2011-087- Microbiology-Intro to Mycology Final

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Subject: Microbiology and Parasitology Topic: Introduction to Mycology Lecturer: Dr. Eleanor P. Padla Date of Lecture:July 26, 2011 Transcriptionists: JC Luna, Fluffy Editor: JC Luna Pages: 7

Mycology  study of fungi Medical mycology  deals with fungi that cause human diseases

3 Morphologic Forms: 1. Yeasts 2. Filamentous fungi (molds) 3. Fleshy fungi (e.g. mushrooms, most common) Fungi VS Bacteria Characteristics Size

Cellular Differentiation

Nuclear & Cellular Structure Chemical Composition

Reproduction Spore Formation

Life Cycle Cellular Structure

Fungi 3µ (yeasts) - 3 ft. (molds; due to longer hyphae) Unicellular (yeasts) to Multicellular (molds and mushrooms) Eukaryotic

Cell wall is mainly Chitin; sterols (primarily ergosterol) are usually present on cell membranes Sexual and Asexual (binary fission) For Reproduction; are not Thermoresistant

Simple (yeasts) to Complex (molds) With Membranebound Organelles

Bacteria 1µ-1.5µ

Unicellular

Prokaryotic Cell wall consists of  peptidoglycans; Cell membranes have no sterols (except mycoplasma) Asexual; binary fission For Thermoresistance and survival during periods of  Desiccation (survival in adverse conditions) Simple (binary fission) Nucleolus and Ribosome

GENERAL CHARACTERSITICS OF FUNGI y Eukaryotic y Unicellular (yeasts) to multicellular (molds) y Microscopic to macroscopic in size y Non-photosynthetic (they are achlorophyllous as opposed to plants. This is one of the reasons they are re-classified years ago as non-plants) y Chemoheterotrophic; absorb nutrients, do not digest y Saprophytes / parasites y Nutritionally adaptable  can thrive with little amount of organic substrate and moisture y Aerobic (molds to facultatively anaerobic (yeasts, that is why they can be used for fermentation)

y

   Y    S

Mesophilic  can thrive at temperature below that of the body (