German microbiologists

Walther Kruse (September 8, 1864 – 1943) was a German bacteriologist who was a native of Berlin.
In 1888 he received his doctorate from Berlin, where he was a student of Rudolf Virchow (1821–1902). From 1889 until 1892 he worked as a bacteriologist in Naples, and in 1892 travelled to Egypt to perform research on dysentery. In 1893 he became an assistant to hygienist Carl Flügge (1847–1923) in Breslau, and in 1898 became an associate professor at the University of Bonn. Later he served as a full professor in Königsberg (1900), Bonn (1911) and Leipzig (1913).
Walther Kruse is remembered for his work in parasitology and his research of intestinal bacteria infections. He performed extensive studies of Shigella dysenteriae during an epidemic of dysentery in the Ruhr area of Germany. This organism is sometimes referred to as the "Shiga–Kruse bacillus", and its associated disease as "Shiga–Kruse dysentery". These eponyms are shared with Japanese bacteriologist Kiyoshi Shiga (1871–1957). Kruse documented his findings in a 1900 treatise titled Über die Ruhr als Volkskrankheit und ihren Erreger.
In 1914 he demonstrated that the common cold could be transmitted to healthy individuals via nasal secretions that were free of bacteria. The results of these experiments were published in a treatise called Die Erreger von Husten und Schnupfen (1914). A specialized tool used to spread material over the surface of a culture medium is called "Kruse's brush".

Emmy Klieneberger-Nobel (February 15, 1892 – September 11, 1985) was a German Jewish microbiologist and a founder of mycoplasma bacterial research. She performed most of her research at the Lister Institute in London, England, after having been expelled from Germany by the Nazis.

Hans Otto Friedrich Schlossberger (born 22 September 1887 in Alpirsbach, died 27 January 1960 in Stuttgart) was a German physician, who was known for his research in immunology, medical microbiology, epidemiology and antimicrobial chemotherapy, especially on syphilis, typhus, gas gangrene, diphtheria, erysipeloid of Rosenbach, tuberculosis, malaria and leptospirosis. He was one of the leading immunologists and bacteriologists of Germany during his lifetime, and was a student and collaborator of the Nobel laureates Paul Ehrlich and Emil von Behring, two of the principal founders of the field of immunology.
From 1946 to 1955, he was Professor of Medical Microbiology and Infection Control and Director of the Institute for Medical Microbiology and Infection Control at the Goethe University Frankfurt, and also served as Dean of the Faculty of Medicine 1952–1953. He edited the journal Medical Microbiology and Immunology and the influential book Experimental Bacteriology.

Julius Richard Petri (31 May 1852 – 20 December 1921) was a German microbiologist who is generally credited with inventing the device known as the Petri dish, which is named after him, while working as assistant to bacteriologist Robert Koch.