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The INCSTAR CMV IgG ELISA Kit contains instructions and materials for the qualitative and/or semi-quantitative detection of IgG antibodies to cytomegalovirus in human serum by indirect enzyme-linked immunosorbent assay (ELISA) technique. When performed according to instructions, the CMV IgG ELISA test is of value in the determination of immunological response to infection with CMV. The evaluation of parred sera, acute and convalescent, by demonstrating seroconversion or a significant rise in antibody can aid in the diagnosis of primary infection, reactivated infection, or reinfection with cytomegalovirus.

The INCSTAR CMV IgG ELISA test kit utilizes the enzyme-linked immunosorbant assay (ELISA) technique for the detection of cytomegalovirus IgG antibodies. Polystyrene microtiter wells are coated with purified CMV antigen. Diluted patient serum is incubated with purified CMV antigen bound to the solid surface of a microtiter well. The CMV antibodies that are present in the patient's serum will be captured by the solid phase. After washing, these complexes bind with horseradish peroxidase labeled antihuman IgG which react with the addition of chromogen (tetramethylbenzidine), resulting in color development. The absorbance of the solution, measured at 450 nm, is directly proportional to the concentration of IgG antibodies to CMV antigen present in the reaction solution.

{
  "acceptance_criteria_and_performance": {
    "table": [
      {
        "criterion": "Relative Sensitivity",
        "acceptance_range": "99% to 100%",
        "reported_performance": "99% to 100%"
      },
      {
        "criterion": "Relative Specificity",
        "acceptance_range": "96% to 99%",
        "reported_performance": "96% to 99%"
      },
      {
        "criterion": "Overall Agreement",
        "acceptance_range": "90% to 100%",
        "reported_performance": "90% to 100%"
      }
    ]
  },
  "study_details": {
    "sample_size_test_set": "308 serum samples representing 296 individuals",
    "data_provenance": "Mixed population of healthy donors, immunocompromised hosts, transplant patients, and patients having various other illnesses. (Country of origin not specified, retrospective implied as samples were collected and then tested)",
    "num_experts_ground_truth": "Not applicable, ground truth established by comparison to a predicate device (GULL CMV IgG ELISA Test) and a commercial CMV IgG ELISA for discrepant results.",
    "qualifications_experts": "Not applicable",
    "adjudication_method": "Discrepant results between the INCSTAR CMV IgG ELISA Kit and the GULL CMV IgG ELISA Test were resolved by a commercial CMV IgG ELISA.",
    "mrmc_comparative_effectiveness_study": "No, this was a device-to-device comparison, not a human reader study.",
    "standalone_performance": "Yes, the study describes the performance of the INCSTAR CMV IgG ELISA Kit in comparison to a predicate device.",
    "type_of_ground_truth": "Comparison to a predicate device (GULL CMV IgG ELISA Test) and a commercial CMV IgG ELISA for resolving discrepancies.",
    "sample_size_training_set": "Not specified; this is likely a locked-down assay, not a machine learning model requiring training data from the clinical study perspective.",
    "how_ground_truth_training_set_established": "Not applicable (as above)."
  }
}

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