A patient presenting with mild abdominal pain and proglottid…

A patient presenting with mild abdominal pain and proglottids in the feces. The ova & parasite exam demonstrates a yellow-brown egg measuring 33 um that is surrounded by a thick wall with radial striations.  Internally a six-hook oncosphere is visible. The most likely identification is (M53-4, 10, 11; Level 3):

A neonatal blood culture collected through a catheter grows…

A neonatal blood culture collected through a catheter grows a small yeast.  The direct microscopic exam shows a mixture of hyphae and blastoconidia.  The blastoconidia are round at one end with a bud-like structure at the other.  The organism did not grow on routine Sabouraud Dextrose agar until oil was added.   The agent of this infection is most likely (M62-17, 21; Level 3):

The infective larvae of Strongyloides stercoralis penetrates…

The infective larvae of Strongyloides stercoralis penetrates the skin and migrates through the circulatory system to the heart and lungs. The organism enters the bronchial tree and is then swallowed, entering the digestive tract, where the organism matures into an adult worm. The common name of this parasite is the (M50-9; Level 1)?