For the preparation of viable log phase S. pneumoniae stocks, for the use in the in vivo infection experiments, a microbank bead was transferred to blood-agar plates (trypticase soy agar with 5% ...

A microbiologist at the Max-Planck-Institute for Infection Biology prepares a bacterial colony of the strain Streptococcus pyogenes, the primary species in group A strep, on a blood agar plate.