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ToRCH Antigen Products 

The commercial leader in the production of ToRCH antigens for over 20 years.

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Your Trusted Source for Native ToRCH Antigens


Microbix’s ToRCH antigens panel covers common etiologic agents of congenital infections and abnormalities. Our highly sensitive, specific, and stable native antigens are derived from cell culture-produced whole viruses that are purified and inactivated. 

ToRCH infections covered by our ToRCH antigens include toxoplasmosis, other (varicella-zoster virus, syphilis, and human parvovirus B19), rubella virus, cytomegalovirus, and herpes simplex virus (HSV). 

Proudly Supporting Over 100+ Customers with Leading  Diagnostic Solutions 

“r-Biopharm is pleased that the program will be delivering world-class diagnostic testing to some of the most remote populations in Australia. It has been a privilege to work with the program’s operational team and Microbix to integrate the use of the best possible test and test-workflow controls into the program“

Andreas Simons, Director, Project Management Clinical Diagnostics – r-Biopharm

Setting the Gold Standard for Infectious Disease Diagnostic Standards


Three Decades of Excellence

For almost three decades, our antigens have been of the highest reliability and quality for diagnostic companies worldwide. 


Testing Precision Assured

Our antigen products are excellent positive quality controls for diagnostics assays.


Comprehensive Antigen Panels

Our extensive antigen panels fit any level of immunoassay used in ToRCH screening. 

Download Our Full Product Catalogue 

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News & Insights from Our Diagnostics Experts

  • Microbix Reports Continued Strong Results for Q3 Fiscal 2024

    Microbix Biosystems Inc. reports results for its third quarter and first nine months of fiscal 2024 ended June 30, 2024 (“Q3” and “YTD”) with strong revenues, reflective of ongoing progress to increase sales from its diagnostic-test related ingredients and devices businesses and resulting in material net income for Q3 and YTD.

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Let our knowledgeable experts help you secure your ToRCH antigen products today.








    Frequently Asked Questions

    Are your ToRCH antigen products specific to certain types of ToRCH pathogens?

    Our native ToRCH antigens are used for toxoplasmosis, other (varicella-zoster virus, syphilis, and parvovirus B19), rubella virus, cytomegalovirus, and herpes simplex Virus. 

    For what applications are your ToRCH antigen products intended?

    Our ToRCH panel antigens are used in immunodiagnostic assays including ELISA, chemiluminescent automated immunoassays, immunohistochemistry, immunofluorescence, latex agglutination, rapid tests, and flow cytometry. 

    They are also used as external quality controls for diagnostic assays, basic and applied research in virology, microbiology, cell biology, immunology, and pathology, and for vaccine and antiviral research and development.

    What is the shelf life of your ToRCH antigens?

    The shelf life of our ToRCH antigens is two years from the shipping date 

    Are there options for custom concentrations or formats?

    Depending on the product type, native ToRCH antigens can be ordered in 1mL, 10mL, 50mL, or 100mL.

    Product NameEL Catalogue NumberProduct Description
    Toxoplasma gondii, Grade IgGEL-18-07Description: Native Toxoplasma gondii antigens are obtained by extracting and subsequently centrifuging Toxoplasma tachyzoites from infected cell cultures.
    Strain: RH
    Buffer: 1% Triton x-100, Phosphate Buffered Saline pH 7.4
    Toxoplasma gondii, Grade IgMEL-18-08Description: Toxoplasma Antigen, IgM Grade is produced by subjecting Toxoplasma tachyzoites to membrane fractionation, which allows for surface antigen isolation, specifically Toxoplasma p30.
    Strain: RH
    Buffer: 2% N-octyt–D-glucopyranoside (OGP) in Phosphate Buffered Saline pH 7.4
    Rubella BR2SEL-05-15Description: The predominant form of the antigen is whole virions suspended in NTE with sucrose. The preparation is free of detergent. Residual non-viral protein may come from host tissue and culture medium.
    Strain: HPV-77
    Buffer: NTE buffer (Sodium chloride, TRIS and EDTA)
    Cytomegalovirus, Grade 2EL-01-02Description: This preparation contains CMV antigens from all parts of the virus cycle of replication including early and late antigens, nuclear antigen, cytoplasmic antigen, structural and non-structural proteins. The antigen is in GBS without detergent or preservative. This preparation contains residual host cellular material.
    Strain: AD-169
    Buffer: Glycine buffered saline (GBS) pH 9.5
    Herpes Simplex 1, Grade 2EL-02-02Description: Herpes Simplex 1 Grade 2 antigen contains a high concentration of virus particles and components in tissue culture medium containing a low concentration of bovine serum. The preparation contains no preservative or detergent. Some residual host cellular material is present.
    Strain: MacIntyre
    Buffer: Tissue culture medium
    Varicella-Zoster, Grade 2EL-03-02Description: The resulting antigen preparation contains a high concentration of virus and viral components as well as some cellular material suspended in EMEM with some serum proteins.
    Strain: VZ-10
    Buffer: EMEM
    EBV Viral Capsid Ag, PurifiedEL-16-06Description: This preparation contains more than 90% virus specific protein. The predominant form of the antigen is purified protein suspended in 20mM Tris-HCl with 3M MgCl,; pH 7.4. The preparation is free of detergent. Any residual non-viral protein comes from host tissue and culture medium. The protein concentration is nominally 0.030 mg/ml.
    Strain: P3H3 cells infected with EBV
    Buffer: 20mM Tris-HCl with 3M MgCl2; pH 7.4
    EBV Viral Capsid ConcentrateEL-16-07Description: This preparation contains more than 90% virus specific protein. The predominant form of the antigen is purified protein suspended in 20mM Tris-HCl with 3M MgCl2; pH 7.4. The preparation is free of detergent. Residual non-viral protein comes from host tissue and culture medium. This preparation is a more concentrated for of EL-16-06 with a protein concentration is nominally 0.10 mg/ml.
    Strain: P3H3 cells infected with EBV
    Buffer: 20mM Tris-HCl with 3M MgCl2; pH 7.4