Microscopy of mummified visceral tissue from a Medici family member in Italy identified a potential blood vessel containing erythrocytes. Giemsa staining, atomic force microscopy, and immunohistochemistry confirmed Plasmodium falciparum inside those erythrocytes. Our results indicate an ancient Mediterranean presence of P. falciparum, which remains responsible for most malaria deaths in Africa.
Keywords: Italy; Medici; Plasmodium falciparum; atomic force microscopy; immunohistochemistry; malaria; parasites; vector-borne infections; zoonoses.