bar·ton·el·la \ˌbärtənˈelə\noun Etymology: New Latin, from A.L.Barton fl1909 Peruvian physician + New Latin -ella 1.capitalized: the type genus of Bartonellaceae including the causative organism of Oroya fever and verruga peruana in man 2.-ssometimes capitalized: any member of the genus Bartonella