Monday, February 19, 2018

Case of the Week 482

This week's case was donated by Dr. Paul Green. The following worm was removed from the eye of a Nigerian man, and was noted to still be moving after removal:
 Although it was damaged during removal, the key diagnostic features are still visible.

Anterior end:

mid-body with disrupted area:

Closer look at the internal organs:


Posterior end:
Identification? What additional specimen could confirm your diagnosis?


Monday, February 12, 2018

Case of the Week 481

Happy Valentine's Day! Here is a special photo taken by Emily Fernholz, my awesome education specialist. These 2 little worms were found in a concentrated stool specimen and measure approximately 250 micrometers long.  Identification?


Sunday, February 11, 2018

Answer to Case 481

Answer: Strongyloides stercoralis rhabditiform larvae
As noted by Florida Fan and Sugar Magnolia, these 2 larvae are "intertwined in romantic interlude" - "performing a romantic ballet". Perfect for Valentine's day!

The identification can easily be made by the size of these nematodes, their short buccal cavities (arrows in image below), and the genital primordium (less easily appreciated here).

Monday, February 5, 2018

Case of the Week 480

Starting us off with the first Monday of February 2018 is another exciting case from Idzi Potters and the Institute of Tropical Medicine, Antwerp.

The patient is a 65 year old Spanish woman who brought 3 worm-like structures to her physician. She had expelled the structures 30 minutes prior to presentation, and one was noted to still be moving. She reports no travel outside of Europe.

...and here is the moving one!!



Sunday, February 4, 2018

Answer to Case 480

Answer: Taenia saginata proglottid

As mentioned by Luis, Florida Fan, Atiya, and Sugar Magnolia, these proglottids can be differentiated by other large tapeworms by the size and shape of the proglottids, and the presence of more than 12 uterine branches arising from the central uterine canal/stem:
 Remember when counting uterine branches to only count them as they come off the central stem (primary branches), and only on ONE side (not both)!
As some readers mentioned, the proglottids of Taenia saginata are morphologically indistinguishable from those of T. asiatica; however, the patient's lack of travel outside of Europe makes infection with this latter parasite unlikely. Thanks again to Idzi Potters and the Institute of Tropical Medicine, Antwerp, for this interesting case!