evidence in London in 1854 that cholera was spread from drinking water - a contagion, not miasma. Yet he could not identify the pathogens, which made most people still believe in the miasma origin.

V. cholerae was first observed and recognized under microscope by the French zoologist Félix-Archimède Pouchet. In 1849, Pouchet examined the stool samples of four people having cholera. His presentation before the French Academy of Sciences