Louis-Charles Malassez

Louis-Charles Malassez (21 September 1842 – 22 December 1909) was a French anatomist and histologist born in Nevers, department of Nièvre.
He studied medicine in Paris, where he worked as an "interne" from 1867. He served with the 5th Ambulance Corps during the Franco-Prussian War, afterwards returning to Paris, where he worked with distinguished physicians that included Claude Bernard, Jean-Martin Charcot and Pierre Potain. In 1875, he attained the chair of anatomy at Collège de France, and in 1894, became a member of the "Académie de Médecine".
He conducted histological research of the blood, and is credited for design of the hemocytometer, a device used to quantitatively measure blood cells. In the field of dentistry, he described residual cells of the epithelial root sheath in the periodontal ligament. These remaining cells are referred to as epithelial cell rests of Malassez (ERM).
A genus of fungi called "Malassezia" bears his name. The species in the genus include: "Malassezia furfur", "Malassezia ovalis", "Malassezia pachydermatis", "Malassezia sympodialis" and "Malassezia orbiculare". "Malassezia furfur" is a lipophilic species that forms on human skin and can cause seborrheic dermatitis and tinea versicolor, "Malassezia pachydermatis" is a species that is associated with otitis externa in dogs.