_:b663515824 . _:b663515824 . _:b663515824 . _:b663515824 "A bacterial infectious disease that results_in infection by bacteria as a result of their presence or activity within the normal, healthy host, and their intrinsic virulence is, in part, a necessary consequence of their need to reproduce and spread." . _:b663515824 . _:b663515824 . _:b663515824 . _:b663515824 "url:http://en.wikipedia.org/wiki/Infectious_disease" .