Fred Neufeld, a German bacteriologist, had discovered the pneumococcal types and serological typing; until Frederick Griffith's studies bacteriologists believed that the types were fixed and unchangeable from one generation to the next.
A German bacteriologist, Fred Neufeld, had discovered the three pneumococcal types (Types I, II, and III) and discovered the Quellung reaction to identify them in vitro.
Fred Astaire | Fred Frith | Fred Quimby | Fred Thompson | Fred Beckey | Fred MacMurray | Fred Willard | Fred Hersch | Fred | Fred Seibert | Fred R. Harris | Fred Olen Ray | Fred Neil | Fred Hoyle | Fred Flintstone | Fred Couples | Fred Noonan | Fred Wilson | Fred Upton | Fred Rogers | Fred Gwynne | Fred Williamson | Fred Van Lente | Fred Trueman | Fred Titmus | Fred Silverman | Fred Schneider | Fred Schepisi | Fred M. Vinson | Fred Lynn |