An elderly patient with pneumonia on a ventilator produces a gelatinous dark red sputum sample from which an encapsulated gram-negative rod is isolated.  The organism is non-motile, VP positive, and produces an A/A reaction on TSI with gas.  This organism is most likely:

The stage of Strongyloides stercoralis most commonly identified in the stool is the (M50-5; Level 2):

Listen carefully as I spell two vocabulary words. Write the words in the box below. Be sure to number your responses. If you need special characters, feel free to copy from these: á é í ó ú ñ ¿ ¡  

All of the following help to differentiate Trichophyton mentagrophytes and Trichophyton rubrum EXCEPT (M59-14;  Level 2):

A culture is taken from a nodule near a puncture wound on a gardener’s forearm.  A mold at room temp showed septate hyphae with a daisy-flower conidia arrangement.  At 37°C this culture produced cigar-shaped yeast.  This organism is most likely (M60-10, 15, 17, 21; Level 3):    

On the Thiosulfate-citrate-bile-salts-sucrose (TCBS) agar, colonies of Vibrio cholera:

The most common cause of Madura foot (a eumycotic mycetoma) in the USA is (M61-20; Level 1)?

Which of the following dermatophytes produces an ectothrix hair infection (M59-4, 7, 13, 21; Level 1):

A 24 year old was seen at a clinic with a chief complaint of weight loss and fever.  A complete blood count confirmed he was anemic.  Multiple skin lesions were present on his arms with some developing draining pus.  A gram stain of the pus revealed what appeared to be yeast-like cells.  A culture of the pus grew a green mold, which produced a red soluble pigment on the agar.  The most likely causative agent is (M60-17, 21; Level 3):

Reagents for the direct examination of skin, hair, and nails should contain ________ for digestion of keratin (M58-14; Level 1):