Theodor Albrecht Edwin Klebs (6 February 1834 – 23 October 1913) was a German-Swiss microbiologist. He is mainly known for his work on infectious diseases. His works paved the way for the beginning of modern bacteriology, and inspired Louis Pasteur and Robert Koch. He was the first to identify a bacterium that causes diphtheria, which was called Klebs–Loeffler bacterium (now Corynebacterium diphtheriae). He was the father of physician Arnold Klebs.
Karl Mellinger (26 November 1858, in Mainz – 21 May 1917, in Basel) was a German-Swiss ophthalmologist.
Mellinger studied medicine at the universities of Zürich and Basel until 1883, and afterwards worked as an assistant to ophthalmologists Johann Friedrich Horner in Zürich and Karl Stellwag von Carion at the University of Vienna. In 1889 he obtained his habilitation at Basel and was named head of the outpatient clinic. In 1896 he became an associate professor and successor to Heinrich Schiess-Gemuseus as head of the university eye clinic. Among his students and assistants at Basel were Alfred Vogt and August Siegrist. He is credited with introducing a specialized ring magnet (inner pole eye magnet) into ophthalmology.