Every year scientists open more doo

Every year scientists open more doors that lead to the secrets of new drugs that help cure disease There is bacitracin, which was discovered by two scientists at Columbia University's College or Medicine. These two people. Dr. Frank Mcleney and Miss Balbina Johnson, knowing that the human body had some kind of action in itself with which i. lights infections, began to search for the chemical that does this. In the hospital they examined badly infected wounds of people who had been hurt in accidents and made tests of the blood and the infected part.
Finally, in the wound of a girl who had broken a leg bone, they found the useful germs (细菌) which seemed to be fighting the poisonous infection. They took some of these germs into the laboratory and from them developed cultures, that is, larger masses of the germs with which to experiment. At last, after long and painstaking work, they were able to draw from these germs a substance which is a germ destroyer. Dr. Meleney and Miss Johnson named il bactracin — baci because ihe germ is, in scientific language, a bacillus (芽孢杆菌) and tracin for Margaret Tracy, whose broken leg supplied the germ.
Bacitracin was first used only locally, later it was developed into a solution that can be used lo fight germs through the blood stream.