Here's another fun parasite histopathology case for you: a full-thickness section of bladder wall from an Egyptian man with invasive bladder cancer (not shown here):HERE for the whole digital slide.
This week's case is a lovely cross-section of an arthropod embedded within the epidermis. The patient is a middle-aged woman with a lesion on her foot after returning from the Caribbean on holiday. Here is a still image of the digital slide:
Answer to the Parasite Case of the Week 668: Tunga penetrans (likely one adult female flea) embedded in skin. Hopefully you all had a chance to look at the digital slide HERE. It is fun to zoom around on the slide and see the various features.
The follow photos show some of the key diagnostic features:
Answer to the Parasite Case of the Week 667: Ascaris lumbricoides.
This adult nematode is easy to identify when found in human stool, or expelled through the mouth, nose, or anus, due to its large size and characteristic 3 fleshy lips. Importantly, anisakid larvae also have 3 fleshy lips, and must therefore be differentiated from immature Ascaris when expelled from the human gastrointestinal tract. This can be accomplished by examining the characteristics of the intestinal tract, mouth and tail.