Alexandre Yersin’s profile picture

Alexandre Yersin

Discoverer of Yersinia Pestis
Alexandre Yersin’s profile picture
Net worth 2018: Under Review
Industry: Scientists
Residence: Aubonne, Canton of Vaud, Switzerland
Country: Swiss, French
BirthDay: 22 September 1863
Sigh: Libra
Died On: March 1, 1943

Alexandre Yersin was bornon 22 September 1863 in Aubonne, Canton of Vaud, Switzerland, Swiss, French, is Discoverer of Yersinia Pestis. Alexandre Émile John Yersin, popularly known as Alexandre Yersin was a Franco-Swiss bacteriologist. He is best remembered for discovering the bubonic plague bacillus, ‘Pasteurellapestis’, which is now known as ‘Yersinia pestis’. With his persistent effort, he helped to eradicate an epidemic disease like the plague that claimed lives of millions of people over the century. A nature lover and bright student since childhood, he spent most of his life in France and French Indochina, researching the bubonic plague. Together with fellow bacteriologist Émile Roux, Albert Calmette and Amédée Borrel, he prepared the first ever anti-plague serum to combat the disease. Later on, based on his research in this field, further investigation was directed towards antiserum treatment, use of antibiotics, and the deterrence of infection through the improvement of vaccines. These measures eventually led to the complete eradication of plague. The technique he used to make the discovery is relevant even to this day and is often used by scientists whenever they are confronted with a new contagious disease. In the last few years, a similar approach has been adapted to study the treatment and cure of diseases like AIDS, SARS, Chikungunya, and more recently, the Ebola virus.


He later attended the University of Marburg and the Paris Faculty of Medicine in the late 1980s


He died at his home in Nha Trang, Vietnam, on 1 March, 1943, during World War II


In 1934, he was nominated Honorary Director of Pasteur Institute and a member of its Board of Administration


At Honba in 1915, he tried to cultivate the quinine tree imported from South America, as quinine had malaria healing properties


He helped to establish the Hanoi Medical University in 1902 and became the institute’s first medical director, holding office for the next two years


He tried the serum received from Paris in Canton and Amoy in 1896 and in 1897 he tried the same in Bombay, India, as well but got unsatisfactory results


From 1895 to 1897, he continued his research on the bubonic plague


In 1894, he discovered the pathogen that causes plague


In 1890, he served as a physician aboard steamships operating off the coast of French Indochina


In 1889, together with Roux, he isolated a toxin secreted by the diphtheria bacillus (bacterium) and revealed that the toxin, and not the microorganism, was the main cause of the disease


In 1888, he received his PhD degree submitting a thesis titled ‘Étudesur le Développement du Tubercule Expérimental’ following which he spent a couple of months with Heinrich Hermann Robert Koch in Berlin and continued his studies on the tubercle bacillus


In 1886, upon an invitation by Roux, he joined the Louis Pasteur's research laboratory of École Normale Supérieure


Yersin was born on September 22, 1863 in Aubonne, Canton of Vaud, Switzerland

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