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This test kit is used for qualitatively detection of CVA16- IgM antibody in the human blood, serum or plasma samples, as an auxiliary diagnostic reagent of CVA16 antibodies infection in the clinical diagnosis. Coxsackie virus (CV) is one of the Picornaviridae enterovirus and is the pathogenic noxae of many human diseases and can cause respiratory tract infection, fever-rash, hand-foot-mouth disease, conjunctivitis, herpes pharyngitis, myocarditis, aseptic meningitis, cardiomyopathy, and encephalitis, acute flaccid paralysis and other diseases. Coxsackie virus has 30 serotypes and is divided into two groups of A and B. The CV A16 is one of the main reasons of the hand-foot-mouth disease in children. It is mainly transmitted by the fecal, mouth, respiratory tract and close contact and mainly infects the children below 5 years of age and often co-epidemic with EV71.
PRINCIPLES OF THE TESTS
This test kit applies the technology of colloidal gold immunochromatography for qualitative test of the CVA16- IgM antibody present in the whole blood, serum or plasma samples. The CVA16-IgM antibodies in positive samples can combine with colloidal gold labeled mouse-anti-human IgM immobilized on the conjugate pad to form immune complex, and move along the membrane strip by chromatography. Some of the complex is caught by recombinant CVA16-Ag pre-coated on the T line to form "gold labeled mouse-anti-human IgM- CVA16 IgM Ab- CVA16 Ag" and develop color. The remaining free complex is caught by the goat-anti-mouse IgG antibody coated on the C line to develop color. And for negative samples, in which there are no CVA16- IgM antibodies, cannot form immune complexes or develop color on the T line, and colorate on the C line only.
Test kit (Coating the recombinant CVA16 VP1 antigen on T-line, the goat-anti-mouse IgG antibody on C-line): 40 test cards/ box
The sample diluents: 1 bottle (5 ml)
Product instruction: 1
STORAGE CONDITIONS AND THE PERIOD OF VALIDITY
Can be stored for 24 months in a dry place at 4° to 30â
Use test card within 1 hour once opened to atmosphere where the humidity is below 60%, or use it immediately if the humidity is higher
Serum and plasma samples are collected from the venous blood by the conventional method. Plasma sample: add 100ul heparin solution (1%) to 5 to 10ml blood; or sodium citrate solution (3.8%) to plasma according to the proportion of 1:9; or EDTA solution (15%) 0.04ml to 5ml plasma.
Serum and plasma samples can be stored at 4â if test is done within 5 days or else store at -20 â and not more than 3 times of freeze-thaw.
Whole blood samples should be stored at 2 to 8â and should be tested within 3 days, it cannot be frozen.
The test result is invalid for hemolytic sample.
Test preparation: 10Î¼L, 50Î¼L, 100Î¼L micropipettes, and matched tips
Test process: Make sure that before the test the temperature of the kit and the sample should be the same with the room temperature. Place the test card on a horizontal dry work surface. Add 10Î¼L serum or plasma sample into the sample well or 50Î¼L whole blood and then add 100 Î¼L of sample dilution immediately. Observe the result in 15 to 20 minutes after the serum or plasma samples are added. The observation is invalid after 20 minutes.
TEST RESULTS EXPLAIN
The color developed on C line only: negative; color developed on both C line and T line: positive; color developed on T line only: invalid; color not developed on both C line and T line: invalid.
Note: Re-detection if the detected result is invalid. The invalid test cards should be dealt with as infectious pollutants and the temperature of the kit and sample should be the same with room temperature before pre-detection.
It was vulnerable to the visual error or the subjective judgment factors duplicate the detection when the stripe color is not obvious.
The detection card is one of the assistant diagnostic methods; its test results are only for the reference and should not be the sole base for clinical diagnosis and its treatment. The positive results should be further verified by other methods also. Due to the limit of its detection sensitivity, the negative results should also be observed because the concentration of the antibodies is lower than the analysis sensitivity. It should combine with the clinical diagnosis, medical history, and other detection methods.
During the early stage of infection, IgM may not be generated or may be in low titer. It may give negative results. Suggest the patients review the test in 7 to 14 days and do the parallel detection to the old samples at the same time, so as to confirm whether the serological positive or titer increased significantly.
The results will be unreliable for patients with impaired immune function or immunosuppressive treatment.
Positive results will not only occur in the primary infection but also in the secondary infection.
This test kit is a qualitative test and cannot be used for determining the antibody levels.
It is used for the test of serum or plasma samples only, not for saliva, urine or any other body fluids testing.
PRODUCT PERFORMANCE INDICATORS
Positive coincidence rate: to the internal reference (+/+) =10/10; Negative coincidence rate (-/-) =10/10; precision (n=10): positive for all tests, and develop color equably; Minimum detection limit: positive end point is not less than 1:8 dilution of positive reference. The samples which is positive with toxoplasma IgM antibody (S/C value: â¤ 13.65), rubella virus IgM antibody (S/C value: â¤ 11.42), cytomegalovirus IgM antibody (S/C value: â¤ 13.41), herpes simplex virus II IgM antibody (S/C value: â¤ 12.53), Toxoplasma IgG antibody (S/C value: â¤ 13.45), rubella virus IgG antibody (S/C value: â¤ 10.39), cytomegalovirus IgG antibody (S/C value: â¤ 13.15), herpes simplex virus II IgG antibody (S/C value: â¤ 14.28), hepatitis B virus surface antigen (S/C value: â¤ 13.57), hepatitis C virus surface antigen positive (S/C value: â¤ 14.75), Treponema pallidum antibody (S/C value: â¤ 12.35), HIV (S/C values: â¤ 11.37), HEV-IgM (S/C values: â¤ 12.15), MP-IgM (S/C values: â¤ 9.23), MP-IgG (S/C values: â¤ 9.66), RSV-IgM (S/C values: â¤ 5.56) rheumatoid factor (â¤ 54IU/ml), antinuclear antibody (â¤ 1:640), staphylococcus aureus etc cannot affect results. There is an impact in the test when the lipid content of the sample is higher than 6mmol / L and the bilirubin level is higher than 40Î¼mol / L.
When the kit test result is positive use other methods also for confirmation
Avoid the test card being exposed in the air for a long time since it can absorb moisture that can affect the test results. Use the test card within 1 hour once opened to the atmosphere and humidity is below 60%, or use it immediately if the humidity is higher.
The degree of coloration on the test line does not connect to the antibody titers in the test sample.
The color of C line is likely to abate when the content of the Cpn-IgM is extremely high in the sample. It is a normal phenomenon.
Be attentive to the potential biological risks. Wear necessary protective equipment, and deal with the waste as infectious material.