About 81,620 results

How should a positive PCR test result for COVID-19 in an asymptomatic individual be interpreted and managed?
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.

The clinical characteristic of eight patients of COVID-19 with positiv...
Journal of Medical Virology REFERENCES; Cao H, Ruan L et. al.

May 16th, 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 ...

SARS-CoV-2 Presence in the Saliva, Tears, and Cerumen of COVID-19 Patients.
The Laryngoscope; Hanege FM, Kocoglu E et. al.

Oct 24th, 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...

Consecutive false-negative rRT-PCR test results for SARS-CoV-2 in patients after clinic...
Journal of Medical Virology REFERENCES; Wang G, Yu N et. al.

Aug 12th, 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 convalescence, and 5 (~14%) had a positive rRT-PCR result after two cons...

Positive RT-PCR Test Results in Patients Recovered From COVID...
JAMA Lan L, Xu D et. al.

Feb 28th, 2020 - Positive RT-PCR Test Results in Patients Recovered From COVID-19.|2020|Lan L,Xu D,Ye G,Xia C,Wang S,|genetics,isolation & purification,diagnosis,diagnosis,

Screening for COVID-19: Patient factors predicting positive PCR...
Infection Control and Hospital Epidemiology; Challener DW, Challener GJ et. al.

May 20th, 2020 - To inform the efficient allocation of testing resources, we evaluated the characteristics of those tested for COVID-19 to determine predictors of a positive test. Recent travel and exposure to a confirmed case were both highly predictive of positive testing. Symptom-based screening strategies alone may be inadequate to control the ongoing pandemic.

Positive RT-PCR in urine from an asymptomatic patient with novel coronavirus 2019 infec...
Infectious Diseases (London, England); Ren JG, Li DY et. al.

May 19th, 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...

An Outbreak of Covid-19 on an Aircraft Carrier.
The New England Journal of Medicine; Kasper MR, Geibe JR et. al.

Nov 12th, 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...

Asymptomatic screening for COVID-19 in cancer patients still debated
Caleb Rans, PharmD

Feb 9th, 2021 - Asymptomatic screening of cancer patients receiving anticancer therapy detected a very low rate of COVID-19 in a retrospective study. Of more than 2,000 patients, less than 1% were found to be COVID-19 positive on asymptomatic screening, an investigator reported at the AACR Virtual Meeting: COVID-19 and Cancer (Abstract S09-04).

Impact of coronavirus disease 2019 (COVID-19) pre-test prob...
Infection Control and Hospital Epidemiology; Gubbay JB, Rilkoff H et. al.

Aug 10th, 2021 - Performance characteristics of SARS-CoV-2 nucleic acid detection assays are understudied within contexts of low pre-test probability, including screening asymptomatic persons without epidemiological links to confirmed cases, or asymptomatic surveillance testing. SARS-CoV-2 detection without symptoms may represent presymptomatic or asymptomatic infection, resol...

Positive RT-PCR Test Results in Patients Recovered From COVID-19

Feb 27th, 2020 - Previous studies on coronavirus disease 2019 (COVID-19) mainly focused on epidemiological, clinical, and radiological features of patients with confirmed infection. Little attention has been paid to the follow-up of recovered patients.

About 80% of Asymptomatic People With COVID-19 Develop Symptoms

Sep 28th, 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...

Asymptomatic COVID-19 Transmission in China Confirmed?

Feb 21st, 2020 - A young woman from Wuhan, China visited five family members, who all contracted novel coronavirus, COVID-19, in the first-ever documented case of an asymptomatic carrier with normal chest CT imaging results, researchers found. The woman, age 20, was afebrile and had no respiratory symptoms, including cough and sore throat, no gastrointestinal symptoms, no significant abnorm...

Virolactia in an Asymptomatic Mother with COVID-19.
Breastfeeding Medicine : the Official Journal of the Acad... Bastug A, Hanifehnezhad A et. al.

Jul 3rd, 2020 - Background: Limited data are available on the perinatal and postnatal transmission of novel coronavirus disease 2019 (COVID-19). The Centers for Disease Control and Prevention (CDC) and World Health Organization (WHO) recommended breastfeeding with necessary precautions to mothers with COVID-19. Case Presentation: A 20-year-old pregnant woman with no symptoms ...

Experience With False-Positive Test Results on the TaqPath Real-Time Reve...
Archives of Pathology & Laboratory Medicine; Lin L, Carlquist J et. al.

Nov 26th, 2020 - Experience With False-Positive Test Results on the TaqPath Real-Time Reverse Transcription-Polymerase Chain Reaction Coronavirus Disease 2019 (COVID-19) Testing Platform.|2020|Lin L,Carlquist J,Sinclair W,Hall T,Lopansri BK,|

Symptomatic pericardial effusion in the setting of asymptomatic COVID-...
Medicine Amoozgar B, Kaushal V et. al.

Sep 15th, 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 specificity of...

What Does Asymptomatic COVID-19 Look Like Under the Surface?

Jun 18th, 2020 - Asymptomatic individuals carrying SARS-CoV-2 shed the virus longer than those with COVID-19 symptoms, with other lab findings suggesting the symptomatic patients mounted more robust immune responses, a small study in China found. Median duration of viral shedding among 37 asymptomatic patients was 19 days (interquartile range 15-26; range 6-45) versus 14 days ...

Presumed Asymptomatic Carrier Transmission of COVID-19.
JAMA Bai Y, Yao L et. al.

Feb 23rd, 2020 - Presumed Asymptomatic Carrier Transmission of COVID-19.|2020|Bai Y,Yao L,Wei T,Tian F,Jin DY,|virology,diagnostic imaging,transmission,diagnostic imaging,transmission,

Symptomatic versus asymptomatic COVID-19: does it impact placental...
The Journal of Maternal-fetal & Neonatal Medicine : the O... Ramey-Collier K, Craig AM et. al.

Feb 18th, 2022 - This study sought to assess the impact of COVID-19 on placental vasculature in the context of maternal symptomatology - comparing asymptomatic to symptomatic pregnant patients - and disease severity - comparing pregnant patients with mild, moderate, severe, and critical COVID-19 infection. PCR-confirmed COVID-19 positive pregnant pa...

Symptoms COVID 19 Positive Vapers Compared to COVID 19 Positive Non-vapers.
Journal of Primary Care & Community Health; McFadden DD, Bornstein SL et. al.

Jan 7th, 2022 - The purpose of the present study was to assess and describe the severity of symptoms reported by Covid-19 positive patients who vaped (smoked e-cigarettes) when compared to those who did not vape or smoke at the time of the diagnosis of Covid-19. Patients from this study are from a well-characterized patient cohort collected at Mayo Clinic between March 1, 202...