Case of the Week 48
Objects such as those shown below were seen in a urine specimen submitted for examination. According to the patient, he had passed several of these objects in his urine. Possible identification?
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Answer to Case of the Week 47
Answer: tracks left by Strongyloides stercoralis larvae. In this “culture” technique, stool is typically placed on a beef extract agar plate and incubated at room temperature. If Strongyloides stercoralis larvae are present, they will move out of the stool specimen, dragging bacteria with them. What we’re actually seeing in this case the bacteria growing in [...]
Case of the Week 47
The following larval tracks were seen on an agar plate that had been inoculated with the sputum of an immunocompromised patient from Kentucky. What parasite should you be concerned about? (Tracks are viewed using 4x objective)
Answer to Case of the Week 46
Answer: Trophozoites of Giardia lamblia (aka. G. intestinalis, G. duodenalis) As many of you guessed, these organisms were most likely picked up in the duodenum when the endoscope was threaded through the small bowel to get access to the pancreatic cyst. I don’t know of any reports where Giardia trophozoites actually inhabited a location other [...]
Case of the Week 46
The following were an unexpected finding from an ultrasound-guided endoscopy and FNA of a pancreatic cyst. Giemsa stained, 400x and 600x.
Answer to Case of the Week 45
Answer: Pinworm (Enterobius vermicularis) infection. As Anonymous mentions, there is both a male and female in the top image. The male is much smaller and has a curved tail. Besides the characteristic location (appendix and cecum), there are several features that allow for identification of these worms. First, the largest worms measure 1 cm or [...]
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