Question

Application Based Questions :
Study the flow chart given below and answer the questions that follow
(a) S-strain $\to$ into mice - mice die
(b) R-strain $\to$ into mice - mice live
(c) Heat-killed S-strain + live R-strain $\to$ into mice $\to$ A
(d) Heat-killed S-strain + DNAase + live R-strain $\to$ into mice $\to$ B
Name the organism and differentiate between its two strains R and S respectively.

Answer 1

Diplococcus pneumoniae (pneumococcus); S-strain is capsulated and virulent, whereas non-encapsulated R-strain is non-virulent.