Dematiaceous Fungi (PART 2) Flashcards Preview

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Flashcards in Dematiaceous Fungi (PART 2) Deck (17):
1

Fonsecaea
- Microscopic appearance

acrotheca predominates: conidiophores blunt and knotted or club-shaped; conidiophores single or in short chains; Elliptical conidia at tip and along sides of tip

2

Phialophora
- Microscopic appearance

Flask-shaped (urn shaped) phialides with flared collarettes

3

Cladosporium
- Microscopic appearance

Chains of elliptical conidia, branching Conidiophores (usually a contaminant)

4

Cladophialophora bantiana
- Microscopic appearance

very long chains of conidia, little branching

5

Difference between Cladosporium and Cladophialophora

Cladosporium: Contaminant; shorter chains, more branching; does not grow at 40C
Cladophialophora: Neurotropic mold; long chains of conidia, little branching; grows at 40C

6

Exophiala
- Microscopic appearance

Pointed conidiophores with oval conidia;

7

Exophiala
- Plate morphology

slow growth, starts yeast-like then velvety

8

Curvularia
- ________ growth

rapid

9

Curvularia
- Microscopic appearance

- Conidiophores are jagged where conidia attach
- Conidia are 4-celled, swollen central cell (boomerang shaped, transverse septa only)

10

Alternaria
- _________ growth

rapid

11

Alternaria
- Microscopic appearance

Drumstick/snowshoe macroconidia with longitudinal and transverse septa

12

Biporalis
- Microscopic appearance

- twisted conidiophores where conidia are attached
- Conidia are oval and multi celled ("peapods")

13

Stachybotrys
- Thought to possibly cause "_____ _____ _____"

sick building syndrome

14

Stachybotrys
- Reasons for public concern over mold causing "sick building syndrome"

- Mycotoxins
- mostly allergic reactions in patients (immunocomp at risk)

15

Stachybotrys
- have an affinity for high _________

cellulose (e.g. wallboard)

16

Stachybotrys
- Steps that can be taken to prevent mold overgrowth in homes

- clean with bleach
- find/repare water leaks
- air conditioning or dehumidifiers
- ventilation in bathrooms and kitchens
- clean regularly
- dont carpet bathrooms

17

Microscopic morphology of Stachybotrys

Dark, oval conidia singly or in clusters. Three to ten phialides in an upright whorl.