His laboratory focuses on the pathogenesis of the Chlamydia family of bacteria, intracellular bacterial pathogens with a complicated developmental cycle. Grieshaber is using high-screening microscopy coupled with real-time computer image analyses to probe the interaction between chalmydia and host cells at the individual cell level. He received his PhD from the University of Wyoming and did postdoctoral research on intracellular pathogenesis at NIH’s Rocky Mountain Laboratories in Hamilton, Montana.