Answer: Trypomastigotes and intermediate trypomastigote/amastigote forms of Trypanosoma cruzi. Thanks to everyone who wrote in for this case! This was, admittedly, a tricky case, since it is uncommon to see amastigote-type forms in peripheral blood. The reason these atypical forms were present is because this specimen was grown in culture and then innoculated in peripheral [...]
The following were seen on a Giemsa-stained thick blood film made from EDTA whole blood. Identification?
Answer: You should advise him that this is not an Ixodes scapularis tick, which is the agent of Lyme disease, as well as babesiosis and anaplasmosis. Instead, it is a Dermacentor tick, which can transmit Rocky Mountain spotted fever. Unlike I. scapularis, Dermacentor spp. ticks have a “chalise-shaped” anal groove and festoons (not well visible [...]
Welcome back to Case of the Week! It’s been a while since our last post due to the holiday, but now we’re back on schedule with a fun video for you: The following insect was removed from the flank of a Medical Resident from Minnesota who had mistaken it for a ‘mole’ or ‘skin tag’. [...]
Question 1. Malaria due to Plasmodium malariae infection. Notice that there is no stippling present, and that the infected red blood cells are the same size or slightly smaller than the neighboring uninfected cells. Also shown here are the ‘classic’ stages of P. malariae in peripheral blood. Question 2. From top to bottom, the forms [...]
The following images were taken from a Giemsa-stained peripheral blood smear. The different stages of the organism shown represent a single species, and each stage is characteristic for this species. The stages are so characteristic, in fact, that each has an ‘unofficial’ name (e.g. nick-name) or description. Question 1 – What organism (genus and species) [...]
© pathtalk.org || Terms of use.