Define sustained fever?: (A) Fever is persistent and does not vary by more than 0.5degC/day, (B) Fever is persistent and varies by more than 0.5degC/day., (C) Fever is persistent and does not vary by more than 1degC/day, (D) fever is persistent and varies by more than 1degC/day.
Answer is A. Sustained fever is persistent and does not vary by more than 0.5degC (0.9degF)/day. Remittent fever is persistent and varies by more than 0.5degC (0.9degF)/day. Relapsing fever is characterized by febrile periods that are separated by intervals of normal temperature; teian fever occurs on the 1st and 3rd days (malaria caused by Plasmodium vivax), and quaan fever occurs on the 1st and 4th days (malaria caused by Plasmodium malariae).Ref: Nelson; 20th edition; Chapter 176; Fever; Page no: 1278