Solutions to these questions can be found here 1) Rabies is a disease caused by a virus that affects mammals. In 1880 Louis Pasteur investigated dogs that were suffering from rabies in order to find the cause. He believed rabies was caused by a microorganism but could not culture it in broth nor observe it under the light microscope. However, he could cause the disease in healthy dogs by injecting them with saliva from infected dogs. He was able to repeat the disease cycle in this way.
a) Why was Pasteur NOT able to observe the rabies virus? (2 marks) b) Explain why Pasteur needed to identify and culture the microorganism in order to meet the scientific standards for establishing the cause of rabies. (4 marks) 2) Pasteur performed an experiment to identify the role of microbes in decay. Justify a conclusion that can be drawn from his results. (2 marks) 3) Describe the contribution of Robert Koch to our understanding of disease. (3 marks)
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