In person with invasive aspergillosis, there may be high titers of galactomannan antigen in serum and bronchoalveolar lavage (BAL) fluid.
CRP test measures the level of C-reactive protein which is present in the blood.The increased high level of CRP in blood gives a sign that there can be inflammatory processes occurring in the body.
It is used to detect the presence of ‘incomplete’ Rh antibodies i.e. IgG antibodies capable of sensitising RBCs but incapable of causing hemagglutination.
TPHA is a treponemal test for the serologic diagnosis of syphilis, based on the principle of passive hemagglutination. It detects IgG and IgM.
Widal test is one of the oldest and most widely used serological tests for the diagnosis of enteric fever.
In the presence of specific Abs to an infectious agent, any complement in the system is bound, leaving no residual complement for rxn with Abs to the RBCs.
RPR test is a macroscopic, nontreponemal flocculation card test used to screen for syphilis. RPR test measures IgM and IgG antibodies to lipoidal material.
Rapid latex agglutination test for the qualitative and semi-quantitative determination of anti-streptolysin-O antibodies (ASO) in serum.
Venereal disease research laboratory (VDRL) test is a nonspecific flocculation test for the screening of syphilis.
HBsAg is present early in acute infection, disappears with a resolution of infection, and persists in chronic infection.
Counterimmunoelectrophoresis is a modification of Ouchterlony method that speeds up migration of an antigen and antibody by applying an electrical current.
Agglutination tests detect Ab or Ag and involve agglutination of particulate antigens (bacteria, RBCs or Ag- or Ag-coated latex particles).