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Cytomegalovirus

Cytomegalovirus

Cytomegalovirus

Product catalog summary
Introduction
Human cytomegalovirus (CMV), also known as Human Herpesvirus 5, is a member of the Herpetoviridae family. Primary infection typically occurs in childhood or adolescence and can be transmitted through various routes such as respiratory, digestive, or urogenital tracts. The infection is often asymptomatic or mild but can be reactivated due to changes in host-virus relations, such as during pregnancy or immunosuppressive treatment. CMV infection during pregnancy can lead to developmental defects in the fetus.

Diagnosis of Infection
Diagnosis is based on clinical symptoms and laboratory tests, primarily using the ELISA method to detect specific antibodies (IgA, IgG, IgM) in human serum or plasma. Each antibody class has diagnostic significance: IgA indicates active infection or reactivation, IgM appears a few weeks post-infection and can persist in immunosuppressed patients, and IgG indicates seroconversion and persists for life.

Antibody Response
The document provides a table for interpreting antibody levels over time, indicating stages such as acute infection, past infection, and reactivation.

Specific Antigens
Several CMV antigens are described, including p150, IEA (p72), p65, p52, p28, and gB, each with specific roles in the infection process and immune response.

ELISA Test Principle and Protocol
The ELISA test is based on a sandwich method and involves several steps including sample dilution, incubation, washing, and reading color intensity at 450 nm. The test is used for screening and evaluating therapy results.

Test Characteristics
ELISA kits have high diagnostic sensitivity and specificity, validated with the BBI Diagnostics Panel.

IMMUNOBLOT Test Principle and Protocol
Recombinant antigens are transferred to a nitrocellulose membrane. The test involves steps such as sample dilution, incubation, and washing. It is used for detailed antibody determination and confirmation of ambiguous results.

MICROBLOT-ARRAY Test Principle and Protocol
This method involves antigen spotting in triplicate to minimize statistical variation and allows for automatic assay processing. It has high sensitivity and specificity.

Ordering Information
The document lists various ELISA, IMMUNOBLOT, and MICROBLOT-ARRAY kits available for purchase, along with their catalog numbers and specifications.
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Catalog excerpts

Cytomegalovirus-1

INFECTIOUS SEROLOGY – VIROLOGY – CYTOMEGALOVIRUS ELISA, IMMUNOBLOT and MICROBLOT-ARRAY kits are optimized and validated for detection of IgA, IgG and IgM antibodies in human serum, plasma or cerebrospinal fluid Diagnostic kits are intended for professional use in the laboratory. Enzyme immunoassays for the diagnostics of cytomegalovirus infectio

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Cytomegalovirus-2

INFECTIOUS SEROLOGY – VIROLOGY – CYTOMEGALOVIRUS Diagnostic significance of antibody classes Human cytomegalovirus (CMV, Human Herpesvirus 5, IgA: Antibodies of IgA class are a sign of an active infec- HHV 5) is a member of the Herpetoviridae family. Primary infection of CMV occurs mainly in childhood or adolescence. The infection can be transmitted in different ways (e.g. respiratory apparatus, digestive or urogenital tract). Clinically, the disease process is usually tion – primary infection as well as reactivation. The IgA antibodies are produced during reactivation and they can rarely be...

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Cytomegalovirus-3

Results interpretation IgA IgM IgG Avidity Interpretation + + - non done Acute infection + (+) + high Convalescence or reactivation - - + high Past infection Description Tegument protein UL32 A strong immunogen of the late stage of infection (late antigen); it does not develop in the early stage Detectable in the IgG class in higher titres even in reactivation Immediate early antigen, capsid protein UL123 Plays a role in the early phase of the replication cycle of human CMV Important function in defence mechanisms against CMV infection Tegument protein UL83 In the IgM class - one of the markers...

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Cytomegalovirus-4

infectious serology - virology - cytomegalovirus elisa Test principle The assays are based on a sandwich type ELISA method. ^HRp) ^HRp) ^^rnti-Hu IgG ^^nti-Hu IgM | Anti-Hu IgA ^^gG IgM Antigens Purified and inactivated antigen isolated from AD 169 strain of Cytomegalovirus enriched with highly specific immunodominant epitopes. Microtiter plate Summary protocolStep Test steps Dilution of samples J 1. - serum/plasma 1:101 (io pl + 1 ml) - cerebrospinal fluid 1:3 (50 pl + 100 pl) Pipette Controls and diluted samples £ 2. 100 mI - Including blank Q 3. Incubate 30 min. at 37 °C © 4. Aspirate and...

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Cytomegalovirus-5

IMMUNOBLOT Test principle Summary protocol Recombinant antigens are transferred to a nitrocellulose membrane using a micro-dispensing method. Reaction of substrate and enzyme resulting in coloured insoluble product Strips soaking 10 min. at room 2. Enzyme-conjugated secondary antibody binding to primary antibody Specific primary antibody binding to protein Blocking agent temperature – Shaker Specific antigen protein Pipette Universal solution 2.5 ml Aspirate Dilute samples – serum/plasma 1:51 (30 μl + 1,5 ml) Pipette Controls and diluted samples 1.5 ml Incubate 30 min. at room temperature – Shaker...

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Cytomegalovirus-6

User comfort - Ready-to-use components - Colour-coded strips - Interchangeable components - Positive and Negative controls - Control lineis present on the strip - Possibility of software evaluation Clinical application - Detailed determination of the presence of antibodies against specific CMV antigens - Confirmation of ambiguous results - Confirmatory to ELISA tests Test characteristics Immunoblot Sensitivity Specificity Advantages - Identical assay procedure - Easy interpretation and reproducibility of results - Sophisticated evaluation software - High diagnostic specificity and sensitivity...

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Cytomegalovirus-7

microblot-arrayDistribution of antigens and control spots Protocol Summary Step Test steps ^ 1. Pipette Universal solution 150 pl Strips soaking 10 min. at room Description of control spots O r - Reference O tc - Test control O CM - Conjugate control IgM O CG - Conjugate control IgG O C1 - Calibration 1 O C2 - Calibration 2 O C3 - Calibration 3 O C4 - Calibration 4 User Comfort - Low sample consumption - Antigens spotted in triplicate - minimizing statistical variation - Possibility of automatic assay processing and results evaluation - Parallel testing of multiple markers simultaneously - High...

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Cytomegalovirus-8

infectious serology - virology - cytomegalovirus Ordering information elisa Cat. No. Product SmartEIA kits are designed for automated processing using the Agility® analyser. Units 96 wells 96 wells 96 wells 96 wells 96 wells 96 wells 3,5 ml 3,5 ml microblot-array Kod Product Units il Test Line® TestLine Clinical Diagnostics Ltd. Krizikova 68, 612 00 Brno, Czech Republic +420549 121 203 [email protected] www,testlinecd,com Company is certified to the quality management system standards ISO 9001 and ISO 13485 for in vitro diagnostics,

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