In 1927, he demonstrated the inhibitory action of the bacillus genus penicillium sp on the proliferation of the bacteria staphylococcus and streptococcus. Although, the discovery of penicillin has been attributed to Alexander Fleming, Picados' old laboratory notebooks from 1923 show records of the antibiosis of penicillium s
Penicillin is quite difficult to grow on a commercial scale. Once Fleming made his initial discovery, there was lots and lots of work to be done to 1) find high producing strains and 2) grow such a strain on an industrial scale.
A decade earlier is surely possible, 2 decades earlier may be pushing it.
The other thing is, the earlier you get penicillin the earlier you get antibiotic-resistance....