For those interested in antibiotic history it's worth noting that sulfa drugs predate penicillin by a few years. Prontosil was the first practical antibiotic, d

For those interested in antibiotic history it's worth noting that sulfa drugs predate penicillin by a few years. Prontosil was the first practical antibiotic, developed in 1932; it's mentioned a few times in the All Creatures Great and Small books: https://en.wikipedia.org/wiki/Prontosil https://en.wikipedia.org/wiki/Prontosil The first antibiotic known to modern medicine was an anti-syphilis drug called Salvarsan: https://en.wikipedia.org/wiki/Arsphenamine https://en.wikipedia.org/wiki/Arsphenamine