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About 910 results

How should a positive PCR test result for COVID-19 in an asymptomatic individual be interpreted and managed?
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7532802/
Medecine Et Maladies Infectieuses; Esteve C, Catherine FX et. al.

In December 2019 in Wuhan, China an unexplained outbreak of respiratory distress syndrome occurred. The causal agent was identified as SARS-CoV-2, a new beta coronavirus responsible for COVID-19, which brought about not only severe infections in approximately 20% of cases, but also asymptomatic infections in a still insufficiently known proportion of patients.

Screening of COVID-19 polymerase chain reaction test...
https://doi.org/10.1111/jog.14591
The Journal of Obstetrics and Gynaecology Research References; Okamura S, Akamatsu N et. al.

Dec 23rd, 2020 - A screening of coronavirus disease 2019 (COVID-19) polymerase chain reaction (PCR) tests using saliva for pregnant women and their partners was performed at all 12 maternity facilities located in Himeji city between May 29 and September 5, 2020. Pregnant women at 37 or more weeks of gestation or who experienced threatened labor and their p...

The clinical characteristic of eight patients of COVID-19 with positiv...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7272974
Journal of Medical Virology REFERENCES; Cao H, Ruan L et. al.

May 15th, 2020 - Corona virus disease 2019 (COVID-19) was caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). The phenomenon of positive real time reverse transcription polymerase chain reaction (RT-PCR) result of SARS-CoV-2 in recovered patients had occurred and the research about these patients was rare. In our study, we did a ...

Outcomes of symptom screening and universal COVID-19 reverse transcriptas...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7543774
Gastrointestinal Endoscopy; Bowyer B, Thukral C et. al.

Oct 11th, 2020 - Elective endoscopy resumed in our outpatient ambulatory center after instituting the preprocedure policy of a confirmed negative coronavirus disease 2019 (COVID-19) reverse transcriptase polymerase chain reaction (RT-PCR) status performed 72 hours before a scheduled procedure as mandated by the state of Illinois. In addition, all patients were re...

Assessment of Day-7 Postexposure Testing of Asymptomatic Contacts of COVID...
https://doi.org/10.15585/mmwr.mm7001a3
MMWR. Morbidity and Mortality Weekly Report; Jones A, Fialkowski V et. al.

Jan 7th, 2021 - On May 8, 2020, the Vermont Department of Health (VDH) issued a Health Update* recommending shortening the duration of quarantine for persons exposed to SARS-CoV-2, the virus that causes coronavirus disease 2019 (COVID-19). Exposed persons who were in quarantine could be tested by polymerase chain reaction (PCR) on or after quarantine day ...

SARS-CoV-2 Presence in the Saliva, Tears, and Cerumen of COVID-19 Patients.
https://doi.org/10.1002/lary.29218
The Laryngoscope BIBLIOGRAPHY; Hanege FM, Kocoglu E et. al.

Oct 23rd, 2020 - The emergence of a new coronavirus strain (SARS-CoV-2) in December 2019 from China led to a global pandemic. The lack of herd immunity against this virus and the possibility of viral spread from asymptomatic individuals is still a major challenge for the prevention of viral transmission. The aim of this study was to evaluate the presence of the virus in different bodily secretions...

Symptomatic pericardial effusion in the setting of asymptomatic COVID-...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7489591
Medicine Amoozgar B, Kaushal V et. al.

Sep 14th, 2020 - Infection with the severe acute respiratory coronavirus disease 2019 (COVID-19) has been shown to cause multi-organ involvement including cardiopulmonary serosal layers infection and inflammation. As a result, pericarditis and pericardial effusion may occur with or without COVID-19 related respiratory signs. Due to limitations in sensitivity and specifi...

Asymptomatic COVID-19 Infection Detected on 18F-FDG PET/CT Scan Do...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7740275
Clinical Nuclear Medicine; Pillenahalli Maheshwarappa R, Graham MM

Sep 21st, 2020 - A 69-year-old woman with multiple myeloma came to our department for F-FDG PET/CT scan for routine surveillance. The patient denied any history of fever, cough, shortness of breath, or body aches. F-FDG PET/CT scan from vertex to knees was performed. PET/CT images revealed extensive peripheral ground-glass opacities showing intense FDG uptake (SUVmax 12) involving bilateral lower lobes. Possibi...

Positive RT-PCR in urine from an asymptomatic patient with novel c...
https://doi.org/10.1080/23744235.2020.1766105
Infectious Diseases (London, England); Ren JG, Li DY et. al.

May 18th, 2020 - Introduction: With the emergence of novel coronavirus disease 2019 (COVID-19) in many countries, medical resources currently focus on the treatment of confirmed patients and screening of suspected cases. Asymptomatic patients may be contagious, which makes epidemic control difficult. We describe an asymptomatic patient with a positive real-time polym...

COVID-19 with repeated positive test results for SARS-CoV-2...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7538677
Journal of Medical Case Reports; Kanamoto M, Tobe M et. al.

Oct 8th, 2020 - Determining the infectiousness of patients with coronavirus disease 2019 is crucial for patient management. Medical staff usually refer to the results of reverse transcription polymerase chain reaction tests in conjunction with clinical symptoms and computed tomographic images. We report a case of a 62-year-old Japanese man who twice had positive and ne...

Consecutive false-negative rRT-PCR test results for SARS-CoV-2 in patient...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7323315
Journal of Medical Virology REFERENCES; Wang G, Yu N et. al.

Aug 11th, 2020 - This study reviewed the serial real-time reverse-transcription polymerase chain reaction (rRT-PCR) results of 37 patients admitted to our hospital in Wuhan, China, who had three or more sequential negative results before discharge. Of these 37 patients, 14 (~38%) had a positive rRT-PCR result after a negative result during co...

Duration of viral shedding in asymptomatic or mild cases of novel coronavirus di...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7289725
International Journal of Infectious Diseases : IJID : Official Publication of the International Society for Infectious Diseases; Miyamae Y, Hayashi T et. al.

Jun 14th, 2020 - Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which is the cause of novel coronavirus disease 2019 (COVID-19), was first reported in Wuhan, China, and now has spread across the world as a global pandemic. The propagation from asymptomatic polymerase chain reaction (PCR)-positive individuals represents a complicating ...

The Issue of Recurrently Positive Patients Who Recovered From COVID-19...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7313946
The Journal of Infectious Diseases; Zou Y, Wang BR et. al.

Jun 3rd, 2020 - The current discharge criteria for COVID-19 require that patients have 2 consecutive negative results for reverse transcription polymerase chain reaction (RT-PCR) detection. Here, we observed that recurrent positive RT-PCR test results in patients with 3 consecutive negative results (5.4%) were significantly dec...

Predictors of laboratory-positive COVID-19 in children and teenagers.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7584439
Public Health; Murillo-Zamora E, Aguilar-Sollano F et. al.

Nov 27th, 2020 - The aim of the study was to identify factors predicting laboratory-positive coronavirus disease 2019 (COVID-19) in pediatric patients with acute respiratory symptoms. We conducted a cross-sectional analysis of a prospective cohort study. Data from 1849 individuals were analyzed. COVID-19 was confirmed (reverse transcription-quantitative polymerase...

COVID-19 Outbreak at an Overnight Summer School Retreat - Wisconsin, July...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7640998
MMWR. Morbidity and Mortality Weekly Report; Pray IW, Gibbons-Burgener SN et. al.

Oct 29th, 2020 - During July 2-August 11, 2020, an outbreak of coronavirus disease 2019 (COVID-19) occurred at a boys' overnight summer school retreat in Wisconsin. The retreat included 152 high school-aged boys, counselors, and staff members from 21 states and territories and two foreign countries. All attendees were required to provide documentation of either a positive serologic ...

About 80% of Asymptomatic People With COVID-19 Develop Symptoms
https://www.staging.medscape.com/viewarticle/938195

Sep 27th, 2020 - Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. Approximately 20% of asymptomatic people who test positive for COVID-19 will remain symptom-free over time, according to two studies published September 22 in different journals. The researchers propose, therefore, that most asymptomatic...

About 80% of Asymptomatic People With COVID-19 Develop Symptoms
https://www.medscape.com/viewarticle/938195

Sep 27th, 2020 - Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. Approximately 20% of asymptomatic people who test positive for COVID-19 will remain symptom-free over time, according to two studies published September 22 in different journals. The researchers propose, therefore, that most asymptomatic...

An Outbreak of Covid-19 on an Aircraft Carrier.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7675688
The New England Journal of Medicine; Kasper MR, Geibe JR et. al.

Nov 11th, 2020 - An outbreak of coronavirus disease 2019 (Covid-19) occurred on the U.S.S. Theodore Roosevelt, a nuclear-powered aircraft carrier with a crew of 4779 personnel. We obtained clinical and demographic data for all crew members, including results of testing by real-time reverse-transcriptase polymerase chain reaction (rRT-PCR). All crew members...

Changing Age Distribution of the COVID-19 Pandemic - United States, May-A...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7537561
MMWR. Morbidity and Mortality Weekly Report; Boehmer TK, DeVies J et. al.

Oct 1st, 2020 - As of September 21, 2020, the coronavirus disease 2019 (COVID-19) pandemic had resulted in more than 6,800,000 reported U.S. cases and more than 199,000 associated deaths.* Early in the pandemic, COVID-19 incidence was highest among older adults (1). CDC examined the changing age distribution of the COVID-19 pandemic in the United States d...

18F-FDG PET/CT in Hodgkin Lymphoma With Unsuspected COVID-19.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7315831
Clinical Nuclear Medicine; Boulvard Chollet XLE, Romero Robles LG et. al.

Jun 10th, 2020 - We present an asymptomatic 70-year-old man referred for an F-FDG PET/CT for initial staging of a Hodgkin lymphoma. F-FDG PET/CT showed bilateral cervical lymphadenopathy (stage II). Incidentally, the CT demonstrated bilateral ground-glass opacities with low-grade F-FDG activity. CT findings were suspicious for COVID-19 pneumonitis. The COVID-19 reverse transcr...