title: A small step for a mouse.
mesh_terms: D000818:Animals; D004739:England; D049673:History, 20th Century; D051379:Mice; D010406:Penicillins / Q000266:history* / Q000627:therapeutic use; D013290:Streptococcal Infections / Q000266:history* / Q000517:prevention & control
chemical_list: D010406:Penicillins