Overview
Measles serology detects IgM for acute infection and IgG for immunity/past exposure.
Clinical Importance
Diagnose suspected measles
Assess immunity when vaccination records are uncertain
Specimen Requirements
- Specimen: serum (preferred for most serology/autoimmune immunoassays) or plasma when the method is validated
- Tube: gold/SST (serum separator) or red-top serum; follow method-specific plasma acceptability
- Handling: allow SST to clot fully; centrifuge and separate promptly; avoid repeated freeze–thaw
- Storage: refrigerate short-term; freeze aliquots for delayed testing per manufacturer stability
- Stability: analyte- and kit-specific; do not exceed validated time/temperature limits
Analytical Method
Immunoassays for measles IgM/IgG; PCR from respiratory/urine specimens is preferred for acute diagnosis in many public-health algorithms.
Instruments Used
Automated analyzers
- Roche Cobas immunoassay systems
- Abbott Alinity / Architect immunoassay systems
- Siemens Healthineers Atellica / ADVIA Centaur systems
- DiaSorin LIAISON systems
- bioMérieux VIDAS systems
- Ortho Vitros immunoassay systems
Manual methods
- Manual ELISA and rapid immunochromatographic serology tests
Reference Values
Assay cutoffs, units, and reference intervals are method- and manufacturer-specific. Always interpret against the performing laboratory report (CLSI EP28-A3c for quantitative intervals where applicable). Serologic patterns require clinical correlation and current guideline algorithms (WHO/CDC/society guidance as adopted locally).
IgG immune cutoffs are method-specific. IgM nonreactive expected without acute infection.
Interpretation
Common Causes of Increased Results
- Measles IgM reactive; supports acute infection with clinical/epidemiologic correlation and public-health reporting
- Measles IgG reactive; immunity/past infection or vaccination
Common Causes of Decreased Results
- IgG nonreactive; susceptible
Clinical Significance
- Outbreak and case evaluation
- Immunity screening
Factors Affecting Results
Pre-analytical
- Hemolysis, lipemia, or icterus (assay-dependent interference)
- Wrong tube type or incomplete clotting of SST
- Repeated freeze–thaw of serum aliquots
- Testing too early or too late relative to infection/vaccination timing for serology
Analytical
- Calibration/QC failure; reagent lot shifts
- Hook effect / antigen excess on selected immunoassays
- Heterophile antibodies, rheumatoid factor, or biotin interference (assay-dependent)
Post-analytical
- Applying another laboratory’s cutoff to a different method
- Interpreting a single serology result without clinical timing and confirmatory algorithms
Advantages and Limitations
Advantages
- Supports measles case classification
Limitations
- PCR often superior for early acute diagnosis
Clinical Pearls
Suspected measles is a public-health test as much as a laboratory test; involve the algorithm early.
References
Authoritative textbooks, guidelines, and reviews supporting this laboratory test reference. Verify reference intervals, critical limits, and method details against institutional protocols and current guideline editions.
Textbooks
- McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods (verify current edition). Chapters on clinical immunology and serology.
- Rifai N, Horvath AR, Wittwer CT, eds. Tietz Textbook of Clinical Chemistry and Molecular Diagnostics (verify current edition). Immunoassay and protein chapters.
CLSI and Professional Guidelines
- Centers for Disease Control and Prevention. Laboratory testing recommendations for infectious disease serology and related algorithms (verify current CDC guidance for the pathogen).
- Clinical and Laboratory Standards Institute. Defining, Establishing, and Verifying Reference Intervals in the Clinical Laboratory. CLSI document EP28-A3c (verify current edition).
- Clinical and Laboratory Standards Institute. Immunoassay and related method evaluation documents (e.g., EP05, EP06, EP07, EP17; verify current editions relevant to the assay).
- College of American Pathologists. Accreditation and proficiency testing expectations for immunology/serology (verify current CAP checklist requirements).
- International Federation of Clinical Chemistry and Laboratory Medicine (IFCC). Recommendations relevant to protein and immunoassay measurands (verify current IFCC documents).
WHO Publications
- World Health Organization. Laboratory and diagnostic guidance for serologic and immunologic testing (verify current WHO publication for the analyte/assay).
Frequently Asked Questions
Common questions about using this Measles Serology laboratory test Medical Laboratory Library reference in Medical Laboratory Science education.
What is the Measles Serology laboratory test reference used for?
This Medical Laboratory Library page summarizes the clinical importance of Measles Serology. Review the Clinical Importance section for why the test is ordered in laboratory medicine practice.
Where can I find Measles Serology specimen requirements?
See the Specimen Requirements section on this page for specimen information related to Measles Serology. Confirm collection details against your laboratory protocol.
Where are Measles Serology reference values listed?
See the Reference Values section on this Laboratory Library page. Reference ranges can vary by method and population, so verify intervals with your laboratory.
How do I interpret Measles Serology results?
Use the Interpretation section for laboratory interpretation framing, including increased and decreased result patterns when provided. Do not treat educational text as a patient-specific diagnosis.
What analytical method is used for Measles Serology?
See the Analytical Method section for principle and method notes. Method details may differ by instrument and institutional SOP.
Are related laboratory tests linked from Measles Serology?
Yes. The Related Laboratory Tests section lists connected references for continued lookup in the Medical Laboratory Library.
How can I continue learning after reading Measles Serology?
Use Continue learning links on this page for related Academy lessons, medical laboratory quizzes, or laboratory case studies when available for this Immunology & Serology topic.
What are the clinical pearls for Measles Serology?
See the Clinical Pearls section for concise laboratory practice notes associated with Measles Serology. Apply pearls alongside institutional protocols.
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