<prompt> The leather term is used forAnthraxProteusDiphtheriaNeisseria  <response>: Diphtheria was first recognized as a clinical entity by Bretonneau who called it diphtheria from diph-theros, meaning leather. The name is derived from the tough, leathery pseudomembrane formed in the disease. Reference: Textbook of Microbiology; Anathanarayan and panickers; 10th edition; Page no: 239 