MYCOSES (Superficial mycoses)

Question 1

Caused by Malassezia furfur; Chronic, mild superficial infection of the stratum corneum:

Answer 1

Pityriasis versicolor

Question 2

Malassezia microscpic features:

Answer 2

Short unbranched hyphae and spherical cells observed
“Spaghetti and meatballs” appearance

Question 3

Lesions caused by Malassezia fluoresce under:

Answer 3

Wood’s lamp

Question 4

Tinea nigra (tinea nigra palmaris) is caused by:

Answer 4

Dematiaceous fungus Hortaea (Exophiala) werneckii

Question 5

Lesions observed in Tinea nigra:

Answer 5

Dark brown to black discoloration, often on the palm

Question 6

Nodular infection of the hair shaft cased by Piedraia hortae:

Answer 6

Black piedra

Question 7

Infection with Trichosporon species; presents as larger, softer, yellowish nodules on the hair.

Answer 7

White piedra