Fyodor Alexandrovich Lesh, alternatively spelled as Lösch (russian: Фёдор Александрович Леш) (1840–1903), was a Russian Empire medical doctor. He is credited with identifying ''Amoeba coli'' in 1875. This species was later classified in the genus Entamoeba.

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1840 births 1903 deaths Physicians from the Russian Empire {{Russia-med-bio-stub