Fungi- 21,22

gdiba002's version from 2016-11-10 15:48

Section 1

Question Answer
4 groups of fungiChytridiomycota, Zygomycota, Ascomycota, Basidiomycota
Only group that has flagellaChytridiomycota
Fungi imperfectionly the asexual reproductive stage is known
another name for fungi imperfectiHyphomycetes or Deutromycota
Main group associated with fungi imperfectiAscomycota
Morphological classifications of fungi Yeast, Mold, Dimorphic
Multicellular Mold
Can be both a yeast and a mold depending on temperature Dimorphic
Unique components of fungiChitin, glucans, mannans, ergestrol

Section 2

Question Answer
Reproductive structure of ChytridiomycotaFlagellated gamete
Reproductive structure of ZygomycotaConjugation
Reproductive structure of Ascomycota Ascus structure
Reproductive structure of Basidiomycota club-shaped basidia
Reproduction of yeast viaBudding
Budding cells Blastoconidia
Main mode of vegetative growth for multicellular yeastHyphae

Section 3

Question Answer
Subcellular structure of FungiPolysaccharide capsule, cell wall, cell membrane, cytoplasm
Purpose of capsule Antiphagocytic (virulence factor)
Cell wall made up of Chitin, glucans, mannans
Purpose of cell wall provides shape, rigidity, strength
Cell membrane made up of phospholipid bilayer and ergestrol
Purpose of cell membrane Protects cytoplasm, facilitates capsule/cell wall synthesis

Section 4

Question Answer
Examples of Polyenes Amphotericin B, Nystatin
Mechanism of Amphotericin B interacts with ergosterol to form a pore
Mechanism of Azoles Inhibit ergestrol synthesis
Mechanism of Echinocandins Inhibits synthesis of B-glucans by inhibiting the synthase
Examples of Echinocandins Caspfungin
Mechanism of Flucytosine Inhibits pyrimidine synthesis

Section 5

Question Answer
Agar used for mixed infections Chromagenic Agar
Test to differentiate fungal/non-fungal skin infections KOH
Specimen stained in a single step Lactophenol Blue
Fungal elements stained bright red color PAS
Fungi stained black w/ light green background GMS
India Ink Staining Cryptococcus neoformans and C. gatti
Binds to cellulose & chitin; "black-lighting" appearance Calcofluor White Staining
Used to identify C. albicans directly from + blood culture FISH

Section 6

Question Answer
Pityriasis versicolor superficial
Tinea nigra superficial
Black & white piedra superficial
Dermeatophytes keratin "loving" fungi that cause cutaneous infections
Tinea Cutaneous

Section 7

Question Answer
Superficial Infectionoutermost layer of stratum corneum
Cutaneous Infection Epidermis
Subcutaneous Dermis
Systemic Bloodstream