Sentence:  Let us assume that it would be possible for an enemy to create an aerosol of the causative agent of epidemic <WSD>typhus</WSD> ( Rickettsia prowazwki ) over City A and that a large number of cases of typhus fever resulted therefrom . 
Meaning of the word marked with <WSD> tags:  rickettsial disease transmitted by body lice and characterized by skin rash and high fever