SK320 U7 Fungi

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SK320 U7 Fungi
2015-01-02 08:18:01

Unit 7 - Fungi
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  1. Biotrophy
    Obtaining organic matter from living organisms. Opposite of a saprophyte (obtains from dead organisms.
  2. Chitin
    A major component of fugal cell wall. A polymer of N-acetlyglucosamine, which is an important structural polysaccharide.
  3. Dermatophytes
    • The ringworm fungi, a group of around 20 closely related mould fungi from three genera; Trichophyton, Microsporum, Epidermophyton. 
    • They usually cause superficial skin infections and can digest keratin, found in nails, hair and skin.
  4. Dimorphic fungi
    • Fungi that are able to grow as moulds or yeasts, depending on the growth conditions. 
    • For example, Candida albicans, which causes Thrush.
  5. Ergosterol
    A sterol that is characteristic of fungal plasma membranes.
  6. Hyphae
    • (Singular hypha)
    • The thread like units of which fungi and fungus-like protists are composed. Hyphae grown at their tips, have a rigid wall and may branch and have cross walls (septa).
    • Note mycelia - a mass of hyphae
  7. Moulds
    One of the two main groups of fungi, where growth occurs as a series of interconnected coenocytic hyphae with many nuclei in a common cytosol
  8. Mycelia
    • (Singular mycelium)
    • The mass of hyphae forming the body of a fungus
  9. Mycoses
    A disease caused by a fungus
  10. Saporophytes
    • Organisms that obtain organic matter from dead organisms.
    • Opposite to biotrophy, where matter is obtained from living organisms.
  11. Subcutaneous
    • Describing the site of infection, just under the skin. Many mycoses's are located here, although they require an initial wound to gain access. 
    • Note superficial mycoses's occur on the skin surface.
  12. Superficial
    • A mycoses which occurs on the skin's surface.
    • Note subcutaneous infections occur below the skin.
  13. Tineas
    A general term to describe a skin mycoses; specifically named after their location, such as tineas cruris (groin), tineas capitis (scalp).
  14. Yeasts
    One of the two major groups of fungi, unicellular as opposed to the hyphal form of fungus (being the other group, moulds).