Why did Bazarov die? Novel " Fathers and sons "

There is a nihilist, sincerely trusting in correctness of his belief in the novel " Fathers and sons".
Eugeny Bazarov is the nihilist, so the materialist, who is not recognizing dogmas, checking everything only with experience. He is a physician, being interesting in natural sciences. His days are filled with work and new searches.
Turgenev creates a hero to check up what is necessary in that world and what has no right to exist. Getting convinced that the "person-comet" does not need for a life at all, Turgenev compels Bazarov to die.
The death was in Bazarov's philisiphy, in his aspirati…