What is the importance of isolation and identification of unknow bacteria?

our instructor give us a mixed culture and we have to seperate this two bacteria until we get a pure culture then we have to identify the names of this two bacteriaWhat is the importance of isolation and identification of unknow bacteria?
In the human body, there are more bacterial cells than human cells. If a patient comes into a doctor's office and the symptoms are not enough for a doctor to make a diagnosis, he or she must be able to isolate the pathogenic bacteria in order to treat the patient.





Thus, understanding the individual properties of each species is extremely important. Also, each type of antibiotic kills certain types of bacteria. Penicillin does not kill all pathogenic bacteria. We must isolate and study each specimen in order to combat it for medicinal purposes.