“…It may present as FUO and involve visceral organs such as liver, spleen, bone, heart, and lungs. 7,[14][15] Therefore, it is important to obtain a detailed history in patients who present with FUO. Bartonella rarely grows on routine bacterial cultures and if tests such as special stains (Warthin-Starry or Steiner or Dieterle stain), serology for Bartonella, or PCR on tissue and/or blood are not sent, diagnosis may remain elusive.…”