Exam 22: Pathogenic Fungi

An elderly woman is experiencing fever,chest pain,difficulty breathing,and a cough that occasionally brings up mucus containing blood.She reports having visited family in rural New Mexico over the Labor Day weekend.A GMS-stained sample from her lungs shows the presence of large spherules.Which of the following is the most likely infecting agent?

Dermatophytes,which live on the surface of the skin,are always pathogenic.

Which of the following produces a hallucinogenic toxin?

Psilocybin is a

The true pathogenic fungi responsible for systemic mycoses have (dimorphic/monomorphic/polymorphic)growth characteristics.

The most common disease diagnosed in humans that is caused by Cryptococcus is

What is the diagnostic structure produced by Paracoccidioides brasiliensis?

Ringworm is a type I hypersensitivity response to fungus spores.

All of the true pathogen fungi discussed in this chapter are

Most mycoses are difficult to treat because

Factors that contribute to difficulty in eliminating fungal infections via the body's defenses include

Exposure to (Aspergillus/Candida/Microsporum)species most commonly causes allergies.

The best strategy for preventing fungal disease is (avoidance/prophylatic treatment/vaccination).

A sample of the tissue from an inflamed,pus-filled area on the lower leg is treated with KOH and stained with GMS.Under the microscope golden brown spheres are visible.With what disease are these observations consistent?

White patches on the surface of the tongue and the oral mucosa accompanied by inflammation and swelling are signs consistent with

A man has difficulty breathing,a cough,and is running a fever.He is an avid bird-watcher who recently visited a rookery where thousands of birds build their nests and raise their young.What fungal infection(s)might he have contracted? What diagnostic tests would confirm the diagnosis? What treatment might be prescribed?

Which of the following fungal infections was extremely rare prior to the AIDS epidemic?

Ergometrine,which is used to stimulate labor contractions,is a product of

Why are subcutaneous mycoses uncommon?

The seriousness of Coccidioides infection can be attributed to the formation and rupture of spherules.