EBV VCA IgA ELISA Kit
INTENDED USE
Human EBV VCA IgA ELISA kit is intended for detecting in-vitro quantitative amounts of human IgA antibodies to Epstein–Barr virus viral-capsid antigen (EBV VCA IgA) using serum and plasma. This assay has a minimum analytical sensitivity limit of 1.0 U/ml.
BACKGROUND
Epstein–Barr virus viral-capsid antigen (EBV VCA) has an important role in providing the viral capsid of the Epstein–Barr virus (EBV). This antigen is targeted by anti-VCA antibodies and these antibodies are crucial in the diagnosis of infectious mononucleosis using many different serology testing methods. Elevated levels of anti-VCA IgG antibodies is a good indicator of prior infection whereas elevated levels of anti-VCA IgM can indicate acute infection. The anti-VCA IgM appears early during an EBV infection and it tends to disappear between 4-6 weeks, whereas anti-VCA IgG is present during the acute phase of EBV infections (peaks between 2-4 weeks and persist throughout a person life). Clinical findings of infectious mononucleosis can be identified in conjunction with the appearance of IgM and IgG anti-VCA antibodies. Also, for primary infections, the sensitivity of IgM and IgG anti-VCA testing are regarded as being 100% reliable.
EBV VCA IGA ELISA KIT CONTENT
All reagents supplied need to be stored at 2 °C – 8 °C, unopened reagents will retain reactivity until expiration date. Do not use reagents beyond this date.
- EBV VCA coated microtiter strips.
- Calibrator A (Negative Control).
- Calibrator D (Positive Control).
- Calibrator B (Cut-Off Standard).
- Calibrator C (Weak Positive Control).
- Sample Diluent.
- Enzyme Conjugate.
- TMB Substrate.
- Washing Buffer (10x).
- Stop Solution.
SENSITIVITY
The minimum detection sensitivity level of IgA antibodies against Epstein–Barr virus viral-capsid antigen (EBV VCA IgA) using current human EBV VCA-IgA ELISA kit was 1.0 U/ml. The dynamic range for this assay is 1.0 – 125.0 U/ml.
ASSAY CHARACTERISTICS
– EBV VCA ELISA: IgA
– Intra-Assay-Precision: 5.8 %
– Inter-Assay-Precision: 3.4 – 5.0 %
– Inter-Lot-Precision 3.9 – 8.7 %
– Analytical Sensitivity: 1.01 U/mL
– Recovery: 100 – 104 %
– Linearity: 84 – 116 %
– Cross-Reactivity: No cross-reactivity to Measles, Mumps and Varicella.
– Interferences: No interferences to bilirubin up to 0.3 mg/mL, hemoglobin up to 8.0 mg/mL and triglycerides up to 5.0 mg/mL.
– Clinical Specificity: 99 %
– Clinical Sensitivity: 100 %
REFERENCES
- A meta-analysis on the EBV DNA and VCA IgA in diagnosis of Nasopharyngeal Carcinoma. Pak J Med Sci. (2013) 29 (3): 885-90. Review. Song C. and Yang S.
- Correlation Analysis of Nasopharyngeal Carcinoma TNM Staging with Serum EA IgA and VCA IgA in EBV and VEGF-C and -D. Med Sci Monit. (2015) 21: 2105-9. Sun R., et al.
- Expression of Serum Sialic Acid, Early Antigen-IgA, and Viral Capsid Antigen-IgA in Nasopharynx Cancer Patients: The Diagnostic Implication of Combined Assays. Med Sci Monit. (2015) 21: 4068-73. Sun Y., et al.
- Development of a time-resolved fluoroimmunoassay for Epstein-Barr virus viral capsid antigen IgA antibody in human serum. J Virol Methods. (2015) 222: 16-21. Liang Q.N., et al.
- Evaluation of a semi-quantitative ELISA for IgA antibody against Epstein-Barr virus capsid antigen in the serological diagnosis of nasopharyngeal carcinoma. Int J Infect Dis. (2014) 25: 110-5. Chen H., et al.
- Increased incidence of IgA antibodies to the Epstein-Barr virus-associated viral capsid antigen and early antigens in patients with chronic lymphocytic leukemia. Int J Cancer. (1986) 38 (1): 55-9. Dölken G., et al.
ADDITIONAL INFORMATION
- Full Name: EBV VCA IgA ELISA Kit
- Reactivity: Human
- Sample Type: Plasma, Serum
- Sensitivity: 1.0 U/ml
