FAQ Didn't find the answer? Contact us via the feedback form. WHAT IS THE ACCURACY OF THE TESTS? (SENSITIVITY AND SPECIFICITY). * Test sensitivity - 93%, specificity - 100%. In a practical sense, this means that if you get a positive result, then with a probability of 100% the SARS-CoV-2 antigen has been detected. Moreover, if a negative result is obtained, then with a probability of 93% the patient does not have the SARS-CoV-2 antigen. This does not mean that the RNA / DNA of the virus cannot be detected in the patient, perhaps, if there are traces of the virus, at maximum Ct PCR cycles, this is possible, because the RNA / DNA of the virus is present longer in the body, even after the virus is no longer able to cultivate and the person is not contagious and depends on the type of sample. Nevertheless, it is a negative antigen test that indicates that either the virus is completely absent, or the antigen nucleocapsid protein containing the enzyme necessary for its reproduction has not been detected. ​ * Confirmed sensitivity and specificity during clinical trials in Russia. ANTIGEN OR ANTIBODY, IGG / IGM? When does it make sense to use antigen tests and when antibodies? In the acute period, that is, during the period of onset of symptoms and the onset of the disease from 1-7 day justified using a test to determine the antigen, that is, the virus itself, as long as it is present in the body. Due to the high sensitivity and specificity of the C-test AG Covid-19, the virus is detected even with a minimum viral load. From the 5th day, antibodies are usually formed. Antibody tests are effective at this time. It is important to note that IgG and IgM antibodies appear at different times, and the intensity of staining in the presence of experience with such tests, suggests the duration of the course of the disease. In other words: antigen - "is there a virus now", antibodies - "was it Covid-19 and is there any antibodies". PCR OR ANTIGEN? It must be remembered that the two methods differ and the use of each specific one depends on the diagnostic purpose. As simply as possible: the PCR test will tell you whether a person is sick or not, or whether he was sick, in addition, you can roughly assume a viral load depending on the cycle. From the result, the test for Antigen, it is possible to understand not only whether a person is sick or not, but also whether he is able to transmit the virus to another person, and also suggest the level of viral load depending on the brightness of the "T" line color. In addition, it must be remembered that the PCR method is instrumental, while the express test is used without additional equipment (reader). IS AN ANTIGEN POSITIVE TEST POSSIBLE WITHOUT SYMPTOMS? This happens and is often due to the fact that a person is an asymptomatic carrier. The test has a high sensitivity, which makes it possible to detect the virus even at its weak concentration. The presence of symptoms refers to the individual characteristics of the body, and this does not mean that the virus is absent in the body. FAQ: FAQ info@c-test.ru

Набор реагентов "Экспресс-тест для качественного определения Vibrio Cholerae (VCO139, VCO1-O &VCO1-I) иммунохроматографическим методом в образцах из кала и воды "C-test VC AG Combo Test" Кат. № VC-AG-22 Предназначен для одновременного и дифференциального обнаружения Vibrio Cholerae O139 (VCO139), Vibrio Cholerae O1-Ogawa (VCO1-O) и Vibrio Cholerae O1-Inaba (VCO1-I) в образцах кала или воды. ​ Инструкция Отправить запрос Набор реагентов "Экспресс-тест для качественного определения атител Igg к вирусу Кори (Measles virus) иммунохроматографическим (ИХА) методом "C-test MV Igg" (уп.№25) Предназначен для обнаружения антител Igg в вирусу Кори в образцах цельной крови, плазмы и сыворотки. Отправить запрос

TEST PROCEDURE * when performing a test procedure using a ready-made sample in a transport medium, simply add the required amount (3 drops or 80 μl) to the sample window on the test cartridge. Pay attention to the expiration date and storage conditions of the sample. instructions for use Sample preparation materials are standard for any laboratory and are therefore not included in our kit. You will need separately: Protective gloves; Protective masks; Sterile swab probe for sampling; Disposable micropipette or dispenser; Microtube 0.5-2 ml, Eppendorf type. STEP 1 To collect the sample from the nasopharynx swab, insert a sterile swab into the patient's nostril, reaching the posterior surface of the nasopharynx STEP 2 Gently push the probe swab until resistance appears at the level of the turbinate. Rotate the tampon slowly 3-5 times along the back of the nasopharynx STEP 3 Gently remove the probe swab from the nostril STEP 4 Add 300 μl (10 drops) of the supplied buffer to a 0.5 / 1.5 / 2 ml Eppendorf microtube * If the sample has already arrived in the transport medium in Eppendorf or the transport medium is already packaged in a volume of 300-500 μl, then skip this step. STEP 5 Dip the swab probe with the swab into the microtube and rotate it in the buffer at least 5 times, wiping the swab probe on the inner walls of the microtube. If the swab-probe design allows breaking off the tip of the swab-probe with the sample, it is necessary to leave it in the buffer for 2 minutes while shaking it at least five times in a closed microtube STEP 6 Add 80 µl (3 drops from a microtube) to the cartridge window “S”. Evaluate the test result in 10-15 minutes. INTERPRETATION OF RESULTS IMPORTANT: The intensity of the staining of the strips in the test window, if the result is positive , may vary depending on the amount of SARS-CoV-2 antigen nucleocapsid protein in the sample. Any lightly colored line (s) in the test window opposite the indicator (T) (if there is a line in (C)) are interpreted as a positive result. NEGATIVE ONE PAINTED LINE AGAINST INDICATION "C" INDICATES A NEGATIVE TEST RESULT. POSITIVE TWO COLORED LINES ("C" CONTROL LINE AND "T" TEST LINE) IN THE RESULT WINDOW, INDICATE A POSITIVE TEST FOR SARS-COV-2. ERROR IF THE COLORED LINE IN THE CONTROL WINDOW OTHERWISE THE DESIGNATION "C" DOESN'T APPEAR, THE RESULT IS WRONG. IF THE RESULT IS WRONG, REPEAT THE TEST ONCE AGAIN USING THE REMAINING SAMPLE AND A NEW TEST.