Different Strands Of Pneumococcal, An Injection Of Living R Strand Pneumococcal

1113 Words Jul 21st, 2015 5 Pages
Greetings to all tuning in to our new blog today, it is a fascinating time in the lab as we will subsequently follow up with Mr. Griffith’s publication in which he studied two different strands of pneumococcal, a bacterium that causes pneumonia in mammals. I want to quickly inform to our subscribers who are just tuning in to our lab blog what Mr. Griffith’s publication followed. Mr. Griffith studied two different types of genetic strands
(material) of pneumococcal, One of the strands, termed the S strain, was the disease causing agent and killed the host. The hosts used in Mr. Griffith experiments were mice and we note that living S strains from the pneumococcal bacteria could be extracted from the mice at post-mortem. The second strain, the R strain, was not pathogenic, disease causing agent, therefore an injection of living R strand pneumococcal did not kill the mice. This is intriguing how could there be two different kinds of DNA? Let us continue to read on Mr. Griffith’s experiment to understand more what we will follow up on. The experiment then continues with the administration of the heat-killed bacteria (both S and R strains) into the host and neither of the 'dead ' strains have any effect on the mice; therefore, it is established that only the living S strain bacteria were deadly. The next step in the experiment it is said that incubated living R strains and heat-killed S strains are administered into mice and subsequently found that this mixture was deadly and…

Related Documents