Alexander Flemming. (№ 367858)

There will be times when anyone will be able to purchase penicillin in the store, so there is a danger that some ignorant people can easily take too small a dose and to grow a microorganisms under influence of low concentrations of drugs that are resistant to penicillin. Here's a hypothetical example. Mr. X with a sore throat. He buys some penicillin and takes it in a quantity insufficient to kill the streptococci but enough to teach him how to resist penicillin. He then infects his wife. She had an pneumonia, and it can be cured with penicillin. As the streptococci are now resistant to penicillin, the treatment is ineffective and Mrs X dies. Who was originally to blame for her death? Her husband, who neglect of penicillin changed the nature of the bacteria. The moral: if you are being treated with penicillin, use enough.