At school and even in the university you have learnt that Mister X or Mister Y is the inventor of antibiotics.
On line documents confirm that hoax !!!

126 k documents with » invention of antibiotics « !!!
Bacterias invented antibiotics
In fact, many antibiotics are initially » invented » by bacterias :
Tyrothricin, streptomycin, anisomycin, bacitracin, geldamycin, hygromycin B, ionomycin, kanamycin, kasugamycin, mytomycin C, nisin, oligomycin, natamycin, spiramycin, surfactin, tunicamycin, vancomycin and many others.
This matter is very important !
The scenario of phage therapy is said to compete with the scenario of antibiotics as synthetic molecules.
The reality is that it is a competition between a scenario with natural molecules and and a scenario with beneficial viruses !!!
References
French WikiPédia : List of antibiotics