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[Last Modified: ] |
July, 2003
Case 111:
A man was seen by his physician for an uncomfortable, sporadic twitch of
his eyelids. Several years earlier the man had been to Nigeria and
had a worm
extracted from the surface of his eye. His
physician requested that a blood sample be collected and smears made and stained with Giemsa.
The stained slides were forwarded to CDC for confirmatory diagnosis. A few objects were observed,
ranging in
size from about 250 to 265 micrometers in length. Figures A and
B
show two of the objects on the thick film seen at 200× and 400×
respectively. Figures C and
D (depicting the anterior and posterior parts respectively) show
one of the objects seen at 1000× magnification. What is your diagnosis? Based on what criteria?
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| A | B |
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| C |
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| D |
Acknowledgement: This case was kindly provided by the Indiana University Hospital and the Indiana State Department of Health.
Click here for the answer to Case 111.
Case 112:
A 56-year-old man occasionally eats medium-rare cooked fish. One
evening the man felt something moving in his
mouth and, after he extracted it, discovered that it was a worm. He
visited his doctor to submit the worm for identification and because of
gastrointestinal symptoms. An ova and parasites (O and P) stool exam was
performed and the results were negative. Figure A shows an
image of the
entire worm taken without the aid of a microscope. The worm was
cleared using lacto-phenol to allow visualization of internal morphologic
structures. Figures B and C
(40× magnification) show the anterior and posterior ends of the worm respectively.
Arrows in Figures D
and E indicate a key diagnostic structure observed in a
cross-sectional sample. What is your diagnosis? Based on what criteria?
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| A |
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| B | C |
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| D | E |
Acknowledgement: This case was kindly provided by the Indiana State Department of Health.
Click here for the answer to Case 112.
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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