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16 Cards in this Set
- Front
- Back
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The cell membrane of Fungi are composed mainly of?
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Ergosterol
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In nature, most fungi derive their nutrition from?
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Decaying matter
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Almost all fungi are strict anerobes or aerobes?
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Aerobes
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Unicellular form of fungi? Multicellular?
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Yeast
Filamentous form called Mold |
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Reproduction of yeast
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Asexual reproduction via division called budding. The bud is a blastoconidia
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Molds grow as microscopic, branching, threadlike filaments called?
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Hyphae, which collectively are called mycelium
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Dimorphism
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Many pathogenic fungi may display both growth forms and can exist as either molds or yeasts. Frequently occurs during infection of a living host.
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With most fungi that cause systemic infections, what form is usually parasitic?
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Yeast, while the mold form is usually present in the environment.
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Asexual reproductive structures used for the identification of fungi. Sexual reproductive structures?
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Conidia
Spores |
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What protective mechanism normally limits fungal growth, but when altered allow fungi to proliferate?
What are two important causes? |
Normal bacterial flora
Antibiotics and changes in nutrition, may disrupt the normal flora |
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In what type of patient can the fungi of normal human flora become pathogenic?
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Immunocompromised
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Primary mechanisms that prevent the establishment of many fungal infections
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Neutrophil phagocytosis and killing
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52 y/o pt with a hx of chronic granulomatous disease develops a fungal infection with agar colonies of Candida and Aspergillus. What would the CBC show?
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Low neutrophilic count
Infection could also occur in those who are immunocompromised or with pts that have a disorder in neutrophil function such as myeloperoxidase deficiency. |
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Do antibodies play a major role in fungal infections?
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NO
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The most important host defense in the elimination of many fungi
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T-cell mediated immunity
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Solvent used in direct examination of fungal infections that dissolves tissue debris
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10% KOH
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