Bacterial Antigens

CPT: 87802; 87899(x3)
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Test Details

Test Includes

Qualitative determination of the presence of antigens of H influenzae, S pneumoniae, N meningitidis, a limited number to serogroups, and group B Streptococcus


Detect bacterial antigens in serum


May be negative in early meningitis. Does not replace Gram stain and culture. The sensitivity of the tests vary from 50% to 100% depending on the specificity of the antibody and the concentration of antigen in the specimen. This test was most useful for the detection of serious H influenzae infection. Because of the availability of vaccine, this test is of extremely limited value.


Latex agglutination (LA)

Reference Interval


Specimen Requirements




2 mL


Red-top tube or gel-barrier tube

Storage Instructions


Causes for Rejection

Quantity not sufficient for analysis; inappropriate specimen source; inappropriate specimen collection device; specimen stability exceeded; name discrepancy between the name on the specimen container and the name in the computer or on the test request form

Clinical Information

Special Instructions

This assay is used for serum specimens. To submit urine or cerebrospinal fluid, order 180812.


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
006890 Bacterial Antigens 018762 Haemophilus influenzae B Ag 21320-7
006890 Bacterial Antigens 018770 N. meningitidis Ag. 19259-1
006890 Bacterial Antigens 018788 Streptococcus pneumoniae Ag 11086-6
006890 Bacterial Antigens 018804 Beta Strep (Group B) Antigen 20459-4

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