Creepy Dreadful Wonderful Parasites

This week's amazing case was donated by Dr. Sue Whittier. The patient had cooked salmon and eaten it with her family. It was then refrig...

Answer: anisakid larva, most likely Pseudoterranova species. This case is a dramatic example of what you can find if you don't cook yo...

This week's case was generously donated by Dr. Kamran Kadkhoda. This arthropod was found on a young girl near Winnipeg, in Manitoba, Can...

Answer: Dermacentor sp. tick, adult male Wow, lots of great discussion on this case! Thank you readers for providing the identification ke...

This week's case is from my own lab, with the beautiful images taken by Emily F. The patient is an asymptomatic male who underwent routi...

Answer: Trichuris trichiura (whipworm) As pointed out by Arthur V and the other readers, the shape of the adult worms (narrow anterior end...

This week's case was generously donated by Florida Fan. This structure was found in a concentrated stool specimen from a teenage male. I...

Answer: Hymenolepis nana egg As pointed out by Sheldon, BW, and Anon, this is a beautiful example of an H. nana egg, with refractile inter...

Happy Independence day to all of my American readers! Here is some red (magenta), white and blue for you - found in a modified acid fast-sta...

Answer: Cystoisospora (formerly Isospora ) belli As pointed out by the readers, these are immature oocysts, since only 1 sporoblast is vis...