COVID-19: Here's All You Need to Know About RT-PCR and Rapid Antigen Test
3 years, 6 months ago

COVID-19: Here's All You Need to Know About RT-PCR and Rapid Antigen Test

News 18  

COVID is COrona VIrus Disease caused by SARS COV 2 Severe Acute Respiratory Syndrome COrona Virus 2. True positive means test has detected the virus when virus is actually present in sample.. False positive means test has detected virus wrongly when virus is actually not present in the sample True negative means test has not detected any virus, in the sample actually having no virus. False negative means test has not detected the virus even if sample have virus. Sensitivity means power of test to detect virus in sample having virus i.e. Specificity means power of test to reject the virus when it is actually not present in sample i.e.

Positive Test Covid Value Need Virus Means Negative Sample Rna Detect Rtpcr Nucleic Acid Ct Value Sars Cov Swab Sample  sample  need  negative  detect  ct  rapid  covid19  means  positive  rtpcr  virus  value  antigen  know  test  heres

History of this topic

Infected by Covid, 70-year-old Bihar woman dies of heart attack
1 year, 8 months ago

Infected by Covid, 70-year-old Bihar woman dies of heart attack

Hindustan Times  

In the first reported death arising out of coronavirus in Bihar over the last three months, a 70-year-old woman from Makdumpur in Jehanabad district died of heart attack at the Anugrah Narayan Magadh Medical College Hospital in Gaya on Friday evening, health officials said. As soon as we got her RT-PCR report the next day, we immediately referred her to …

Concerns over accuracy of COVID rapid test results when first sick
2 years, 4 months ago

Concerns over accuracy of COVID rapid test results when first sick

LA Times  

At-home coronavirus screening has become a way of life for many Californians, but some medical experts are now cautioning that one test may not be enough to definitively determine whether someone is infected. “However, if you perform an at-home COVID-19 antigen test, you could get a false negative result.” World & Nation CDC director announces shake-up, citing COVID mistakes The …

My At-Home Rapid Test Is Negative, But Could I Still Have COVID?
2 years, 7 months ago

My At-Home Rapid Test Is Negative, But Could I Still Have COVID?

Huff Post  

LOADING ERROR LOADING In the age of omicron, where COVID’s attack rate is higher than previous variants, entire households and friend groups are getting sick. As variants have emerged, scientists have wondered if the new mutations could impact rapid tests’ ability to detect the changing virus — but this hasn’t been the case. A study from UMass Chan Medical School …

Chinese scientists develop prototype tool to test COVID-19 in 4 mins
2 years, 10 months ago

Chinese scientists develop prototype tool to test COVID-19 in 4 mins

China Daily  

BEIJING -- Chinese scientists have developed a molecular system that can provide COVID-19 testing results in less than four minutes. A research team from Shanghai-based Fudan University mentioned this portable prototype device in a study published recently in the journal Nature Biomedical Engineering, saying it can detect the traces of COVID-19-related genetic material quickly and accurately. The device is an …

Covid Virus May Remain Active, Transmissible for Longer Than Recommended Quarantine Period: Study
2 years, 10 months ago

Covid Virus May Remain Active, Transmissible for Longer Than Recommended Quarantine Period: Study

News 18  

Some people infected with SARS-CoV-2 may be able to transmit the virus for longer than the recommended quarantine period, without necessarily manifesting any symptoms during the final stage of the infection, a study suggests. “Of the 38 cases we tracked, two men and a woman were atypical in the sense that the virus was continuously detected in their organism for …

Scientists develop new COVID diagnosis test using X-rays: Will it replace RT-PCR testing?
2 years, 11 months ago

Scientists develop new COVID diagnosis test using X-rays: Will it replace RT-PCR testing?

Firstpost  

Experts who have designed this new method — using X-ray technology with Artificial Intelligence — say it is 98 per cent accurate and quicker than the conventional tests As the world grapples with the coronavirus pandemic, scientists in Scotland have developed a groundbreaking diagnosis test using X-rays. “Several countries are unable to carry out large numbers of tests because of …

Covid negative despite symptoms, being close to infected person? Here's why
2 years, 11 months ago

Covid negative despite symptoms, being close to infected person? Here's why

India Today  

Several people test negative for Covid-19 even after showing symptoms or when their family members have tested positive. Therefore, on the first day of symptoms, the test might show a negative result," said Dr Rajeev Jayadevan, clinical researcher advising the Covid task force, IMA Kochi, Kerala. Six days after the onset of symptoms is considered the optimal timing, but many …

AP yet to enhance RT-PCR tests to check Covid-19
2 years, 11 months ago

AP yet to enhance RT-PCR tests to check Covid-19

Deccan Chronicle  

Vijayawada: Though the centre has urged states and union territories to enhance Covid-19 tests, Andhra Pradesh government appears not yet fully geared to speed up RT-PCR tests. Strangely, the number of swab samples being collected presently is 20 per PHC, which comes as a surprise, as it delays the number of people being subject to RT-PCR tests. In addition, the …

Tested positive for COVID? Some people may remain infectious even after 10 days
2 years, 11 months ago

Tested positive for COVID? Some people may remain infectious even after 10 days

India TV News  

One in 10 people may still be infectious and can potentially spread the Covid virus even after the 10 day quarantine period, according to new research. The study, published in the International Journal of Infectious Diseases, found that 13 per cent of people still exhibited clinically-relevant levels of virus after 10 days, meaning they could potentially still be infectious. "While …

An ‘awful’ month of Covid-19 lies ahead, doctor says, but preventative measures will still be key
2 years, 11 months ago

An ‘awful’ month of Covid-19 lies ahead, doctor says, but preventative measures will still be key

CNN  

CNN — While the highly transmissible Omicron variant continues to drive up Covid-19 cases and hospitalizations – and the numbers are likely to get worse before they get better – health experts say it’s critical Americans continue safe practices to prevent infections. An ensemble forecast from the US Centers for Disease Control and Prevention published Wednesday predicts that more than …

Queenslanders wanting COVID-19 test to 'do the right thing' or return to work left frustrated and confused
2 years, 11 months ago

Queenslanders wanting COVID-19 test to 'do the right thing' or return to work left frustrated and confused

ABC  

Queensland's COVID-19 testing clinics are so overwhelmed, many people are being turned away without getting swabbed, while others are going to extreme lengths to get tested to protect family members, satisfy work and childcare requirements, or to have elective surgery. Key points: You should get a rapid antigen test if you need to leave home quarantine or have been around …

Demand for rapid at-home COVID-19 tests is so high, pharmacies are rationing
3 years ago

Demand for rapid at-home COVID-19 tests is so high, pharmacies are rationing

LA Times  

One highly sought-after item to prepare for safer holiday gatherings is frustratingly hard to find — at-home rapid COVID-19 tests. Sax said he wouldn’t visit his parents if he had any signs of a respiratory illness, such as a scratchy throat, even if the rapid test results showed a negative result. “I would not go visit grandma with a respiratory …

COVID-19 | Karnataka to test vulnerable groups fornightly
3 years ago

COVID-19 | Karnataka to test vulnerable groups fornightly

The Hindu  

To augment and strengthen COVID-19 surveillance in view of clusters being reported in a few districts, the State Health Department has revised the daily testing targets from the existing 60,000 to 80,000. “Students and teachers in colleges and high schools, staff of hotels and restaurants, shop-keepers in malls/ markets, catering staff and door delivery personnel, factory personnel, office goers, service …

Delhi: RT-PCR accounted for over 70% of total Covid tests conducted in last 3 months
3 years, 4 months ago

Delhi: RT-PCR accounted for over 70% of total Covid tests conducted in last 3 months

India Today  

RT-PCR tests accounted for over 70 per cent of the total tests conducted to detect coronavirus in Delhi in the last three months, according to government data. RT-PCR tests accounted for 71.42 per cent of the total 21.88 lakh tests conducted in June and 75.17 per cent of the 21.41 lakh tests conducted in May. In February, March and April; …

RT-PCR Accounted for Over 70% of Total Covid Tests Conducted in Delhi in Last 3 Months
3 years, 4 months ago

RT-PCR Accounted for Over 70% of Total Covid Tests Conducted in Delhi in Last 3 Months

News 18  

RT-PCR tests accounted for over 70 per cent of the total tests conducted to detect coronavirus in Delhi in the last three months, according to government data. RT-PCR tests accounted for 71.42 per cent of the total 21.88 lakh tests conducted in June and 75.17 per cent of the 21.41 lakh tests conducted in May. In February, March and April; …

Here's How to Measure Immunity Against COVID-19
3 years, 6 months ago

Here's How to Measure Immunity Against COVID-19

News 18  

According to medical experts, the production of antibodies — microscopic protein components –are used to measure immunity against any virus. This means that when someone is infected, their body produces antibodies which attacks the virus by fighting the infection and protects us from getting that infection in the future. Dr Bruce Walker, an immunology expert from Harvard Medical School, told …

Why some test negative for Covid-19 despite showing symptoms
3 years, 7 months ago

Why some test negative for Covid-19 despite showing symptoms

India Today  

The scale of the Covid-19 spread is such in the country that there is a chance that you already know somebody who showed symptoms of coronavirus infection, but the laboratory test returned “negative” for SARS-CoV-2. But why do machines or Covid-19 test kits return a negative report for a positive person? Correct results from a laboratory depend on many things: …

New RT-PCR kit 97.3% sensitive in detecting Covid mutants: All you need to know
3 years, 7 months ago

New RT-PCR kit 97.3% sensitive in detecting Covid mutants: All you need to know

Hindustan Times  

Union health minister Dr Harsh Vardhan on Wednesday said the new RT-PCR kit developed by Sree Chitra Turunal Institute for Medical Science and Technology under the department of sciences and technology is 97.3 per cent sensitive. Union minister Harsh Vardhan on Wednesday tweeted about the new RT-PCR kit. ICMR okays new RT-PCR kit with ‘high accuracy’ Here is all you …

A CT scan for COVID merits a word of caution
3 years, 7 months ago

A CT scan for COVID merits a word of caution

The Hindu  

There are broadly three reasons why we perform tests in clinical medicine: diagnosis, etiognosis, and prognosis. Data from studies The Cochrane pooled together all the available data from studies conducted over the last year to try and test the accuracy of CT scans in diagnosing COVID-19. Since an RT-PCR itself misses 30% of people who have COVID-19, a chest CT …

Explained: Difference Between Antibody and RT-PCR Tests & How to Read Covid-19 Reports
3 years, 7 months ago

Explained: Difference Between Antibody and RT-PCR Tests & How to Read Covid-19 Reports

News 18  

While most symptoms of Covid-19 resemble that of a common cold or flu, a test helps to determine if at all it is coronavirus or some other viral infection. Also known as serology test, this procedure is done to determine if you have been infected with coronavirus in the past by detecting covid-19 antibodies in your blood. “Antibody tests should …

More the Infections, More Chances of Variants: Dr Gagandeep Kang
3 years, 7 months ago

More the Infections, More Chances of Variants: Dr Gagandeep Kang

The Quint  

“It can happen that the variants may be able at some point in the future to be able to escape detection. That’s much more likely with the rapid antigen test than it is with the RT-PCR test. Now if the virus antigen changes its shape then the rapid antibody test won’t work anymore. So in fact it became a diagnostic …

Have Covid symptoms but a negative RT-PCR report? Read on
3 years, 8 months ago

Have Covid symptoms but a negative RT-PCR report? Read on

India Today  

India Today TV speaks to top doctors to understand what a person should do if he has symptoms but his RT-PCR test doesn’t confirm Covid-19. DR. HEMANT THACKER, CONSULTANT PHYSICIAN & CARDIOMETABOLIC SPECIALIST, BREACH CANDY, JASLOK, BHATIA AND RELIANCE HOSPITALS, MUMBAI: We’re not treating the test report, we’re treating the patient. If the symptoms worsen, and RT-PCR is negative, treatment …

What CT value in COVID-19 RT-PCR test is; steps to calculate
3 years, 8 months ago

What CT value in COVID-19 RT-PCR test is; steps to calculate

Firstpost  

Amid a surge in COVID-19 cases, the Maharashtra government earlier this week had requested the Centre to reduce the cycle threshold value cut-off from 35 to 24 for positivity rate under the RT-PCR test. An individual is considered COVID-19 negative, only if the CT value is 35 in the RT-PCR test. So, if the CT value is below 35 in …

Covid Clinical Symptoms, CT Scans/X-Rays Should Be Used to Rule Out False Negatives: Experts
3 years, 8 months ago

Covid Clinical Symptoms, CT Scans/X-Rays Should Be Used to Rule Out False Negatives: Experts

News 18  

Amid a staggering surge in Covid-19 cases, India’s top experts on Monday said RT-PCR tests detect coronavirus in around 80 per cent of the cases, so clinical features and CT scans/chest X-rays should be used to rule out false negatives in symptomatic patients followed by a repeat test after 24 hours. Amid SARS COV-2 ‘variants of concern’ circulating, they said …

Maharashtra's daily Covid-19 case count crosses 60,000-mark, second time in 3 days
3 years, 8 months ago

Maharashtra's daily Covid-19 case count crosses 60,000-mark, second time in 3 days

India Today  

In what can be seen as a sign of the worsening Covid-19 situation in Maharashtra, the state on Tuesday again reported more than 60,000 cases. In the last 24 hours, Maharashtra has reported 60,212 new Covid-19 cases, a considerable rise from Monday when it reported 51,751 new cases. Earlier in the day, the Union health ministry pulled up the Maharashtra …

There's a lot of misinformation around about COVID-19 PCR tests. We asked an expert to clear it up
3 years, 9 months ago

There's a lot of misinformation around about COVID-19 PCR tests. We asked an expert to clear it up

ABC  

CoronaCheck is RMIT ABC Fact Check's weekly email newsletter dedicated to fighting the misinformation infodemic surrounding the coronavirus outbreak. Billed by Australia's medicines and therapeutic regulatory agency as the "gold standard for diagnosis of COVID-19", polymerase chain reaction tests are used globally to identify positive COVID-19 cases. "There is no evidence to suggest asymptomatic individuals will no longer count toward …

Covid-19 testing: Everything you know about Covid-19 tests, interpreting results, reliability
4 years ago

Covid-19 testing: Everything you know about Covid-19 tests, interpreting results, reliability

Firstpost  

Tests are useful when used correctly, and when you know the limits of the information they give you. Many people don’t understand what a test can and can’t tell you about your risk — and wrongly think a test result that comes back negative guarantees they can’t spread the virus to others. Cons: Because these tests have to go through …

All You Need to Know About the Different Types of Covid-19 Tests
4 years ago

All You Need to Know About the Different Types of Covid-19 Tests

News 18  

The crucial role played by accurate diagnostic testing of COVID-19 infection has been at the very core of the concerted efforts against this potentially-fatal viral infection. The RT-PCR test detects the presence of this viral RNA in host samples like nasal or oral swabs, saliva, etc and thereby you get a positive or negative result for the virus’ presence in …

T-cell test is EIGHT TIMES better at detecting whether someone was infected with coronavirus
4 years, 1 month ago

T-cell test is EIGHT TIMES better at detecting whether someone was infected with coronavirus

Daily Mail  

A new type of test may be more effective at determining whether someone already had coronavirus compared to widely-used antibody tests. New research from the manufacturer, Adaptive Biotechnologies, which is based in Seattle, found that the test was eight times better at detecting past COVID-19 infection than a commercially available antibody test. A new type of test looks for T-cells, …

Serosurveys point to inadequacies in India’s COVID-19 testing strategy
4 years, 2 months ago

Serosurveys point to inadequacies in India’s COVID-19 testing strategy

Firstpost  

Over the past few months, a series of serosurveys for detecting the spread of COVID-19 have been carried out in India. The findings from these surveys points to a huge disparity in the expected number of COVID-19 cases, based on the seroprevalence, and the official number of cases reported from RT-PCR/rapid testing across the country. Testing capacity needs to be …

Pvt Firm Supplies 12.5 Lakh 'Sub-standard' RT-PCR Test Kits to Maharashtra, Minister Promises Action
4 years, 2 months ago

Pvt Firm Supplies 12.5 Lakh 'Sub-standard' RT-PCR Test Kits to Maharashtra, Minister Promises Action

News 18  

Maharashtra received 12.50 lakh sub-standard RT-PCR Covid-19 testing kits from GCC Biotech Ltd, state Health Minister Rajesh Tope said on Tuesday, while adding that legal action would be initiated against the private company. Addressing reporters in Jalna, Tope said that the National Institute of Virology, a unit of the Indian Council of Medical Research, had discovered that the quality of …

Fear of second Covid-19 wave as people moving out: Uddhav Thackeray
4 years, 2 months ago

Fear of second Covid-19 wave as people moving out: Uddhav Thackeray

Live Mint  

Maharashtra Chief Minister Uddhav Thackeray on Saturday expressed apprehensions of a "second wave" of coronavirus transmission as more people are moving out for work, and called for stricter compliance with norms. We are allowing asymptomatic patients to remain under home quarantine, but they are moving out and infecting others," the chief minister said. "If results of antigen tests return negative …

Covid-19: RT-PCR test for symptomatic antigen negative patients in Delhi
4 years, 2 months ago

Covid-19: RT-PCR test for symptomatic antigen negative patients in Delhi

Live Mint  

New Delhi: The Delhi government has asked all districts to retest all symptomatic patients, who have tested negative for COVID-19 on rapid antigen test, using the more reliable RT-PCR method, after it found the process was not followed in over 1,400 cases. According to the government, Northwest district had the maximum 870 cases where symptomatic antigen negatives were not followed …

Puzzled Rajasthan MP Found Covid-19 Positive in Lok Sabha Tests Negative in Jaipur, Tweets Reports
4 years, 3 months ago

Puzzled Rajasthan MP Found Covid-19 Positive in Lok Sabha Tests Negative in Jaipur, Tweets Reports

News 18  

Rajasthan MP Hanuman Beniwal has questioned the authenticity of the Covid-19 diagnostic tests after he received two contrary reports, one which said he tested positive and the other which said he tested negative. Puzzled by the different results, he tweeted, “I got checked for Covid-19 in Lok Sabha premises, which came positive. Beniwal, chief of the RLP, was among the …

80% of patients detected at ‘early stage’, helps prevent deaths: Punjab govt
4 years, 3 months ago

80% of patients detected at ‘early stage’, helps prevent deaths: Punjab govt

Hindustan Times  

Early identification of Covid-19 infection through timely testing has played a pivotal role in Punjab’s strategy to fight the pandemic, the state government has claimed. Till September 3, Punjab has reported 58,515 cases of covid-19, of which 41,271 have recovered. “Over 80% of coronavirus patients in Punjab were detected during a median period of 2–6 days after the infection, when …

I Had COVID-19 But Tested Negative 5 Times. Here's What You Should Know About Testing.
4 years, 3 months ago

I Had COVID-19 But Tested Negative 5 Times. Here's What You Should Know About Testing.

Huff Post  

The author, shown wearing protective gear, returned to work in the emergency department of her hospital on July 3, 2020. “According to study, published in the Annals of Internal Medicine, there was a 67% chance of patients receiving a false-negative if they were tested within four days of contracting the virus.” While I waited to see if I would experience …

Dengue virus tests may sometimes return ‘positive’ for coronavirus, says study
4 years, 4 months ago

Dengue virus tests may sometimes return ‘positive’ for coronavirus, says study

The Hindu  

Can dengue be sometimes mistaken for COVID-19? Two independent research studies — one from a group in Israel and another from the Council of Scientific and Industrial Research-Indian Institute of Chemical Biology in Kolkata — show that tests specific to check for dengue sometimes led to a positive SARS-CoV-2 test and this, the scientists warn, could lead to misdiagnoses and …

Covid-19: What you need to know today
4 years, 4 months ago

Covid-19: What you need to know today

Hindustan Times  

Delhi’s second sero survey has shown that 29.1% of the roughly 15,000 people surveyed across the Capital’s 11 districts have been exposed to the Sars-CoV-2 virus that causes the coronavirus disease – and are, therefore, immune. As HT’s Binayak Dasgupta put it in an article summarising the key findings of several immunity-related studies, and their importance: “…a person once infected …

Rapid test reliance may slow Covid-19 fight
4 years, 4 months ago

Rapid test reliance may slow Covid-19 fight

Hindustan Times  

Testing for the coronavirus disease in Delhi has become heavily reliant on antigen tests, which experts say are not as reliable as RT-PCR tests and end up skewing crucial data that could hamper the city’s fight to contain the virus. The Delhi government insists that it has relied on antigen tests only to increase testing in the Capital due to …

Fewer COVID-19 re-tests mar Delhi’s testing strategy
4 years, 5 months ago

Fewer COVID-19 re-tests mar Delhi’s testing strategy

The Hindu  

Only 1 in 200 of those who tested negative in an antigen test in Delhi to detect possible coronavirus cases were re-tested, a fraction that epidemiologists say is too low given what is known about the disease. RADT’s limitation The limitation of the RADT is that they may miss as many as half of those who are actually positive, which …

PCR testing is a double-edged sword
4 years, 5 months ago

PCR testing is a double-edged sword

The Hindu  

The government has allowed SARS-CoV-2 polymerase chain reaction testing in many government and private laboratories. The boon and bane of PCR testing are in its capacity to amplify even one viral gene segment in the sample to generate a detectable signal — a positive test; it is a boon because it accurately detects the presence of virus but a bane …

Coronavirus | ‘RT-PCR will remain the gold standard for all viral infections'
4 years, 6 months ago

Coronavirus | ‘RT-PCR will remain the gold standard for all viral infections'

The Hindu  

Dr. P. Srinivasan, technical director at Neuberg Diagnostics and Chairman & Co-Founder of Be The Cure Registry and Jeenomics of Jeevan Stem Cell Foundation, Chennai, spoke to G. Ananthakrishnan on current testing options for the novel coronavirus SARS-CoV-2, when to think of taking the test, state of antibody testing. So if you look at sensitivity it is 50% to 80%, …

Negative covid test doesn\'t mean you are immune from virus: Doctors
4 years, 6 months ago

Negative covid test doesn\'t mean you are immune from virus: Doctors

Deccan Chronicle  

Hyderabad: Doctors state that those who have tested negative once are not immune from the virus will not infecting them. A senior doctor explained, “If a person tested negative today, it does not mean that after exposure to a positive patient the chances of infection are completely ruled out. The virus is expected to pass through maximum people and if …

ICMR recommends use of faster COVID-19 testing kit
4 years, 6 months ago

ICMR recommends use of faster COVID-19 testing kit

The Hindu  

The Indian Council of Medical Research has recommended the use of Standard Q COVID-19 Ag antigen detection test in containment zones and healthcare settings in combination with the RT-PCR test. Read | Urban slum population most vulnerable to COVID-19 spread: ICMR “A positive test in antigen, result of which is available in 30 minutes, should be considered as a true …

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