 Tropheryma whipplei

Tropheryma whipplei, formerly called Tropheryma whippelii, is a bacterium and the causative organism of Whipple's disease and, rarely, of endocarditis.While "T. whipplei" is categorized with the Gram-positive Actinobacteria, the organism is commonly found to be Gram-positive or Gram-indeterminate when stained in the laboratory.