Ordering Recommendation

Use to evaluate antibody production and rule out antibody deficiency in patients vaccinated with a pure polysaccharide vaccine (eg, Pneumovax) or protein conjugated vaccine (eg, Prevnar or Vaxneuvance).

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Serum separator tube. Postimmunization specimen should be drawn 30 days after immunization and, if shipped separately, must be received within 60 days of preimmunization specimen.

Specimen Preparation

Separate serum from cells within 2 hours of collection. Transfer 1.5 mL serum to an ARUP standard transport tube. (Min: 0.25 mL) MARK SPECIMENS CLEARLY AS "PRE" OR "POST" SO SPECIMENS WILL BE SAVED AND TESTED SIMULTANEOUSLY .

Storage/Transport Temperature

Refrigerated. "Pre" and "post" pneumococcal vaccine specimens can be submitted separately or together for testing.

Unacceptable Conditions

Plasma or other body fluids. Contaminated, hemolyzed, or severely lipemic specimens.


After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 60 days (avoid repeated freeze/thaw cycles)


Quantitative Multiplex Chemiluminescent Immunoassay


Tue, Fri


1-5 days

Reference Interval

Interpretive Data

A pre- and postvaccination comparison is required to adequately assess the humoral immune response to the pure polysaccharide Pneumovax 23 (PNX) and/or the protein conjugated Prevnar 7 (P7), Prevnar 13 (P13), Prevnar 20 (P20), and Vaxneuvance (V15) Streptococcus pneumoniae vaccines. Prevaccination samples should be collected prior to vaccine administration. Postvaccination samples should be obtained at least 4 weeks after immunization. Testing of postvaccination samples alone will provide only general immune status of the individual to various pneumococcal serotypes.

In the case of pure polysaccharide vaccine, indication of immune system competence is further delineated as an adequate response to at least 50 percent of the serotypes in the vaccine challenge for those 2-5 years of age and to at least 70 percent of the serotypes in the vaccine challenge for those 6-65 years of age. Individual immune response may vary based on age, past exposure, immunocompetence, and pneumococcal serotype.

Responder Status                     Antibody Ratio

Nonresponder . . . . . . . . . . .  Less than twofold increase and postvaccination concentration less than 1.3 ug/mL

Good responder . . . . . . . . . . .At least a twofold increase and/or a postvaccination concentration greater than or equal to 1.3 ug/mL

A response to 50-70 percent or more of the serotypes in the vaccine challenge is considered a normal humoral response. (Daly, 2014) Antibody concentration greater than 1.0-1.3 ug/mL is generally considered long-term protection. (Daly, 2015)


1. Daly TM, Pickering JW, Zhang X, et al. Multilaboratory assessment of threshold versus fold-change algorithms for minimizing analytical variability in multiplexed pneumococcal IgG measurements. Clin Vaccine Immunol. 2014;21(7):982-988.

2. Daly TM, Hill HR. Use and clinical interpretation of pneumococcal antibody measurements in the evaluation of humoral immune function. Clin Vaccine Immunol. 2015;22(2):148-152.

Compliance Category

Laboratory Developed Test (LDT)


Hotline History


CPT Codes

86317 x9


Component Test Code* Component Chart Name LOINC
0050719 Pn Serotype Interpretation 42771-6
2005780 Pn serotype 2 IgG (PNX) 86039-5
2005781 Pn serotype 10A IgG (P20,PNX) 86098-1
2005782 Pn serotype 11A IgG (P20,PNX) 86122-9
2005783 Pn serotype 15B IgG (P20,PNX) 40973-0
2005784 Pn serotype 17F IgG (PNX) 86009-8
2005785 Pn serotype 19A IgG (P13,P20,PNX,V15) 40974-8
2005786 Pn serotype 20 IgG (PNX) 86045-2
2005787 Pn serotype 22F IgG (P20,PNX,V15) 86052-8
2005788 Pn serotype 33F IgG (P20,PNX,V15) 40969-8
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


Streptococcus pneumoniae Antibodies, IgG (9 Serotypes)