1 янв 1928 г. - Fredrick Griffith conducts an expirement and discovers bacteria transformation

Описание:

Griffith injected heat-killed S into mice, as expected, no disease ensued. When mice were injected with a mixture of heat-killed S and live R, however, pneumonia and death ensued. The live R had transformed into S—and replicated as such—often characterized as Griffith's Experiment. More accurately, point six of Griffith's abstract reports that R tended to transform into S if a large amount of live R, alone, were injected, and that adding much heat-killed S made transformation reliable[1] Griffith also induced some pneumococci to transform back and forth.