An 81-year-old woman who was taking prednisone and methotrexate for rheumatoid arthritis fell and fractured her hip. She received two units of leukocyte-reduced RBCs. Nine days later, she presented with fever, myalgias, and pancytopenia. She developed disseminated intravascular coagulopathy with multiorgan failure. The peripheral blood smear revealed intracytoplasmic inclusions in neutrophils and PCR testing was positive for the agent. What do you suspect the pathogen to be