What condition is known to cause a false positive ELISA for HIV?
AMultiple myeloma
BLepromatous leprosy
CSystemic lupus erythematosus (SLE)
DNone of the listed conditions
A patient was suspected of having brucellosis. A serum sample was sent for a standard agglutination test, which was initially negative but became positive after dilution of the sample. What is the most likely reason for the initial negative test?
AAntigen antibody complexes
BPostzone phenomenon
CComplement inactivation
DProzone phenomenon
Which of the following methods can be used to detect congenital rubella infection in the fetus?
AIgA Antibody in fetal blood
BIgM antibody in fetal blood
CFetal hemoglobin
DT4 cell count
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