Similar to the Pasteur Institute in Paris, the vaccination Department at St. The place where A. Fleming worked existed and received funding for research through the sale of vaccines. The scientist found that during the preparation of vaccines, penicillin protects cultures from Staphylococcus. This was a small, but serious achievement, and A. Fleming widely used it, weekly giving instructions to make large batches of broth based on penicillin. He shared samples of Penicillium culture with colleagues in other laboratories, but, oddly enough, a. Fleming did not take the obvious step taken 12 years later by H. W. Flory to determine whether experimental mice would be saved from a deadly infection if treated with penicillin broth injections. Looking ahead, let’s say that these mice were exceptionally lucky. A. Fleming only prescribed broth to several patients for external use. However, the results were very, very contradictory. The solution was not only difficult to clean in a significant volume, but also proved unstable. In addition, A. Fleming never mentioned penicillin in any of the 27 articles or lectures he published in 1930-1940, even when they were about substances that cause bacterial death. However, this did not prevent the scientist from receiving all the honors due to him and the Nobel prize in physiology or medicine in 1945.

It took a long time before scientists concluded that penicillin was safe for both humans and animals.

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