to evaluate the specificity of serologic tests for histoplasmosis in an endemic area , we studied sera from 104 consecutive healthy blood donors , testing for antibodies to either histoplasmin or histoplasma yeast antigen , using complement fixation ( cf ) , radioimmunoassay ( ria ) , and radial immunodiffusion ( id ) .
C0019655
histoplasmosis
C0019654
histoplasmin