primary bacterial infectious disease typhoid fever A primary bacterial infectious disease that is a communicable systemic illness, has_material_basis_in Salmonella enterica subsp enterica serovar Typhi, which is transmitted_by ingestion of food or water contaminated with the feces of an infected person. The infection has_symptom fever, has_symptom diarrhea, has_symptom prostration, has_symptom headache, has_symptom splenomegaly, has_symptom liver enlargement, has_symptom eruption of rose-colored spots, and has_symptom leukopenia.