Image Quiz

The blood film shows macrophages containing Leishmania amastigotes, each with a prominent kinetoplast (seen as a darkened spot next to the larger nucleus) and no flagella (in contrast with the promastigote form). Infection with Leishmania spp is mostly asymptomatic; when infection is symptomatic, it may present as a cutaneous, mucocutaneous or visceral syndrome depending on the parasite species as well as host factors. Neisseria gonorrhoeae are gram-negative diplococci. Plasmodium falciparum trophozoites mature in erythrocytes and have a characteristic ring-form appearance. Schistosoma spp and Trypanosoma spp (with the exception of T. cruzi, which has an intracellular amastigote form) are extracellular protozoans.

Christina Yek, Cambridge University School of Clinical Medicine

Quiz Image:
Which of the following microorganisms is shows in the blood film?