Although the viral image does not depict one, the Demodex genus of mites are very real. Two species in the genus, Demodex folliculorum and Demodex brevis, do live on human faces and are ...

Entamoeba histolytica infects nearly 50 million people each year and kills around 70,000. It’s a shape-shifting parasite that invades the human gut, often causing mild symptoms like diarrhea.

Leishmaniasis is a parasitic disease that affects up to 1 million people worldwide each year. It is caused by the protozoan ...

Accumulating evidence suggests that a common single-celled parasite called Toxoplasma gondii may also be a contributor: An April 2025 study showed for the first time that “human sperm lose their heads ...

Parasites are known to infect human cells through a variety of ingenious mechanisms. Many of them have even evolved sophisticated strategies to evade a host’s immune system by avoiding it ...