Articles tagged with Virus Testing
A Stanford University School of Medicine study found that self-collected nasal swab samples yielded results as accurate as those collected by healthcare workers, paving the way for widespread at-home testing. The study also explored how long infected individuals remain contagious and provided insights into viral shedding patterns.
Scientists at the University of Southampton are developing a rapid bedside test to diagnose neonatal Respiratory Distress Syndrome in premature babies. The test uses photonic technology and fingerprint spectroscopies, offering compact and versatile diagnostic capabilities.
Analysis suggests that up to 45 percent of COVID-19 cases are caused by asymptomatic carriers who can transmit the virus for extended periods. This highlights the need for expansive testing and contact tracing to mitigate the spread of the disease.
Researchers developed a blood test that detects viral exposure signatures linked to liver cancer risk. The test showed high accuracy in distinguishing patients with hepatocellular carcinoma from those with chronic liver disease and healthy volunteers. It has the potential to improve liver cancer screening and early detection.
The new RBD-based antibody test can measure the levels of a unique piece of the SARS-CoV-2 spike protein, correlating with neutralizing antibodies that provide immunity. This test is highly specific for COVID-19 and can identify asymptomatic virus infections and measure immunity levels in individuals.
COVID-19 antibody tests measure antibodies produced by the body after infection, providing insights into community spread. While early tests had questionable accuracy, recent developments have led to more reliable tests with high sensitivities and specificities, offering a better understanding of long-term protection.
A new study by Johns Hopkins Medicine found that SARS-CoV-2 testing can yield false negative results if conducted too early in the infection process. The test's accuracy improved when patients displayed symptoms of COVID-19, but even then had a 20% chance of a false negative result.
Researchers tested 27 published diagnostic PCR assays and found seven with potential sequence mismatch issues that may lead to underperforming or false-negative COVID-19 test results. This study highlights the importance of re-evaluating current tests periodically to ensure their efficacy in detecting circulating variants of the virus.
Researchers identified 27 protein biomarkers in COVID-19 patients' blood plasma linked to disease severity. These molecular signatures can precisely classify patients according to World Health Organization's coding criteria, enabling early diagnosis and treatment.
A study found that more than half of COVID-19 ICU patients developed clinically significant blood clots undetected by routine screenings. Researchers recommend using thromboelastography (TEG) tests to identify these patients and administer additional blood thinners.
A new report published in the New England Journal of Medicine examines the limitations of COVID-19 diagnostic tests, highlighting concerns over false-negative results. The study emphasizes the need for highly sensitive and validated tests to accurately declare individuals uninfected, ensuring safe reopening of communities.
A new mobile app assesses risk factors and key biomarkers from blood tests to produce a COVID-19 severity score. The tool has been validated using data from over 1,000 New York City patients, confirming its ability to identify those at high risk for severe cases.
A small study investigates the effect of sample inactivation on SARS-CoV-2 detection and finds that viral inactivation may contribute to false negatives. The researchers tested several inactivation methodologies, including TRIzol, which showed the least effect on RNA copy number, making it recommended for sample inactivation.
Researchers created an experimental diagnostic test for COVID-19 that visually detects the virus in 10 minutes, without advanced laboratory techniques. The test uses plasmonic gold nanoparticles to detect a color change when the virus is present.
A UK-based study analyzing 392,116 participants found that minority ethnic groups were more likely to test positive for COVID-19 and experience severe illness. Black and South Asian populations faced the highest risks, with individuals of Pakistani ethnicity particularly vulnerable.
A recent study on cruise ship passengers reveals that more than half tested positive for COVID-19, with only 19% displaying symptoms. This finding emphasizes the need for accurate global data on the prevalence of asymptomatic infections.
A new one-minute test developed at Ben-Gurion University can identify asymptomatic and affected carriers of COVID-19 with greater than 90% accuracy. The test kit costs approximately $50, making it less costly than standard PCR tests.
Researchers at Binghamton University are conducting a comprehensive study to investigate the efficacy of ultraviolet (UV) light in killing the novel coronavirus. The team is testing various parameters, including UV wavelength and exposure time, to determine its potential as a disinfection method for N95 medical masks.
A new study published in The Journal of Molecular Diagnostics found that phosphate buffered saline (PBS) can reliably transport COVID-19 samples to testing labs for up to 18 hours. This inexpensive and commonly available solution overcomes the shortage of virus transport media, enabling faster diagnosis and more widespread surveillance.
Researchers at Johns Hopkins Medicine have found that the RT-PCR test can produce false negatives in COVID-19 diagnosis, particularly in early stages of infection. The study suggests that the predictive value of these tests may be less accurate than previously thought.
Patients who previously had COVID-19 and clinically recovered were tested for viral shedding after hospital discharge. Reverse transcriptase-polymerase chain reaction tests found no evidence of ongoing viral transmission.
Researchers developed a smartphone-based technique to assess hemoglobin levels using spectral super-resolution spectroscopy, eliminating the need for bulky optical components. The new approach uses images of the inner eyelid to detect blood disorders such as anemia and sickle cell anemia
A study at Cedars-Sinai Medical Center found that only two asymptomatic pregnant women out of 82 tested positive for COVID-19, with the remaining 80 women being symptom-free. The findings suggest that hospitals may not need to conduct universal testing on all admitted pregnant patients.
Brazilian researchers found Zika virus can infect multiple regions of the placenta, highlighting the need to collect and store samples properly. Diagnostic tests must consider these regions to ensure accurate results.
The COVID-19 pandemic requires scalable testing technologies, but current methods vary widely, taking hours to complete and requiring extensive resources. Researchers assess various nucleic acid-based tests, highlighting the need for faster and more affordable alternatives.
Serological tests provide snapshot of infection history and immunity in populations. However, they are insufficient for issuing 'immune passports' due to limited specificity, and may lead to biases in testing practices.
Antibody tests are good enough to monitor COVID-19 spread and guide policy decisions, but understanding test characteristics is crucial for accurate results. By fine-tuning existing tests, policymakers can make informed decisions about interventions and population protection.
A study of 3,802 people tested for SARS-CoV-2 found that older age, male sex, deprivation, and ethnic minority status were linked to a positive test result. Chronic kidney disease and obesity also showed significant associations with a positive test.
Scientists at Northern Arizona University are developing a new test technology using Single Molecule Surface Enhanced Raman Spectroscopy to detect SARS-CoV-2 virus. The method aims to overcome challenges of existing tests, including false negatives and high costs.
A team of researchers from the University of Pittsburgh has developed a novel textile coating that can repel viruses and bacteria, making it potential candidate for creating safely reusable personal protective equipment (PPE). The coating was tested against adenovirus types 4 and 7 and shown to be effective in repelling these viruses.
A study found that consuming a single meal rich in saturated fat negatively affects concentration and attention, even when compared to a similar meal made with unsaturated fat. Participants with leaky gut syndrome also showed reduced focus after eating the high-fat meal.
A team of researchers from Boston University School of Medicine and Boston Medical Center adapted their lab to test patient samples for SARS-CoV-2 with a 'home-brew' assay, achieving over 3,000 tests with under 24-hour turnaround time. The test's flexibility and scalability make it an essential tool in the fight against COVID-19.
A researcher at Penn State is testing the efficacy of common disinfectants against viruses. The study aims to determine the optimal contact time for sanitizing surfaces to reduce the spread of COVID-19.
A new diagnostic approach in malaria has been adapted to track immunity to COVID-19, providing valuable details about when a person was exposed to the infection. The test can pinpoint how long ago a person was exposed, making it essential for tracking the spread of an infection and monitoring the effectiveness of control programs.
A new saliva test has detected early throat cancer in a person with no symptoms, highlighting a potential breakthrough in cancer screening. The test identified HPV-DNA in the saliva of an infected individual, allowing for early removal of the affected tonsil through surgery.
A new 15-minute antigen test for COVID-19 has shown high accuracy in detecting infected patients, potentially helping to identify new outbreak foci and implement quarantine measures. The test could also help screen healthcare workers and populations in low-income countries where molecular assays are limited.
Holonyak Lab faculty members receive NSF RAPID grants to shorten COVID-19 testing time. A point-of-care device using nasal fluid samples aims to detect COVID-19 within 10 minutes, while a new method combines capturing intact viruses with DNA nanostructures for immediate counting.
A nationwide effort is underway to test whether human milk contains the SARS-CoV-2 virus, a critical question for breastfeeding mothers who test positive for COVID-19. The study, funded by the Bill and Melinda Gates Foundation, will provide comprehensive testing of human milk samples and inform health officials' advice.
Cima Universidad de Navarra researchers have developed a novel method for detecting COVID-19, achieving over 95% sensitivity in asymptomatic cases. The platform uses a ribonucleic acid (RNA) extraction method that allows for large-scale processing of samples, enabling efficient testing of populations.
Researchers compiled a special report on COVID-19 diagnostic tests, highlighting the need for fast, convenient, and accurate methods. The report provides an overview of molecular and serological assays underlying these tests, as well as over 200 diagnostic tests currently available.
A new guidance statement has been developed by a team from the Society of Vascular & Interventional Neurology (SVIN) to improve ways to treat acute large vessel occlusion strokes during the COVID-19 crisis. The recommendations aim to minimize exposure to healthcare workers while providing optimal care to patients.
A fast and sensitive antibody test for SARS-CoV-2 has been developed by researchers at the American Chemical Society. The test can accurately diagnose COVID-19 cases and monitor patient recovery in just 10 minutes.
Researchers adapt a safe procedure from blood banking for use in coronavirus diagnostics, combining samples from up to 30 individuals in a single test tube. This approach significantly expands testing capacity and saves resources, particularly when infection rates are low.
The American Geriatrics Society has published a policy brief outlining recommendations for federal, state, and local governments to address COVID-19 concerns in assisted living facilities. The guidelines prioritize resource needs, patient transfers, and public health priorities, aiming to empower healthcare workers on the frontlines of...
Researchers have developed a graphene-based sensor that can detect biomarkers with high sensitivity, allowing for quick and simple disease diagnosis. The sensor uses the deformation of a single atomic sheet to trap biomarkers, which generates force deforming the graphene into a dome shape.
Researchers have developed a fast and low-cost diagnostic test using inkjet-printed antibodies, potentially reducing coronavirus testing wait times to 30 minutes. The D4 assay tool has shown promise in detecting SARS-Cov-2 antigens with high accuracy, making it a promising solution for point-of-care diagnosis.
Researchers at UT Dallas have developed a promising method for remotely stimulating activity in deep brain regions using gold nanoparticles and lasers. The approach has the potential to improve tests for viruses, including influenza and COVID-19, by increasing sensitivity and reducing healthcare costs.
A study in Shenzhen, China found that contact tracing and isolation reduced the length of time people were infectious by 2 days, confirming new cases in an average of 3.2 days compared to 5.5 days without contact tracing.
Researchers have created a new antibody test to measure COVID-19 infection and immunity. The test detects the presence of antiviral antibodies, allowing individuals who are potentially immune to be identified and care for patients with minimal risk.
Scientists developed a novel RT-LAMP assay to detect SARS-CoV-2 genomic RNA, achieving sensitivity comparable to RT-qPCR. The method can be run in decentralized facilities, providing faster test services for more people and overcoming limitations of centralized testing.
A new, $50 smartphone-based testing device can detect viral and bacterial pathogens in under 30 minutes, providing a rapid solution for pandemic testing. The device uses a small cartridge containing reagents that break open the pathogen's outer shell to gain access to its RNA.
A 'do it yourself' breathing circuit using readily available intensive care accessories can ventilate two critically ill patients at once, but its use is fraught with ethical issues and unclear pros outweigh cons. Clinicians should only consider this approach as a last resort due to the need for close patient matching and potential harm.
A study by Newcastle University and NHS Trust found that COVID-19 infection rates among patient-facing NHS staff were similar to those in non-clinical roles, suggesting current isolation protocols are sufficient. The research also showed that social distancing measures led to a flattening of the growth curve of positive tests.
A non-invasive low-cost ventilator has been designed and tested by UB researchers, providing efficient respiratory support to patients. The prototype adapted to spontaneous breathing rhythm and provided a feeling of breathing relief similar to commercial devices.
Researchers have developed a field-effect transistor-based biosensor that can detect SARS-CoV-2 in nasopharyngeal swabs in less than one minute. The test discriminates between samples from sick and healthy patients without any sample preparation steps.
The Aalto University-developed decision model helps policymakers balance utilitarian and egalitarian objectives, allocating resources to achieve different population-level objectives. The model is not directly adapted to contagious diseases, but its relevance to testing remains unchanged.
Researchers at Ben-Gurion University of the Negev have developed an AI-based test that can speed COVID-19 testing eightfold, enabling faster detection of asymptomatic carriers. This method involves dividing samples into pools and mixing individual samples to identify positive cases after fewer tests.
Researchers are developing a universal virus enrichment tool that can enhance COVID-19 detection for various diagnostic assays, reducing false negatives and pandemic risks. The project aims to concentrate SARS-CoV-2 from low-viral-titer samples, improving asymptomatic patient detection.
The American Journal of Roentgenology review highlights the limitations of chest CT scans in diagnosing COVID-19 pneumonia. The authors recommend reserving CT for evaluation of complications or alternative diagnoses due to its potential for overestimation of sensitivity and specificity.
Scientists are working at breakneck speeds to develop new diagnostics, treatments, and vaccines for COVID-19. Researchers are testing existing drugs, developing brand-new diagnostics, and utilizing gene-editing tools like CRISPR to combat the novel coronavirus.