Shanghai Chemtron Biotech Co.Ltd.

Interpretation of Test Results and Limitations of OTC Rapid Strep Test

Interpretation of test results

1. Negative results
A purple-red control line will appear only in the upper half of the window, indicating that the result is negative. The control line means that the test was performed correctly, but group A streptococcal antigen was not detected.

2. Positive results
Two purple-red lines will appear, indicating the detection of group A streptococcal antigen. Low-level antigen specimens can give a dim sample line. Any visible purple-red sample line is positive.

3. Invalid results
If there are no lines or only sample lines, the experiment is invalid. Invalid samples should be re-tested with new samples.

Limitations of test methods

OTC rapid strep test could not distinguish between live and dead bacteria. Because of the presence of group A streptococcal antigen, patients who have recently received treatment for group A streptococcal or similar infections will still show positive results for a period of time after effective treatment. Pharyngitis can also be caused by bacteria other than group A streptococcus. When laboratory diagnosis does not match clinical manifestations, further diagnosis including bacterial culture should be made.
OTC rapid strep test could not distinguish between asymptomatic carriers and infected persons of group A streptococcus. If the number of antigens extracted is below the sensitivity, a negative result may be obtained. It is suggested that the negative results of OTC rapid strep test should be confirmed by culture. Using a swab in OTC rapid strep test for both vaccination and rapid diagnosis may reduce sensitivity.
Related News
  • Testing Time of One Step 10miu Pregnancy Test

    Testing Time of One Step 10miu Pregnancy Test

    August 8, 2018The principle of early pregnancy self-test is to detect HCG value, that is, human chorionic gonadotropin value. The hormone, which is produced by the placenta, typically occurs within a few days of co...view
  • Characteristics of HCV Detection Kit

    Characteristics of HCV Detection Kit

    July 26, 2018It shortens the "window period" of HCV infection, which is 70 days to 2 years shorter than the "window period" of HCV antibody detection currently used in the marketThe vaccine can be used to diagnose...view
  • How to Delay Menopause

    How to Delay Menopause

    July 26, 2018Menopause is inevitable, but it is believed that every woman wants it to be late. So how should you do to delay menopause?1.Get enough sleepModern women are very independent and self-reliant. They hav...view
  • What is salmonella?

    What is salmonella?

    August 8, 2018In 1885, Daniel Elmer Samon, an American veterinary microbiologist and pathologist, first isolated salmonella from swine cholera during the cholera epidemic. Salmonella can cause disease in humans, an...view
  • Simultaneous Diagnosis And Treatment Of Chlamydia High Detection Sensitivity Products From Shanghai

    Simultaneous Diagnosis And Treatment Of Chlamydia High Detection Sensitivity Products From Shanghai

    April 9, 2019In order to meet the needs of rapid detection and timely diagnosis of chlamydia trachomatis, Shanghai Biochemtron has provided detection reagents for female chlamydia test. According to data, there ar...view
  • Streptococcal Infection

    Streptococcal Infection

    August 8, 2018There are two types of infectious diseases caused by bacteria of the genus streptococcus entering the human body, one is acute tonsillitis, such as sepsis and pneumonia. The other is allergic diseases...view
  • TEL:+86-21-68129666
  • FAX:+86-21-68129222
  • EMAIL:[email protected]
  • ADDRESS:No.518, Qingdai Rd., International Medical Park, Pudong, 201318, Shanghai, P.R.China
35选7历史开奖号码 战大圣服务器怎么赚钱 快发彩票群 体球比分网 男鸭王是不是贼赚钱 广西快乐双彩 问道手游怎么小号赚钱吗 福建快三 德甲积分榜雪缘园 发音频赚钱 nba比分记录 做今日头条可以赚钱是真的吗 190足球即时指数手机版190KK 天津快乐10分 煤炭中间商怎么赚钱 wcba新浪体育 上古卷轴4怎么赚钱快