Ouvrir |
---|
Modifier |
NEWS
Products Range
New product:
Resist Range
Immunochromatographic Range
Pathogens detection
Respiratory Syncytial Virus (RSV)
Trypanosoma brucei gambiense (HAT)
Molecular Range
Scientific partners
PARADIS (Biowin)
Products > Human-Field > Covid-19 > FAQ
The following transport media have been tested and found to be compatible with test COVID-19 Ag Respi-Strip: Eswab Amies, Copan UTM, Dulbecco PBS, Deltaswab transport medium (DelatLab), DMEM P/S medium, 0.9% NaCl buffer, Virocult®, BHI and Viral transport medium (Jiangsu). They do not induce background noise and the intensities of the COVID signals are equivalent to those obtained with our LY-S buffer alone.
HiViral Transport Medium, Transwab®, VCM™ and all media containing guanidine hydrochloride (such as eNAT, Roche Cobas) are not compatible with this test.There is a risk of having false negative results with our test, especially with samples of patients with low levels of the virus.
Other media were tested and are listed in the table below.
According to the "Instructions For Use", it is not allowed to exchange buffer between kits. If you have volume problems, please contact your distributor who is able to provide additional vials. Nevertheless, the buffer is the same within one product of different lot numbers (e.g. Rota-Strip buffers exchange between different lots will not give rise to any problems on the strips).
At present, 8 different kinds of buffers are used in Coris’products, i.e., RE-A Buffer (for Influ –A&B Respi K-SeT), Extraction Buffer (for RSV-Strip), HC Dilution buffer (for Adeno Respi-Strip, Combi-Strip, Pylori-Strip, GastroVir-Strip, for Crypto-Giardia Duo-Strip, Giardia-Strip, and all cassette formats of the corresponding kits), HydroK buffer (for dry swab Test restricted to AdenoRespi K-SeT), ST-A buffer (for C.diff-Strip and Clostridium K-SeT), LY-A Buffer (for RSV Respi K-SeT and for kits RESIST), BL-A Buffer (for HAT Sero K-SeT), ST-1/ST-2 Buffers (for Strep-A Respi-Strip), LY-S Buffer (for COVID-19 Ag Respi-Strip) and Sample Dilution Buffer for all the other products.
Regarding the GastroVir Kit we received some particular comments claiming that the Control Line was too faint. The buffer has been improved to allow a better migration of the latex microspheres leading to a better and a more homogeneous signal. This improvement does not affect any characteristics of the kit (i.e. specificity and sensitivity).
Control line is aimed to ensure that chromatography has been performed up to the top of the strip. It is not related with the result of the diagnostic itself.
Sometimes, the control line might be "slightly weak "without any precise reason. It could be only an effect of the sample migration and / or responsiveness at the control line. The control line is aimed to validate the test using various specimen.
Yes. It might cause the appearance of false positive signal on test.
The control line is aimed to ensure the user that the chromatography is performed up to the top of the strip. It does not give any indication on the diagnostic result. Whenever a signal is observed on the test line (weak or strong), it means that the result of the test is positive for the pathogen of interest.
The red arrow indicates the limit that could not be exceeded beyond during any incubation.
It could happen that in some cases operator exceeds the indicated limit line by using different but routinely used tubes in laboratories. However, it's still possible to security a validate test as long as the incubation level is still below 1cm (i.e. the green line indicated on the figure) while the gold conjugate is placed at 2cm from the bottom of the stick.
.
The product is stable during at least 15 weeks after first opening. 15 weeks is quite high: that means at least 2 tests can be performed per week. Stability depends on the storage conditions.
Immunochromatographic test uses nitrocellulose support which is sensitive to humidity.
That's why the desiccant is recommended to be kept in the tube and in the cap.
In each case, there is an internal control (upper line). This internal control will appear if the test is running well. However the test could be used after 15 or 20 weeks and the result can be valid if the control line appears.
No. Maybe the sticker (with arrows) covering the bottom of the nitrocellulose is peeled off. In this case, the test is invalidated. Please perform the test with another strip.
If the sample does not migrate due to the presence of particles, centrifuge the diluted sample. Collect the culture supernatant and perform the test again.
Home - Site Map - Privacy Policy - Contact - FAQ All rights reserved CorisBioconcept SPRL 1996-2012© www.corisbio.com
Web traffic Optimisation
Universem
Design, Programming & hosting
Impact communication