Friedrich August Johannes Löffler

June 24th

Born on June 24, 1852; died on 9 April 1915 at the age of 62.

The German microbiologist, who discovered the diphtheria-causing organism, Corynebacterium diphtheriae, was first observed by German physiologist Theodor Klebs in Diphtheria patient’s throat. Isolation and culturing purely cultures involves some serious technical problems; Löffler realized there was a need to develop a new thick, medium serum, as the conventional gelatin used by Robert Koch required too low a temperature for the diphtheria pathogen.

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