This week's interesting case was donated by Dr. Karine Thievierge and Alexandra. The following structures were seen in a stool specimen. They measure between 110 - 140 micrometers in length, by 75 - 90 micrometers in width. Identification?
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15 comments:
At first it looked a little bit like a hookworm egg, but it’s too large and doesn’t look right to me. I think it is probably an artifact possible pollen.
Paragonimus?
Eggs of Ancylostoma or Necator ? well but we can't really see the blastomeres in this case. humm a little tricky.
??mite egg
Although it looks like nematode eggs however i think it is more like an arthropod egg A mite egg.
Acari (or mite) egg. Size matters!
The morphology is similar to Trichostrongylus, yet these are about 90 nm. Let’s see if anyone has a better diagnosis.
Florida Fan
mite egg
Mite egg. Not developed to the point of identification, could be parasitic or environmental.
Mite egg. Image 2 upper left part:
? Let's bud
Image 3.: Right side- ? Cephalic end.
My best guess would be some kind of mite egg. Would report as "parasites not seen" as this does not resemble any known parasite ova.
All I can say is that it doesn't look like pollen to me.
As the embryo can't be seen within the egg, it is difficult to know to which group of animal these egg(s) belong. Sentimentally(?!), I think it is a mite egg. According to Wikipedia the size of mite eggs vary between 100 and 750 μm. In the publication of Kucerova & Stejskal (2009), who measured eggs of different stored food mites, reported that their size is about 115-155 μm and their width 67-110 μm. Therefore, I have reasons to believe that it should be the eggs of any stored food mite, which the individual ingested it with his/her food and the eggs passed with the feces. It could hardly be the eggs of a parasitic mite, as those of Scabies are inside the burrows and those of Demodex folliculorum inside the follicles (and a in an arrow shape!).
Mite egg
Mites egg seems plausible. In the second picture, on the upper side magnified enough there is a straight stick like structure. Is it part of a leg or antenna? The inner structure appears to have a junction of cephalic and abdominal parts. Thanks to everyone who suggested this identification.
Florida Fan
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