The same, unknown bacteria is isolated from 20 sick individuals. Their samples were grown in culture and then placed in 10 healthy mice. Those mice started to show signs of a heightened immune response. To determine if the bacteria is pathogenic, what is the next step by using Koch's postulates?
A. Classify the bacteria as a noncommunicable disease.
B. Classify the bacteria as a communicable disease.
C. Reisolate it, and determine if it is the original unknown bacteria.
D. Treat the original 20 individuals with antibiotics.
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