This week's case features our monthly case from Idzi Potters and the Institute of Tropical Medicine, Antwerp. The following structure was seen in a urine sediment. No further history is available. Identification?
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Every week I will post a new Case, along with the answer to the previous case. Please feel free to write in with your answers, comments, and questions. Also check out my image archive website at http://parasitewonders.com. Enjoy!
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Please note that all opinions expressed here are mine and not my employer. Information provided is for educational purposes only. It is not intended as and does not substitute for medical advice. I do not accept medical consults from patients.
The Fine Print:
Please note that all opinions expressed here are mine and not my employer. Information provided is for educational purposes only. It is not intended as and does not substitute for medical advice. I do not accept medical consults from patients.
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9 comments:
Schistosoma hematobium with terminal spine
I'd be reluctant to call from just this image. It's reminiscent of an S. hematobium ovum, but with no protomiracidium (or whatever the hell you call it) inside. The thickening opposite the putative spine looks a lot like whatever we're calling the fish tapeworm this week; but the size and location are wrong, so that's just a random thought. I've never seen a post-hatching Schistosoma hematobium ovum, so I expect that's what this is, but I'd try to look for more.
This is definitely NOT Schistosoma haematobium. It is only measuring ~75um in length vs the expected 110-170um. Also, importantly S. haematobium eggs contain a mature miracidium when shed in urine. This has no internal structuring of the sort.
I agree with Marc. The size of the egg is definitely not consistent with S. haematobium (which are large, 110-170uM long and 40-70uM wide). Secondly, the structure lacks mature miracidium.
This structure is reminiscent of a fungal structure. It reminds me of an ascospore.
Thank you all for the guidance. As the weather starts to cool down for the fall, this case is a reminder for us to expect to recognize the incidental findings like this one, otherwise unlikely to encounter during the other seasons of the year. I agree that this object does not measure up to the size of a Schistosoma haematobium, nor does it contain an internal miracidium, as such this identification does not stand.
The other fact is that there is no clinical history. Old One, I agree with you that this is more than likely a mushroom ascospore. I will be reluctant to associate it with morel ascospores as my knowledge is only restricted to Clinical Mycology.
Florida Fan
Fungal spore.
not a parasite. no internal structure. Crystal?
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