Well that's exactly what happened on 28 September 1928, when Sir Alexander Fleming, a Scottish microbiologist, found a substance called penicillin that transformed the history of medicine.
Amoxicillin and penicillin treat many of the same bacteria, but amoxicillin is often the medication of choice for streptococcal pharyngitis (strep throat) because it is just as effective as penicillin ...
In rod-shaped Escherichia coli, two conserved sets of machinery are essential for cell-wall insertion in the cylindrical part of the cell: the Rod complex and the class-A penicillin-binding proteins ...