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Flashcards in E2 Mycology Deck (36)
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1

What type of cells are fungi?

Eukaryotes! like animals & plants
(not prokaryotes like bacteria)

2

What are some properties of fungi?

1. Cell walls
2. Some sexual others asexual

3

How can fungi grow?

1. Single celled yeasts
2. Multicellular colonies

4

What are molds?

Have hyphae
= multicellular filaments

5

What are yeasts?

Single cells
Bidding = one cell is smaller
Fission = cells are same size

6

What are pseudohyphae?

Elongated yeast cells
From incomplete budding

7

What is a hypha?

Tubular structure of mold

8

What is a mycelium?

Complex of hyphae

9

What are the two forms of fungal cells?

1. Yeast
2. Hyphae

10

What is a septum?

Cross wall the divides hyphae

11

What is a coenocytic?

A hyphae without a septum

12

What are dimorphic fungi?

Can exist in both forms:
1. Yeast
2. Hyphae = mold

13

What are dermatophytes?

Septate fungi (hyphae)
Eat keratin
Grow in skin, hair, nails

14

What genre cause is ringworm?

1. Microsporum = hair & skin
2. Trichophyton = hair, skin & nails
3. Epidermophyton = skin

15

What species are affected by ringworm?

ALL

16

What are the infectious parts of dermatophytes?

Arthrospores
= fragments of hyphae

17

What is M. canis?

Cause of ringworm in dogs & cats

18

What is Trichophyton verrucosum?

Cause of ringworm in cattle & sheep

19

What is Trichophyton equinum?

Most common cause of ringworm in horses

20

What looks similar to ringworm in sheep?

Dermatophilus congolensis
"Lumpy wool" & "Strawberry foot rot"
or mites!

21

What is Microsporum nanum?

Cause in ringworm in pigs

22

What is Microsporum gallinae?

Cause in ringworm in chickens

23

Why do fungi sometimes glow in Wood's lamp?

Pteridine compounds

24

What is Cryptococcus?

Common cause of subcutaneous mycoses

25

What are some systemic mycoses?

1. Blastomycosis
2. Histoplasmosis
3. Coccidioidomycosis
4. Cryptococcosis
= dimorphic fungi

26

What is Blastomyces dermatitidis?

Midwest
Inhalation of spores
Lung infection = granulomas
Bone infection
Dogs & cats, HUMANS

27

What is Histoplasma capsulatum?

USA river valley
Bird & bat droppings
Very similar to blastomycosis

28

What species is most often infected with Histoplasma capsulatum?

Cats

29

What is the most common fungal infection in cats?

Cryptococcus

30

What is Coccidioides immitis?

Desert soils!
"Valley fever"
Sheep, cattle, dogs, HUMANS