Answer to Case
This case represented a mixed infection with
Cyclospora sp. and
sp. Diagnostic morphologic features shown in the figures were:
- a size range for the unstained
objects which was consistent with
Cyclospora sp. (blue arrow,
- unstained oocysts with a
wrinkled appearance in the modified acid-fast stain, another
characteristic of Cyclospora
sp. All of the oocysts shown in this case were
unstained, which is not uncommon.
- a size range for the stained objects
was consistent with
Cryptosporidium sp. (red
arrow, Figure A).
- the presence of
sporozoites in some of the
Morphology can only identify
to the genus level. Molecular testing (PCR) of appropriate specimens
should be performed to identify the parasites to the species level.
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