Use of paired serum samples for serodiagnosis of typhoid fever.
House D., Chinh NT., Diep TS., Parry CM., Wain J., Dougan G., White NJ., Hien TT., Farrar JJ.
Using an enzyme-linked immunosorbent assay we demonstrate that, in adult patients with typhoid fever, the sensitivity of a serological test based on the detection of anti-lipopolysaccharide immunoglobulin G is increased when used with paired serum samples taken 1 week apart.