上游充通大警 SHANGHAI JIAO TONG UNIVERSITY Koch's Work with anthrax (1) 圈Method Microscopic observation ©Results Bacterial cells were observed in the blood of animals with the disease 圈Conclusion The disease might be caused by this bacterium Criticism: The bacterium might as well be a result of the disease 27 上海交通大学 《微生物的世界》27 上海交通大学《微生物的世界》 Koch’s Work with anthrax (1) Method • Microscopic observation Results • Bacterial cells were observed in the blood of animals with the disease Conclusion • The disease might be caused by this bacterium Criticism: The bacterium might as well be a result of the disease