Mycology

Question 1

Mode of transmission of dimorphic fungus that lives on vegetation occurring most often in gardeners

Answer 1

Thorn pick (Sporothrix schenckii)

Question 2

An oval yeast with narrow based bud surrounded by a wide polysacccharide capsule in india ink also tests positive for:

Answer 2

Cryptococcal antigen Latex agglutination system, CALAS (C. neoformans)

Question 3

Pneumonia caused by an indeterminate organism which induces an inflammatory response in the alveoli (ARDS) manifests when CD4 is less than

Answer 3

200 (P. jiroveci)

Question 4

Sporothrix schenckii: rose thorns; Histoplasma capsulatum:

Answer 4

Bird droppings or Bat guano

Question 5

The most common cause of fungal pneumonia has this characteristic bud:

Answer 5

Broad based (Blastomycosis dermatitidis)

Question 6

Thick yeast with multiple buds in wheel configuration more commonly affects what sex?

Answer 6

Males. Growth is inhibited by estrogen (Paracoccidioides brasiliensis)

Question 7

Fungus whose septate hyphae forms acute angles exists only as

Answer 7

Molds (Aspergillus fumigatus)

Question 8

Acute angles: Aspergillus; Right angles:

Answer 8

Rhizopus oryzae and Mucor spp.

Question 9

Asexual reproductive structures produced either from transformation of a vegetative yeast or hyphal cell or specialized conidiogenous cell

Answer 9

Conidia

Question 10

Large thick walled conidia produced from terminal or intercalary hyphal cells

Answer 10

Chlamydoconidia/Chlamydospores (Candida albicans)

Question 11

Conidia that result from the fragmentation of hyphal cells

Answer 11

Arthoconidia/arthospore (Coccidioides immitis)

Question 12

Discrete, serpentine, hyper or hypopigmented macular patches that may enlarge or coalesce is diagnosed by

Answer 12

Direct microscopy with KOH (Pityriasis versicolor)

Question 13

A manifestation of tinea capitis caused by Trichophyton schoenleinii which leads to formation of scutula around follicle

Answer 13

Favus

Question 14

In biopsy of Sporotrichosis infections, stain with Gomori methenamine silver produces color

Answer 14

Black

Question 15

In culture of Histoplasmosis at 25C, it appears as

Answer 15

Hyphae with macroconidia

Question 16

In culture of Histoplasmosis at 37C, it appears as

Answer 16

Yeast

Question 17

Self limited influenza like illness caused by inhaled arthroconidia

Answer 17

Valley fever (Coccidiomycosis)

Question 18

In contrast to Histoplastoma, Blastomycoces is located more at the _________ of an infected lesion

Answer 18

Periphery.

Question 19

KOH preparation of direct scraping shows spherical cells 10-40microns in diameter with thick birefringent cell wall surrounded by several peripheral buds joined by narrow neck

Answer 19

Paracoccidioides (mariner’s wheel)

Question 20

Pathognomonic of invasive candidiasis

Answer 20

Pseudohyphae, true hyphae and budding yeast

Question 21

Beginnings of true hyphae in Candia species which express more surface receptors for attachment and binding opsonins

Answer 21

Germ tube

Question 22

Allergic form of disease transmitted by a conidia

Answer 22

ABPA (allergic brochopulmonary aspergillosis)

Question 23

A hypersensitivity reaction characterized by inflammatory reaction other than the site of fungal infection caused by fungi with green fluorescence on wood’s lamp is called

Answer 23

Dermatophytid reactions (Microsporum, Trichophyton, Epidermophyton)

Question 24

Chronic subcutaneous infection induced by traumatic inoculation of saprophytic fungi

Answer 24

Madura foot (mycetoma)