Histoplasma capsulatum is a pathogenic, dimorphic ascomycete fungus that causes the respiratory infection histoplasmosis. It is ecologically associated with birds and bats, particularly in the Ohio and Mississippi river valleys, and conversion from mold to yeast occurs in the host's lungs.

Histoplasma capsulatum

Blastomyces dermatitidis is a dimorphic ascomycete fungus that causes the respiratory disease blastomycosis.

Blastomyces dermatitidis

Dimorphic fungi are species capable of transitioning between yeast and mold forms in response to environmental shifts, such as changes in nutrient availability or temperature fluctuations (typically growing as a mold at 25 °C and as a yeast at 37 °C).

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- Hyphae
- Pseudophyphae
- Dimorphic Fungi
-  Chitin

Physical Characteristics of Different Fungi

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Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

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Dimorphic Fungi

Hyphae are the microscopic, thread-like filaments that make up the bodies of multicellular fungi, such as molds, as well as the flesh of larger fungi.

Hyphae

Pseudohyphae are structures formed by budding yeasts when newly produced daughter cells remain attached to one another, forming short chains of cells with clusters at intervals that resemble true fungal hyphae.

Pseudohyphae

Chitin is a structural polysaccharide composed of N-acetylglucosamine (NAG) polymers. It constitutes a primary component of fungal cell walls and the exoskeletons of insects.

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