MEDICAL MICROBIOLOGY MMIC 201 Prepared by Nabeel AlMawajdeh RN,MSC' King Saud UniversityAflaj Colleg

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MEDICAL MICROBIOLOGY (MMIC 201) Prepared by
Nabeel Al-Mawajdeh RN,MSC.King Saud
University-Aflaj College
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• CHAPTER 4
• Mycology
• Nabeel Al-Mawajdeh RN.MCS

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Mycology

• Mycology is The study of fungi.
• Mycoses means the diseases caused by fungi.
• Fungi are eukaryotic no photosynthetic organisms.
  Mostly they, are nonmotile. Fungi play a key
  factor in recycling the dead vegetation matter.
  They also can destroy food, fabrics, and leather.
  They can produce animal toxins and some are
  parasites of plants. About 100 fungal species
  infect humans and cause disease.
• Nabeel Al-Mawajdeh RN.MCS

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Mycology (Contd)

• A fungus is actually a primitive plant that is
  found in air, in soil, on plants and in water.
  Some common fungi include mushrooms, yeast, mold
  and mildew.
• Nabeel Al-Mawajdeh RN.MCS

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Morphological Classification

• Yeast these are oval or round cells that
  reproduce by budding e.g. candida and
  cryptococcus neoformans.
• Filamentous fungi these are branching filaments
  (hyphae) which may be separate or non-separate
  e.g. dermatophytes and Aspergillus.
• Dimorphic fungi these occur in 2 forms a yeast
  form in tissues or when grown at 37C and a
  filamentous form when grown at 22C, e.g.
  Histoplasma, Blastomyces, Coccidioides.
• Nabeel Al-Mawajdeh RN.MCS

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Clinical Classification

• Superficial mycoses like oral thrush and
  vaginitis that caused by Candida albicans.
• Cutaneous mycoses involve the skin, nail or
  hair.
• e.g. dermatophtes, cutaneous candidiasis.
• Systemic mycoses like lung infection that caused
  be Aspergillus fumigates.
• Nabeel Al-Mawajdeh RN.MCS

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Reproduction of Fungi

• All fungi reproduce asexually by budding, asexual
  spores, fission. Most fungi can reproduce
  sexually by gametes haploid gametes fused to
  form the zygote which give rise to a mature
  individual.
• Nabeel Al-Mawajdeh RN.MCS

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• The End
• Nabeel Al-Mawajdeh RN.MCS