BMS 127 Ch. 22 Pathogenic Fungi Flashcards
Of the following fungi, which is usually transmitted from person to person?
a. Blastomyces dermatitidis
b. Coccidiodes immitis
c. Tricophyton rubrum
d. Aspergillus fumigatus
c. Tricophyton rubrum
A fungus that can infect both healthy and immunocompromised patients is called
a. true pathogen.
b. an opportunistic pathogen.
c. a commensal organism.
d. a symbiotic organism.
a. true pathogen.
Which of the following is not used to identify true fungal pathogens?
a. growth at 25 degrees C and 37 degrees C to show dimorphism
b. GMS staining of infected tissues
c. serological testing
d. clinical symptoms alone
d. clinical symptoms alone
Because amphotericin B is extremely toxic to humans, most clinicians prescribe it only for
a. dermatophyte infections.
b. Malassezia infections.
c. systemic infections.
d. black peidra
c. systemic infections.
Ringworm is caused by
a. helminth
b. dermatophyte
c. dimorphic fungus
d. commensal fungus
b. dermatophyte
Which of the following is considered a classical opportunistic fungus?
a. Piefraia hortae
b. Histoplasma capsulatum
c. Fonsecaea pedrosoi
d. Aspergillus niger
d. Aspergillus niger
Subcutaneous infections tend to be acquired through
a. inhalation and remain localized.
b. inhalation and become systemic.
c. trauma and remain localized.
d. trauma and become systemic.
c. trauma and remain localized.
The term dermatophyte refers to
a. pathogenicity.
b. where a fungus grows.
c. method of spread.
d. pigmentation.
b. where a fungus grows.
Which of the following subcutaneous mycoses may exhibit respiratory and cerebral forms?
a. chromoblastomycosis
b. mycetoma
c. phaeohyphomycosis
d. sporotrichosis
c. phaeohyphomycosis
Which of the following systemic mycoses is endemic to the deserts of the southwestern United States?
a. blastomycosis
b. coccidioidomycosis
c. histoplasmosis
d. paracoccidioidomycosis
b. coccidioidomycosis
A spherule stage is seen in humans infected with what organism?
a. Blastomyces dermatitidis
b. Coccidiodes immitis
c. Histoplasma capsulatum
d. Paracoccidiodes brasiliensis
b. Coccidiodes immitis
Of the following fungal diseases, which is found in almost all terminal AIDS patients?
a. chromoblastomycosis
b. blastomycosis
c. candidiasis
d. peidra
c. candidiasis
Which of the following predisposing factors would leave a patient with the greatest long-term risk of acquiring a fungal infection?
a. invasive medical procedures
b. AIDS
c. chronic illness such as diabetes
d. short-term treatment with antibacterial agents
b. AIDS
Fungal allergens generally stimulate what type of reaction?
a. type I hypersensitivity
b. type II hypersensitivity
c. type III hypersensitivity
d. type IV hypersensitivity
a. type I hypersensitivity
A pathogenic feature of Cryptococcus neoformans is
a. production of destructive enzymes
b. production of a capsule
c. infection of immune cells
d. variation of surface antigens to avoid immune system recognition
b. production of a capsule
The most common manifestation of Cryptococcus infection in AIDS patients is
a. blindness
b. cutaneous infection
c. meningitis
d. pneumonia
c. meningitis