Size: 27 µm Stage: [1] Most likely identification of the organism: [2]

Image Identification (complete scientific name AND life cycle stage) 25 μm, wet mount

 A 7-year-old boy was presented to his health care provider with symptoms of intermittent diarrhea, abdominal pain and loss of appetite. A stool specimen was collected in 10% formalin and zinc PVA (Zn-PVA) for routine ova-and-parasite (O&P) examination.  Figures A-D show what was observed at 1000x magnification with oil on a trichrome-stained smear made from stool preserved in the Zn-PVA.  The objects of interest measured 7-13 µm.  Figures A and B show the same object at different focal planes. What is your diagnosis? Based on what criteria? Provide extensive detail in order to receive full credit.

The usual site for human tapeworms is:

Which of the following organisms is most likely to be found in a corneal scraping specimen?

What is this object?  

Which of the following organisms produces “cigar bodies” in tissue?

Associate the correct characteristic with the given yeast: Geotrichum candidum

Blue-green fungal colonies were isolated from the sputum of a patient with arrested tuberculosis who had an unresolved cavitary lesion on X-ray. The fungus grew at 42ºC, and on an LPCB mount it looked like this: What is the most likely identity of this fungus?

The hair from a child with apparent ringworm of the scalp shows bright green fluorescence under a Wood’s lamp. Culture of the hair yielded a fungus with pectinate hyphae and no distinct conidial structures were seen. What is the most likely identity of the fungus?