Fungi: Introduction

Question 1

What are the 2 forms of fungi?

Answer 1

Yeast form
Mold form

Question 2

Pathogenic yeasts reproduce by _________. Molds reproduce by _________.

Answer 2

budding
sporulation

Question 3

When pathogenic yeasts reproduce, they form _______.

Answer 3

blastospores

Question 4

Term for branched, elongated form of yeast.

Answer 4

pseudohyphae

Question 5

_______ yeasts reproduce by sporulation.

Answer 5

fission

Question 6

______ form of fungi are multicellular and filamentous while ______ form are mononucleated and single cellular.

Answer 6

mold
yeast

Question 7

Molds have tubular, branching, multinucleated, filamentous structures called ______.

Answer 7

hyphae

Question 8

Match the descriptor term of mold hyphae characteristics:

1. cross walls present
2. few or no cross walls
3. intertwined hyphae masses

Answer 8

1. septate
2. aseptate
3. mycelium

Question 9

(T/F) Sporulation only occurs asexually.

Answer 9

False

Question 10

(Asexual/sexual) sporulation occurs via nuclear fission.

Answer 10

sexual

Question 11

A _______ is a fungus in a sexually reproductive/sporulation state.

Answer 11

telemorph

Question 12

_______ is a fungus in a state of asexual reproduction/sporulation.

Answer 12

anamorph

Question 13

(Anamorph/Telomorph) is in the majority of fungal lesions.

Answer 13

anamorph

Question 14

What are the asexual spores called produced by hyphae?

Answer 14

conidia

Question 15

Match the 3 types of Conidia with each description:

1. asexual spores produced by segmentation of hyphae
2. asexual spores produced by budding yeast
3. large, thick-walled asexual spores formed by differentiation of hyphae

Answer 15

1. arthrospores
2. blastospores
3. chlamydospores

Question 16

(T/F) Fungi can be monomorphic or dimorphic, depending on how many forms they can grow into.

Answer 16

True

Question 17

Dimorphic fungi can be either ________-dependent or ________-dependent.

Answer 17

temperature
nutrient

Question 18

What kind of fungi invade hair and vegetative hyphae grow in the hair shaft?

Answer 18

dermatophytes

Question 19

Dermatophyte diseased state where arthrospores form on the surface of the hair shaft.

Answer 19

ectothrix

Question 20

Dermatophyte diseased state where arthrospores form on the inside of hair shaft.

Answer 20

endothrix

Question 21

Dermatophyte diseased state where arthrospores form on both sides of the hair shaft.

Answer 21

ecto-endothrix

Question 22

Term for dark brown or black fungi.

Answer 22

dematiaceous

Question 23

Term for “spiny” walls of some conidia.

Answer 23

echinulate

Question 24

Within the cell wall of fungi, ______ are D-glucose residues and ______ are N-acetyl glucosamine residues.

Answer 24

glucan
chitin

Question 25

What fungal plasma membrane structure is a target for anti-fungal treatments?

Answer 25

ergosterol

Question 26

(T/F) Subcutaneous fungal infections are a secondary infection from indirect contact with fungi.

Answer 26

False - caused by direct implantation

Question 27

Term for subcutaneous granulomatous abscess which spreads to nearby tissues caused by fungal infection.

Answer 27

mycetoma

Question 28

Term for a mycetoma with granules in pus.

Answer 28

maduromycosis

Question 29

Systemic fungal infections are caused by spore ________.

Answer 29

inhalation

Question 30

(T/F) Systemic fungal infection is contagious to nearby animals.

Answer 30

False

Question 31

Term for intoxication that occurs from ingestion of fungal metabolites in food products.

Answer 31

mycotoxicosis

Question 32

What base media is used to culture fungi for diagnosis?

Answer 32

sabouraud's dextrose agar

Question 33

What pH is Sabouraud's Dextrose Agar? Why?

Answer 33

5.6 inhibits bacterial growth

Question 34

What two CC mediums are used to inhibit nonpathogenic fungi and bacteria when culturing fungi for diagnosis?

Answer 34

cycloheximide chloramphenicol

Question 35

What serology test is most common in diagnosing fungal infections?

Answer 35

complement-fixation