Design an experiment to increase the virulence and pathogenicity of Streptococcus pneumoniae (Hint:

Design an experiment to increase the virulence and pathogenicity of Streptococcus pneumoniae (Hint: S. pneumoniae that is transferred for several passages in vitro loses its capsule and virulence for mice.) Would an increase in virulence confer a selective advan- tage for the organism? Be sure to consider the natural habitat ...