Typhoid Fever  Causative agent: Salmonella typhi Incubation Period: 10-14 days Mode of transmission: Faeco-oral route, urine-oral route . The bacteria that cause typhoid fever spread through contaminated food or water and through direct contact with someone who is infected. Clinical features:  High Fever(101-104 f)  Headache  Abdominal Pain Weakness and Fatigue Muscle Aches Sweating Dry Cough