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November, 2004
Case 143:
A 45-year-old man, HIV positive, went to his health care provider with
complaints of abdominal cramping, occasional watery diarrhea, and
noticeable weight loss. The physician ordered an ova and parasites
(O & P) examination. Fecal smears were
prepared from formalin-fixed stools, stained by different techniques
including Chromotrope 2R, and examined by a reference lab. The objects
seen in Figures A-C are what was observed on the Chromotrope
2R stained
smear at 1000× magnification.
What is your diagnosis? Based on what criteria? What, if any,
further examinations with other staining techniques would you recommend?
Click
here for the answer to Case 143.
Case 144:
A 29-year-old female from the West Indies was visiting relatives for a
few months in
the Midwest. After several weeks she began to experience fevers,
headache,
and occasionally insomnia. Her relatives took her to the emergency
room of the local hospital where she explained that she had malaria about
one year previous and thought that she may be experiencing a relapse.
Thick and thin blood films were made, stained with Giemsa, and examined.
Nothing reportable was observed on a thin film; the objects seen in
Figures A-C were observed on the thick film at 1000× magnification.
The objects were approximately 180–190 micrometers long. What is
your diagnosis? Based on what criteria?
Click
here for the answer to Case 144.
Images presented in the monthly case studies are from specimens submitted
for diagnosis or archiving. On rare occasions, clinical histories
given may be partly fictitious.
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