Exam 27: Medically Significant Fungi

This organism was isolated from a sinus aspirate of a patient with chronic sinusitis and respiratory allergies. Identify the organism from the following:

A patient returning from a trip to tropical Africa comes to his physician noting scaly patches of skin along the waistband, which are lighter in color than his normal skin. A skin scraping reveals budding yeast and short septate hyphal elements, with some branching present. This organism, shown below, is most likely

All of the following organisms cause cutaneous mycoses, except

The following organism was isolated from the sputum culture of a cancer chemotherapy patient. This organism is most likely

Chromoblastomycosis is caused by all the following organisms, except

A young man notices a darkened area of skin on the palm of his hand. It seems to be increasing in size over the past 2 weeks. His health care provider collects a skin scraping for microscopic examination, which shows septate hyphal elements and budding cells. This organism is most likely

What is the causative agent of black piedra?

All of the following are examples of dimorphic fungi, except

A patient with very pale patches on his arms and legs is examined at his physician's office. His physician orders a fungal culture. The fungus shows a "spaghetti-and-meatball" appearance on the direct smear. What organism is it?

A bone marrow transplant patient develops an abrupt fever with respiratory distress. Despite treatment with antifungal medications, the patient dies on the fifth day. The following organism was isolated from both sputum and blood cultures. Identify the organism seen in the image below.

What is the causative agent of tinea nigra?

What organism is one of the primary opportunistic infections in AIDS patients?

This organism was isolated from a diabetic patient with a sinus infection. The mold was extremely fast growing with a dirty white surface. Microscopic observation revealed wide sparsely septate (aseptate) hyphae without rhizoids. This organism is most likely

For KOH to work properly, what is done to speed up the dissolution of the keratin and skin layers?

What organism frequently presents in fungus balls?

A Seattle woman with HIV complains of headaches and also displays some memory loss. Because of her history, the physician collects cerebrospinal fluid (CSF) and sends it to the laboratory for analysis. The following image is seen using India ink stain. What is the most likely identification of this organism?

The following organism was isolated from an immunocompetent patient with chronic sinusitis. This organism is most likely

The following organism is isolated from a case of tinea capitis. The organism grew rapidly producing tan mold colonies. This organism is most likely

A student working for the summer at a plant nursery has a nodular lesion on his forearm that develops a draining tract. The following organism is isolated from the culture at 22° C. Identify the organism from the following:

A recreational cave explorer develops a productive cough and fever. A sputum culture is sent to the laboratory for bacterial, fungal, and mycobacterial cultures. A white mold colony develops on Sabouraud dextrose agar after 5 days at 22° C. Identify the organism from the following: