Mycology — MCQs August 22, 2025 by u930973931_answers 50 Score: 0 Attempted: 0/50 Subscribe 1. The causative agent of cryptococcosis is: (A) Candida albicans (B) Aspergillus fumigatus (C) Cryptococcus neoformans (D) Histoplasma capsulatum 2. Which fungus causes thrush? (A) Candida albicans (B) Aspergillus niger (C) Mucor (D) Sporothrix schenckii 3. Which fungal infection is called “valley fever”? (A) Histoplasmosis (B) Blastomycosis (C) Coccidioidomycosis (D) Sporotrichosis 4. The causative agent of histoplasmosis is: (A) Histoplasma capsulatum (B) Blastomyces dermatitidis (C) Coccidioides immitis (D) Aspergillus flavus 5. Which fungus is known as “bread mold”? (A) Aspergillus (B) Rhizopus (C) Candida (D) Penicillium 6. Which fungus produces aflatoxins? (A) Aspergillus flavus (B) Candida albicans (C) Mucor (D) Sporothrix schenckii 7. Which stain is commonly used to detect fungi in tissue? (A) Ziehl-Neelsen stain (B) India ink stain (C) Periodic acid-Schiff (PAS) (D) Gram stain 8. India ink preparation is useful for identifying: (A) Candida albicans (B) Cryptococcus neoformans (C) Aspergillus niger (D) Mucor 9. Which fungus causes “rose gardener’s disease”? (A) Sporothrix schenckii (B) Candida tropicalis (C) Aspergillus fumigatus (D) Trichophyton rubrum 10. The most common cause of fungal meningitis is: (A) Candida albicans (B) Cryptococcus neoformans (C) Aspergillus flavus (D) Histoplasma capsulatum 11. Dermatophytes infect mainly: (A) Blood (B) Bone (C) Skin, hair, and nails (D) Lymph nodes 12. The fungus responsible for tinea versicolor is: (A) Malassezia furfur (B) Candida albicans (C) Aspergillus niger (D) Trichophyton mentagrophytes 13. Which fungus causes blastomycosis? (A) Blastomyces dermatitidis (B) Histoplasma capsulatum (C) Sporothrix schenckii (D) Candida krusei 14. Which fungus causes mucormycosis? (A) Aspergillus fumigatus (B) Rhizopus and Mucor species (C) Candida albicans (D) Penicillium marneffei 15. The drug of choice for systemic candidiasis is: (A) Nystatin (B) Amphotericin B (C) Griseofulvin (D) Terbinafine 16. Which antifungal binds to ergosterol and forms pores in the fungal membrane? (A) Amphotericin B (B) Fluconazole (C) Griseofulvin (D) Flucytosine 17. Which fungus is dimorphic? (A) Candida albicans (B) Aspergillus flavus (C) Histoplasma capsulatum (D) Rhizopus 18. “Pseudohyphae” are characteristic of: (A) Candida albicans (B) Aspergillus fumigatus (C) Coccidioides immitis (D) Blastomyces dermatitidis 19. Which fungus causes chromoblastomycosis? (A) Fonsecaea pedrosoi (B) Aspergillus fumigatus (C) Candida albicans (D) Mucor 20. The fungus associated with pigeon droppings is: (A) Candida albicans (B) Cryptococcus neoformans (C) Aspergillus niger (D) Blastomyces dermatitidis 21. Which antifungal inhibits ergosterol synthesis? (A) Fluconazole (B) Amphotericin B (C) Nystatin (D) Flucytosine 22. Which fungus has “spaghetti and meatballs” appearance in microscopy? (A) Malassezia furfur (B) Candida albicans (C) Aspergillus flavus (D) Trichophyton rubrum 23. Which fungus causes farmer’s lung? (A) Aspergillus fumigatus (B) Candida albicans (C) Rhizopus (D) Cryptococcus neoformans 24. Which fungus is used in penicillin production? (A) Aspergillus flavus (B) Penicillium notatum (C) Candida albicans (D) Rhizopus 25. Which fungus causes white piedra? (A) Trichosporon beigelii (B) Malassezia furfur (C) Candida albicans (D) Aspergillus niger 26. Which fungus causes black piedra? (A) Piedraia hortae (B) Trichophyton rubrum (C) Malassezia furfur (D) Candida tropicalis 27. Which fungus causes mycetoma? (A) Madurella mycetomatis (B) Aspergillus flavus (C) Candida krusei (D) Mucor 28. Which fungus is known as desert fungus? (A) Coccidioides immitis (B) Blastomyces dermatitidis (C) Aspergillus fumigatus (D) Cryptococcus neoformans 29. Which antifungal is effective against dermatophytes? (A) Griseofulvin (B) Amphotericin B (C) Nystatin (D) Flucytosine 30. Which fungus produces “germ tubes”? (A) Candida albicans (B) Aspergillus flavus (C) Cryptococcus neoformans (D) Histoplasma capsulatum 31. The fungus causing opportunistic infection in AIDS patients is: (A) Candida albicans (B) Cryptococcus neoformans (C) Pneumocystis jirovecii (D) All of the above 32. Which fungus was formerly classified as protozoa but is now recognized as a fungus? (A) Pneumocystis jirovecii (B) Cryptococcus neoformans (C) Candida glabrata (D) Trichophyton rubrum 33. Which fungus causes tinea capitis? (A) Trichophyton tonsurans (B) Aspergillus fumigatus (C) Candida albicans (D) Malassezia furfur 34. Which fungus causes tinea corporis (ringworm)? (A) Trichophyton rubrum (B) Candida albicans (C) Aspergillus flavus (D) Sporothrix schenckii 35. Which fungus causes tinea pedis (athlete’s foot)? (A) Epidermophyton floccosum (B) Candida albicans (C) Malassezia furfur (D) Aspergillus niger 36. Which fungus causes tinea cruris (jock itch)? (A) Trichophyton rubrum (B) Candida tropicalis (C) Malassezia furfur (D) Aspergillus flavus 37. The fungus causing keratitis in contact lens users is: (A) Fusarium species (B) Aspergillus flavus (C) Candida albicans (D) Trichophyton mentagrophytes 38. Which fungus is associated with “fungus balls” in the lungs? (A) Aspergillus fumigatus (B) Candida albicans (C) Histoplasma capsulatum (D) Sporothrix schenckii 39. The fungus responsible for penicilliosis is: (A) Penicillium marneffei (B) Aspergillus flavus (C) Candida albicans (D) Rhizopus 40. Which fungal infection is endemic in the Ohio and Mississippi River valleys? (A) Blastomycosis (B) Histoplasmosis (C) Sporotrichosis (D) Cryptococcosis 41. Which fungus is described as having “broad-based budding yeast”? (A) Blastomyces dermatitidis (B) Candida albicans (C) Histoplasma capsulatum (D) Coccidioides immitis 42. Which fungus has spherules containing endospores? (A) Histoplasma capsulatum (B) Coccidioides immitis (C) Blastomyces dermatitidis (D) Candida albicans 43. Which fungus produces septate hyphae with acute angle branching? (A) Aspergillus fumigatus (B) Mucor (C) Rhizopus (D) Candida albicans 44. Which fungus produces non-septate hyphae with right-angle branching? (A) Mucor (B) Aspergillus (C) Candida (D) Trichophyton 45. Which fungal infection is also called “San Joaquin Valley fever”? (A) Histoplasmosis (B) Blastomycosis (C) Coccidioidomycosis (D) Sporotrichosis 46. Which fungus is most commonly isolated from otomycosis (ear infection)? (A) Aspergillus niger (B) Candida albicans (C) Trichophyton mentagrophytes (D) Rhizopus 47. Which fungus causes kerion (inflammatory type of tinea capitis)? (A) Microsporum canis (B) Candida albicans (C) Aspergillus fumigatus (D) Sporothrix schenckii 48. Which antifungal is used topically for oral thrush? (A) Nystatin (B) Amphotericin B (C) Ketoconazole (D) Griseofulvin 49. Which fungus is associated with “desert rheumatism”? (A) Coccidioides immitis (B) Histoplasma capsulatum (C) Cryptococcus neoformans (D) Blastomyces dermatitidis 50. Which fungus causes allergic bronchopulmonary mycosis in asthmatics? (A) Aspergillus fumigatus (B) Candida albicans (C) Cryptococcus neoformans (D) Sporothrix schenckii