Mycology

• Fungi may be unicellular, multicellular, or dimorphic.
• Fungi are nonmotile, non-photosynthetic, and possess a rigid cell wall (with ergosterol)
• Ascospores are spores contained in a saclike structure
• Basidiospores are spores contained in a club-shaped structure
• Oospores are spore resulting from the fusion of cells from two different hyphae
• Zygospores Spores resulting from the fusion of cells from two identical hyphae
• hypersensitivity - allergic reaction
• Mycotoxicoses -eating food contaminated with fungal toxins
• mycetismus - poisoning caused by eating of the fungus
• mycoses - Fungal infections and diseases
• 37°C - temperature unicellular
• 20-30°C - Temperature for multicellular
• septate hyphae - segments
• coenocytic hyphae - non-septae
• spores - the reproducing bodies of molds.
• sporangium - produces the spores
• sporangiophore - holds the sporangia
• basidiomycota is also called as basidiomycetes
• ascomycetes is the other name for ascospores
• ascus is the holder of ascospores
• basidium is the holder of basidiospores
• antheridium is the holder for oospores and zygospores
• ascomycota is the phylum of ascospores
• basidiomycota is the phylum of basidiospores
• zygomycota is the phylum for oospores and zygospores
• silver nitrate is used for silver stain
• SDA is the main medium for fungal growth
• Potato Dextrose Agar is the alternative for SDA
• epidermis - superficial
• dermis - cutaneous
• dermis and underlying tissue - mucocutaneous
• internal organs of the body - systemic
• Piedra is also called as stone
• Black Piedra

  CA: Piedraia hortae

  Manifestation: form black nodules (granules)
• White Piedra

  CA: Trichosporon asahii (formely T. beigelii)

  Manifestation: soft friable, White nodules (granules)
• Malasseziosis

  CA: Malassezia furfur
• Pityriasis capitis

  aka: dandruff, scurf

  CA: Malassezia globosa
• Tinea nigra

  Manifestation: • Causes dark brown to black painless patches on palms and toes
• Two forms of Tinea Nigra

  • Tinea Nigra Palmaris
  • Tinea Nigra Pedis
• Superficial Mycoses • Black Piedra • White Piedra

  • Malasseziosis

  • Tinea nigra

  • Pityriasis capitis