<prompt> Treponema pallidum was discovered by:Hillary and MehoniHoffman and ShauddinWarren and MarshallYersin and Kitasato  <response>: Ans: b Hoffman and shauddin Ref: Ananthanarayan, 7th ed, p. 377Treponema pallidum was discovered by Hoffman and ShauddinWarren and Marshall discovered Helicobacter pylori PGI Dec 2007Yersin and Kitasato discovered plague bacilli 