Influenza, tertian fever, leprosy were all endemic, along with tapeworm and a mysterious intestinal infestation that made its victim long to eat earth.
On the coastal plains, three out of four cases are of the "benign tertian" variety caused by the parasite Plasmodium vivax, and only one case out of four is "malignant tertian .
Charles Louis Alphonse Laveran (1845-1922), French military surgeon, discoverer of Plasmodium vivax, germ of tertian malaria.