Tropheryma whipplei is a type of bacteria that causes a rare disease known as Whipple's disease. This infection primarily affects the intestines but can also impact other organs, including the heart and brain. It is characterized by symptoms such as abdominal pain, weight loss, and diarrhea. The bacteria are typically found in the environment, but the exact mode of transmission is not well understood. Diagnosis often involves a biopsy of affected tissue, and treatment usually requires long-term antibiotics to effectively manage the infection and prevent complications.