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The genus "Neisseria" is named after the German bacteriologist Albert Neisser, who in 1879 discovered its first example, "Neisseria gonorrhoeae", the pathogen which causes the human disease gonorrhea. Neisser also co-discovered the pathogen that causes leprosy, "Mycobacterium leprae". These discoveries were made possible by the development of new staining techniques which he helped to develop.