Which test is used to confirm typhoid fever?

1. Typhoid presents with sustained high fever, weakness, stomach pain, constipation and headache. 2. Those symptoms alone do not separate it from other fevers. 3. Confirmation is by the Widal test. 4. A nurse should know that intestinal perforation and death may follow in severe untreated cases. _Source: syllabus Biology Ch7 'Human Health and Disease', section 7.1_