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Flashcards in Fungal pathogens/Parasites Deck (64)
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1

Characteristics of fungi

-heterotrophic
-3uM-hundreds of feet long
-sexual or asexual reproduction
-rigid cell walls made of chitin but have membrane bound organelles
--ergosterol in their cell membrane
-some species have a polysaccharide capsule

2

Saprobes

fungi that live on dead/decaying organic matter

3

Symbionts

fungi that lice on another organism and it is mutually advantageous to both

4

Commensals

fungi that live on another, no detriment to host

5

parasites

fungi that live on another, detriment to host

6

Fungi can occur in two basic forms:

1) Yeast
2) Mold (hyphae)

7

Yeast

unicellular type of fungi. They reproduce via budding or fission. Colonies look moist/mucoid. Sometimes they can look like hyphae if they are elongated into pseudohyphae

8

Mold

Type of fungi. made of filamentous growths (hyphae). can form a mycelium. Hyphae can be septal or nonseptal

9

A mass of hyphae is called a____

mycelium

10

Are all organisms exclusively yeast or hyphae?

No, some fungi are dimorphic and can exist in a yeast or a hyphal form depending on the environment

11

Which fungi are dimorphic?

Sporothrix
coccidoides
histoplasma
blastomyces
paracoccidoides

12

Rhizoids

specialized hyphae that look like roots from vegetative hyphae

13

Condida

asexual spores that come off of aerial hyphae . Can be two types: macrocondida or microcondida

14

Macrocondida

large multinucleate spore

15

Microcondida

small unicellular spore "birds on a wire appearance"

16

Sporangia

endospores enclosed in membranous sac. Held up by a sporangiophore

17

Sporangiophore

specialized hyphae bearing sporangia

18

Chlamydospore

Form along vegetative hyphae
• Round and very thick-walled
• Resistant to adverse environmental conditions • May be terminal or intercalary chlamydospores

19

Arthrospores

• Develop along vegetative hyphae
• Thick-walled, numerous, elongated • May be consecutive or alternative

20

Spherules

Develop during yeast phase in some
organisms (Coccidioides immitis)
• Spherules filled with small endospores

21

Blastoconidia

• Small buds seen in yeast that divide asymmetrically
• Not present in division by fission

22

Thallus

a cultured fungal colony

23

Floccose

wooly

24

Lanose

cottony

25

Glabrous

smooth

26

Dematiaceous

pigmented

27

Geophilic

acquired from soil

28

Zoophilic

acquired from animals

29

Anthropophilic

acquired from humans

30

Sabouraud’s agar

non-selective auger used as screening media