Alexander Flemming was born August 6, 1881, Lochfield Farm, Darvel, Ayrshire, Scotland. Fleming was the seventh of eight children of a Scottish hill farmer, and he was bought up on the farm
He began his schooling at Loudoun Moor and then moved to a larger school at Darvel before enrolling in Kilmarnock Academy in 1894. In 1895 he moved to London to live with his elder brother Thomas and completed his basic education at Regent Street Polytechnic.
Fleming began his medical studies at St. Mary’s Hospital Medical School in 1901, funded by a scholarship. he won the 1908 gold medal as top medical student at the University of London. he planned to become a surgeon, but a position in the Inoculation Department at St. Mary’s Hospital convinced him that his future was bacteriology. There he came under the influence of bacteriologist and immunologist Sir Almroth Wright
In November 1921 Fleming discovered lysozyme, an enzyme present in body fluids such as saliva and tears that has a mild antiseptic effect. That was the first of his major discoveries. It came about when he had a cold and a drop of his nasal mucus fell onto a culture plate of bacteria. Realizing that his mucus might have an effect on bacterial growth, and a few weeks later saw signs of the bacteria’s having been dissolved.