Why do you use koch postulates?

Koch's postulates are used to establish a causal relationship between a specific microbe and a disease. They provide a systematic framework for identifying the pathogens responsible for Infectious Diseases by demonstrating that the microbe is present in diseased individuals, can be isolated and cultured, causes the disease when introduced to a healthy host, and can be re-isolated from the experimental host. This method has been foundational in microbiology and has helped in understanding and controlling infectious diseases.