Discovered by sheer accident in the late 1920s, penicillin was the world's first antibiotic. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

THE method described by Brieger and Cosslett 1 of growing tubercle bacilli on the ‘Formvar’ film of a stainless steel electron microscope grid has been modified for use with liquid media. In this form ...