Although a Useful Test in the Past,the Particle Agglutination Assay

Multiple Choice

Although a useful test in the past,the particle agglutination assay for the detection of H.influenzae,type b,capsular polysaccharide antigen is no longer reliable because of:

A) insufficiently high concentration of the organisms in clinical infections.
B) a lack of sensitivity and specificity of the test procedure.
C) the frequent use of antimicrobial therapy before collecting the specimen.
D) the increased use of H.influenzae,type b,vaccination.