STRUCTURE OF DERMATOPHYTES

Question 1

can cause cutaneous Mycoses

Answer 1

Dermatophytes

Question 2

Micronidia: Absent
Macroconidia: BROAD or spatulate, BEAVER’S TAIL, contains 2-5 cells by PERPENDICULAR cross walls

Answer 2

E. floccosum

Question 3

Micronidia: Sparse, clavate, sessile
Macroconidia: SPINDLE-shaped, TAPERED ends, ECHINULATE thick walls

Answer 3

M. canis

Question 4

Micronidia: BROADLY spindle-shaped with rounded ends
Macronidia: BROADLY spindle-shaped with rounded ends

Answer 4

M. gypseum

Question 5

Micronidia: RARE, chlamydospore-like
Macronidia: Chlamydoconidia-like swellings, BIZARRE-shaped

Answer 5

M. audouinii

Question 6

Micronidia: GRAVE-like clusters
Macronidia: CIGAR-shaped

Answer 6

T. mentagrophytes

Question 7

Micronidia: TEAR-shaped, birds on fence
Macronidia: PENCIL-shaped

Answer 7

T. rubrum
- red pigment on Cornmeal agar

Question 8

Micronidia: BALLOON-shaped
Macronidia: Cylindrical

Answer 8

T. tonsurans

Question 9

T/F
Epidermophyton affects Hair ONLY

Answer 9

FALSE
Skin and Nails

Question 10

T/F
Microsporum affects Nails ONLY

Answer 10

FALSE
Hair and Skin

Question 11

T/F
Trichophyton does not affect Hair, Skin or Nails

Answer 11

FALSE
Does affect Hair, Skin or Nails

Question 12

allowing fungi to infect the hair

Answer 12

Hair baiting

Question 13

infects the OUTER part of the hair follicle

Answer 13

Ectothrix

Question 14

has the ability to penetrate the INNER part of the hair

Answer 14

Endothrix

Question 15

T. mentagrophytes
Urease: ___
Thiamine: ___
Hair baiting: ___

Answer 15

(+) 2d
(-)
(+) ectothrix

Question 16

T. rubrum
Urease: ___
Thiamine: ___

Answer 16

(-) 7d
(-)

Question 17

T. tonsurans
Urease: ___
Thiamine: ___
Hair baiting: ___

Answer 17

(+) 2d
(+)
(-) endothrix

Question 18

Incubate the colony of fungi in rice at room temperature

Answer 18

Growth in Rice Grains

Question 19

Observe the part infected under wood’s lamp

Answer 19

Wood’s lamp fluorescence (364 nm)

Question 20

Growth in Rice Grains
Poor:
Good:

Answer 20

Poor: M. audouinii
Good: M. canis, M. gypseum

Question 21

Wood’s lamp fluorescence (364 nm)
(+)
(-)

Answer 21

(+): M. audouinii, M. canis
(-): M. gypseum