penicillin
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GC: n

S: WHO – http://www.who.int/drugresistance/Microbes_and_Antimicrobials/en/ (last access: 10 May 2016); http://www.acs.org/content/acs/en/education/whatischemistry/landmarks/flemingpenicillin.html (last access: 10 May 2016).

N: 1. 1929, coined in English by Alexander Fleming (1881-1955), who first recognized its antibiotic properties, from Modern Latin Penicillium notatum (1867), the name of the mould from which it was first obtained, from Latin penicillus “paintbrush” (see pencil (n.)), in reference to the shape of the mould cells.
2. Penicillin, one of the first and still one of the most widely used antibiotic agents, derived from the Penicillium mold. In 1928 Scottish bacteriologist Alexander Fleming first observed that colonies of the bacterium Staphylococcus aureus failed to grow in those areas of a culture that had been accidentally contaminated by the green mold Penicillium notatum. He isolated the mold, grew it in a fluid medium, and found that it produced a substance capable of killing many of the common bacteria that infect humans.
3. Cultural Interrelation: We can mention The Third Man (1949) directed by Carol Reed (1906-1976).

S: 1. OED – http://www.etymonline.com/index.php?term=penicillin (last access: 10 May 2016). 2. EncBrit – http://global.britannica.com/science/penicillin (last access: 10 May 2016). 3. http://www.imdb.com/title/tt0041959/ (last access: 10 May 2016).

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CR: bacterium, fungus, parasite, virus.