can express many varying morphologies based on growth conditions. Prior to the formation of spores, the mold appears smooth and yellowish, creamy, or light pink. Asexual, melanated spores are eventually formed which gives it a characteristic black color. This fungus...

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Rhinocladiella aquaspersa

STRUCTURE AND PHYSIOLOGY R. aquaspersa is a black yeast-like fungus that is commonly found as a conidiophore, or a sexual spore generating aerobic fungus. This fungus is closely related to other members of the order Chaetothyriales that are associated with opportunistic infections. It is more prevalent in hot, arid portions...

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Botrytis cinerea

STRUCTURE AND PHYSIOLOGY Botrytis cinerea, also known as gray mold, is a primarily anamorphic, necrotrophic fungi that is primarily found on injured plant tissues and in damp places around homes and gardens. The microorganism thrives at temperatures between 22°C and 25°C with an 85% relative humidity or higher. Botrytis cinerea...

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Trichoderma viride

STRUCTURE AND PHYSIOLOGY Trichoderma viride, also known as green mold, is primarily found in rotting wood, soil, and plants’ root systems and tolerates temperatures between 15°C and 40°C (59°F - 104°F). It acts primarily as an opportunistic, non-virulent, symbiotic fungus in most plant species and is often used for the...

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Trichoderma virens

STRUCTURE AND PHYSIOLOGY Trichoderma virens is a fungus commonly found in soil that acts as a nonpathogenic parasite to plants. It can be characterized by its rapid growth and bright green spore that is formed at the tip of the hypha of the fungus. Growth is initially fluffy and white....

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Mycosphaerella fijiensis

STRUCTURE AND PHYSIOLOGY Colonies of Mycosphaerella fijiensis are slow-growing on PDA. They are raised, compact and have a gray to pale-buff velvety surface. TRANSMISSION AND DISEASE Mycosphaerella fijiensis causes Black Leaf Streak in banana and plantain plants. It is spread from tree to tree by wind, rain, and irrigation water splashes. It...

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Candida tropicalis

Candida tropicalis

Structure and Physiology Candida tropicalis is a yeast that is closely related and often forms in biofilms with C. albicans.  Transmission and Disease Humans normally share a commensalism relationship with Candida genus, but C. tropicalis has been identified as the most pathogenic of the group. C. tropicalis can become pathogenic if a person is immunocompromised or...

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Penicillium sp.

Penicillium sp.

Structure and Physiology This fungi genus contains over 300 species which have roles in the production of antibiotics (Penicillin), organic acids, and cheeses. These saprophytic molds are notorious for fruit and vegetable spoilage, causing a fuzzy blue texture. Penicillium is a latin root meaning "painter's brush", which is used as a descripitor...

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R. mucilaginosa

Rhodotorula mucilaginosa

Structure and Physiology Rhodotorula mucilaginosa (formerly Rhodotorula rubra) is a saprophytic yeast. A ubiquitious environmental inhabitant, it can be isolated from soil, water, and air samples. Transmission and Disease This yeast can be a human pathogen in rare instances and has been responsible for cases of fungal peritonitis, meningitis, and catheter infections...

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Trichophyton mentagrophytes

Trichophyton mentagrophytes

Structure and Physiology Trichophyton mentagrophytes is a fungus that is part of a group known as dermatophytes. Transmission and Disease This fungus is known to cause a skin infection known as Dermatophytosis or Ringworm which appears on a person's skin as an inflamed circular pattern. The invasion of the skin, hair, and...

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A. niger

Aspergillus niger

Structure and Physiology This fungi is a conidiophore, or a sexual spore generating aerobic fungus. A. niger is a xerophilic fungi, which means that it is a mold that does not require free water for growth and can grow in humid environments. This organism is responsible for food spoilage and black mold.  Transmission and...

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C. albicans

Candida albicans

Structure and Physiology Candida albicans is a diploid, Gram-positive fungus that can take on a unicellular (yeast) or multicellular (hyphae, pseudohyphae) form. A unique characteristic to this microbe is that it can switch between different phenotypes. The change between the two phenotypes can happen multiple times and is spontaneous. Studies...

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