Julius Richard Petri (May 31, 1852 – Dec 20, 1921) was a German bacteriologist who is to a greater extent than oft than non credited amongst inventing the Petri dish while working every bit assistant to Robert Koch.
Petri showtime studied medicine at the Kaiser-Wilhelm-Academy for Military Physicians (1871–1875) as well as received his medical flat inwards 1876. He continued his studies at the Charité Hospital in Berlin and was on active duty every bit a nation of war machine doctor until 1882, continuing every bit a reservist.
From 1877 to 1879 he was assigned to the Imperial Health Office (German: Kaiserliches Gesundheitsamt) in Berlin, where he became an assistant to Robert Koch. On the advice of Angelina Hesse, the New York-born married adult woman of or hence other assistant, Walther Hesse, the Koch laboratory began to civilization bacteria on agar plates. Petri as well as hence invented the criterion civilization dish, or Petri plate, as well as farther developed the technique of agar civilization to purify or clone bacterial colonies derived from unmarried cells. This advance made it possible to rigorously lay the bacteria responsible for diseases.