Griffith found in his experiment that the following strain combination of Streptococcus pneumoniae strains was highly severe.
Live R strain + Heat-killed S
What was Griffiths experiment?
- Frederick Griffith performed one of the first tests to demonstrate that cells contain genetic material in 1928.
- Griffith's experiment used two pneumococcus strains: a deadly virulent strain (S) and a non-virulent strain (N) (R)
- Griffith infected mice with a non-virulent strain of bacteria (strain R) and found that they survived.
- Griffith used the pathogenic bacteria (strain S) to infect mice, and the mice died.
- Griffith infected mice with deadly bacteria (strain R) that had been heat-killed, and the mice survived because the bacterium had been killed.
Griffith discovered that mice infected with a mix of heat-killed strain S and live strain R died.
Griffiths deduced from this that the live R cells had been converted into pathogenic S cells.
learn more about Griffiths experiment here:
https://brainly.com/question/8950307
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