Joshua Angelo 2024 IN-HOUSE REVIEW EDITION Colony Morphology

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29 Questions

What is the main structural unit of molds?


Which of the following is NOT a characteristic of fungi?


What is the term used to describe the mass of hyphae?


What is the term used to describe hyphae that have cross-walls?


Which of the following is NOT a type of conidium?


What is the term used to describe hyphae that lack cross-walls?


What is the most common cause of phaeohyphomycosis?

Dreschlera spicifera

What is the appearance of the colony morphology in the mold form?

Daisy-like, rosette, flowerette with a brown to black greasy appearance

Which condition is also known as Chromomycosis or Verrucous dermatitis?


Which organism's colony morphology is described as 'Vase-like/phialides, flask shaped with collarettes'?

Phialophora verrucosa

Which characteristic is NOT mentioned for Fonsecaea compactum?

Flask shaped with collarettes

Which fungal infection is known as 'desert rheumatism' and 'valley fever'?

Coccidioides immitis

What is the culture medium used for growing Duboisii, a causative agent of African histoplasmosis?

Pines medium

What is the infective stage of Coccidioides immitis?


Which fungus is associated with a yeast form that resembles B.dermatitidis in spherule appearance?

Histoplasma capsulatum

Which fungal infection is systemic-fatal and predominantly affects immunocompromised individuals?

Penicillium marneffei

What is the mode of transmission of Mucormycosis caused by Zygomycota/Mucorales?

Inhalation of sporangiospores

What type of tinea infection affects the head?

Tinea capitis

Which organism's colony has a fluffy white appearance with a lemon yellow reverse on potato dextrose agar (PDA)?

Microsporum canis

Which of the following is a characteristic of Trichophyton rubrum?

Colony has a red reverse

What is a distinctive feature of Epidermophyton floccosum macroconidia?

Smooth and thin-walled

Which organism's colony is characterized as having a 'suede leather appearance'?

Epidermophyton floccosum

Which test is positive for Trichophyton mentagrophytes?

Hair baiting/penetration

Which fungal infection is most commonly associated with rhinocerebral zygomycosis in diabetic patients with ketoacidosis?

Lichtheimia infection

Which fungal colony is characterized by rapid growth, woolly colonies, and the presence of brown rhizoids connected by stolons?


Which fungal infection is commonly associated with neutropenia and is the single most predisposing factor?

Aspergillus infection

Which fungal colony is described as having hyaline septate hyphae, dichotomously branched hyphae, and uniseriate or biseriate phialides?


Which fungal infection is associated with meningitis, pulmonary disease, and septicemia, particularly in AIDS patients?

Cryptococcus neoformans infection

Which fungal colony is described as having a bright salmon pink color and resembling Cryptococcus neoformans?


Learn about colony morphology characteristics including mold form like daisy-like appearance and yeast form with cigar bodies and asteroid shapes. Explore details about Phaeohyphomycosis caused by darkly pigmented fungi such as Dreschlera spicifera, Alternaria, and Cladosporium.

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