Mycology

Question 1

Rounded fungi that reproduce by budding

Answer 1

yeast

Question 2

Parasitic and saprophytic fungi causing cottony growth on an organic substance

Answer 2

Mold

Question 3

Systemic fungi

Yeast at body temp, Mold at room temp

Answer 3

Dimorphic fungi

Question 4

Found on humans

Answer 4

Anthropophilic

Question 5

Parasites of animals

Answer 5

Zoophilic

Question 6

Free living in soil

Answer 6

Geophilic

Question 7

Compared to bacteria, fungi needs less ___________ to survive

Answer 7

moisture

Question 8

Fungus stains what color with Gram stain?

Answer 8

Purple (+)

Question 9

Extremely pathogenic systemic fungi that grows at 37* C

Answer 9

Yeast

Question 10

What kind of colonies does yeast grow on agar?

Answer 10

Creamy, pasty colonies

Question 11

Yeast is __________ than GPCOC

Answer 11

bigger

Question 12

Most common all purpose fungal media

Answer 12

Sabourad’s Dextrose Agar

Question 13

Can also be used to grow yeast

Answer 13

Blood agar

Question 14

It is not possible to ID most yeast by

Answer 14

microscopic examination

Question 15

Yeast is IDed by using

Answer 15

biochemicals

Question 16

How long should yeast be incubated?

Answer 16

3-5 days

Question 17

Yeast that is commonly found in avian excreta, especially pigeon droppings
Can be aerosolized, inhaled, and could be 100% fatal if untreated
Cats are most commonly infected (nasal discharge and unresponsive to abx)

Answer 17

Cryptococcus neoformans

Question 18

Found in cytoplasm of macrophages
Dimorphic soil fungus and most common in Ohio, Missouri, and Mississippi River Valley
Inhalation of spores is most common route of infex
Bird and bat droppings

Answer 18

Histoplasma capsulatum

Question 19

Dimorphic soil fungus in semi-arid areas such as California, Nevada, Utah, Arizona, New Mexico, and Texas
Can take weeks to years to develop C/S
Young males more likely to be infected

Answer 19

Coccidioides immitus

Question 20

Dimorphic fungus
Mycelial phase found in soil and cultures, large thick walled yeast form in tissues
3 clinical forms: primary pulmonary, disseminated dz, and local cutaneous infex
More prevalent in dogs (HUNTING BREEDS) than cats

Answer 20

Blastomyces dermatitidis

Question 21

Yeast that causes thrush, stomatitis, and pneumonia in birds

Answer 21

Candida albicans

Question 22

Common yeast in dogs and cats - Otitis externae and dermatitis
Dx made by impression smear
Skin scales and infected hair samples can be mixed with KOH and dissolve debris

Answer 22

Malassezia pachydermatitis

Question 23

2 types of molds

Answer 23

1. Saprophytes

2. Dermatophytes

Question 24

Type of mold that is free living

Answer 24

Saprophytes

Question 25

Type of mold that causes skin infections | Ex: ringworm

Answer 25

Dermatophytes

Question 26

Molds grow _____ hyphae

Answer 26

aerial

Question 27

How do molds appear on media?

Answer 27

Furry/Fuzzy

Question 28

Molds produce a fruiting body that produce

Answer 28

spores

Question 29

Most commonly used media for mold growth Selective media containing antibiotics to inhibit bacteria and other fungus Indicator turns red in 72 hrs if contains dermatophyte

Answer 29

DTM (Dermatophyte Test Medium) | AKA Fungassay

Question 30

Genus of fungi that causes tinea capitis, tinea corpus, ringworm, and other dermatophytes

Answer 30

Microsporum

Question 31

Genus of pathogenic fungi that causes dermatophytoses in the hair, skin, and nails of humans

Answer 31

Trichophyton

Question 32

Genus of fungus that causes superficial and cutaneous mycoses

Answer 32

Epidermophyton

Question 33

2 types of test mediums for mold

Answer 33

1. DTM | 2. Derm Duet

Question 34

Mold should be incubated at what temp?

Answer 34

Room temperature

Question 35

If there is fluffy white to apricot growth on DTM it is

Answer 35

Dermatophyte +, ringworm +

Question 36

If there is black, brown, dark green growth on DTM it is

Answer 36

Saprophyte +, ringworm -

Question 37

How should DTM be stored for incubation?

Answer 37

Room temp, loose cap for aerobic growth, and in a dark place

Question 38

Mold media that is a plate with 2 sides (DTM and Rapid Sporulation Media)

Answer 38

Derm Duet

Question 39

No matter which product you use, you must examine the specimen under the _____________ to make a proper Dx

Answer 39

microscope

Question 40

Which slide prep involves using Lactophenyl Cotton Blue stain(LPCB) or NMB and using a pair of flammed teasing needles to pick mold from a plate?

Answer 40

Tease Prep

Question 41

Which slide prep tends to be gentler and leaves the mold more intact? Utilizes clear, transparent tape to obtain mold from plate

Answer 41

Scotch Tape Prep

Question 42

Morphologic feature that is long slender tubes

Answer 42

Hyphae

Question 43

Which type of hyphae contain walls or divisions

Answer 43

Septate hyphae

Question 44

AKA conidia Usually how mold grows Micro or Macro

Answer 44

Spores

Question 45

Spores enclosed in sacs and are released from these

Answer 45

Fruiting bodies

Question 46

Dz caused by dermatophytes is called

Answer 46

Dermatomycosis, cutaneous mycosis, or ringworm

Question 47

Alopecia in a circular area, hyperkeratosis, and possible redness or brown spots can be seen with

Answer 47

Dermatomycosis

Question 48

Dermatophyte that fluoresces under UV light Most common cause of ringworm ZOONOTIC

Answer 48

Microsporum canis

Question 49

Dermatophyte that causes ringworm in pigs, cats, horses, cattle, chickens, hedgehogs, guinea pigs, kangaroos, and rabbits

Answer 49

Trichophyton mentagrophytes

Question 50

Most common dermatophyte in cows | Infects humans but will not fluoresce under black light

Answer 50

Trichophyton verrucossum

Question 51

``` Produces macroconidia (giant spores with thick walls) Spindle or boat shaped ```

Answer 51

Microsporum

Question 52

Produces microconidia Small spores that are tear shaped and in grapelike clusters Slender and elongated

Answer 52

Trichophyton

Question 53

A saprophyte seen in birds that is a common cause of serious URI Opportunistic

Answer 53

Aspergillus