NJDHSS, Communicable Disease Service: Typhoid Fever Disease Index Health & Senior Services NJ InTouch What You Should Know About. . . Typhoid Fever What is typhoid fever Typhoid fever is an illness caused by infection with the bacterium Salmonella typhi. It is primarily an intestinal infection, but in a small number of cases, it can infect the bloodstream. Salmonella typhi is different from the other types of Salmonella (see Salmonellosis) that ... www.state.nj.us/health/cd/f_typhoid.htmreviews