the value of the enzyme-linked immunosorbent assay ( elisa ) for the serological diagnosis of typhoid or paratyphoid fevers was tested with a collection of five sets of sera from 23 individuals who had no history of salmonella infection from a nonendemic area ( set 1 ) and from 143 patients from a highly endemic area ( sets 2 to 5 ) .
C0030528
paratyphoid fevers
C0036117
salmonella infection