Association of mRNA Vaccination With Clinical and Virologic Features of COVID-19 Among US Essential and Frontline Workers.

Importance: Data on the epidemiology of mild to moderately severe COVID-19 are needed to inform public health guidance. Objective: To evaluate associations between 2 or 3 doses of mRNA COVID-19 vaccine and attenuation of symptoms and viral RNA load across SARS-CoV-2 viral lineages. Design, Setting, and Participants: A prospective cohort study of essential and frontline workers in Arizona, Florida, Minnesota, Oregon, Texas, and Utah with COVID-19 infection confirmed by reverse transcriptase-polymerase chain reaction testing and lineage classified by whole genome sequencing of specimens self-collected weekly and at COVID-19 illness symptom onset. This analysis was conducted among 1199 participants with SARS-CoV-2 from December 14, 2020, to April 19, 2022, with follow-up until May 9, 2022, reported. Exposures: SARS-CoV-2 lineage (origin strain, Delta variant, Omicron variant) and COVID-19 vaccination status. Main Outcomes and Measures: Clinical outcomes included presence of symptoms, specific symptoms (including fever or chills), illness duration, and medical care seeking. Virologic outcomes included viral load by quantitative reverse transcriptase-polymerase chain reaction testing along with viral viability. Results: Among 1199 participants with COVID-19 infection (714 [59.5%] women; median age, 41 years), 14.0% were infected with the origin strain, 24.0% with the Delta variant, and 62.0% with the Omicron variant. Participants vaccinated with the second vaccine dose 14 to 149 days before Delta infection were significantly less likely to be symptomatic compared with unvaccinated participants (21/27 [77.8%] vs 74/77 [96.1%]; OR, 0.13 [95% CI, 0-0.6]) and, when symptomatic, those vaccinated with the third dose 7 to 149 days before infection were significantly less likely to report fever or chills (5/13 [38.5%] vs 62/73 [84.9%]; OR, 0.07 [95% CI, 0.0-0.3]) and reported significantly fewer days of symptoms (10.2 vs 16.4; difference, -6.1 [95% CI, -11.8 to -0.4] days). Among those with Omicron infection, the risk of symptomatic infection did not differ significantly for the 2-dose vaccination status vs unvaccinated status and was significantly higher for the 3-dose recipients vs those who were unvaccinated (327/370 [88.4%] vs 85/107 [79.4%]; OR, 2.0 [95% CI, 1.1-3.5]). Among symptomatic Omicron infections, those vaccinated with the third dose 7 to 149 days before infection compared with those who were unvaccinated were significantly less likely to report fever or chills (160/311 [51.5%] vs 64/81 [79.0%]; OR, 0.25 [95% CI, 0.1-0.5]) or seek medical care (45/308 [14.6%] vs 20/81 [24.7%]; OR, 0.45 [95% CI, 0.2-0.9]). Participants with Delta and Omicron infections who received the second dose 14 to 149 days before infection had a significantly lower mean viral load compared with unvaccinated participants (3 vs 4.1 log10 copies/µL; difference, -1.0 [95% CI, -1.7 to -0.2] for Delta and 2.8 vs 3.5 log10 copies/µL, difference, -1.0 [95% CI, -1.7 to -0.3] for Omicron). Conclusions and Relevance: In a cohort of US essential and frontline workers with SARS-CoV-2 infections, recent vaccination with 2 or 3 mRNA vaccine doses less than 150 days before infection with Delta or Omicron variants, compared with being unvaccinated, was associated with attenuated symptoms, duration of illness, medical care seeking, or viral load for some comparisons, although the precision and statistical significance of specific estimates varied.

Caracterização das infecções que acometem o usuário no momento do diagnóstico para o Hiv/Aids / Characterization of infections that affect the user at the moment of diagnosis for Hiv/Aids / Caracterización de las infecciones que afectan a los usuarios en el momento del diagnóstico del Vih/Sida

: O estado do Pará, de 2009 a 2019, apresentou um aumento de 46,5% na taxa de detecção de aids. O que destaca a importância de estudos para a avaliação e acompanhamento deste público. Objetivo: Analisar as infecções que acometem os usuários de um centro de referência no momento de seu diagnóstico para a infecção pelo HIV. Métodos: Estudo descritivo, realizado em um centro de referência da cidade de Santarém, Pará. A amostra foi de 332 prontuários de pacientes diagnosticados para o HIV nos anos de 2016 e 2017. A coleta de dados buscou informações sociodemográficas, clínicas e imunológicas dos pacientes no momento do diagnóstico para a infecção pelo HIV. Os dados foram organizados e analisados por estatística descritiva e inferencial, adotando- se p<0,05. Resultados: Observou-se prevalência do sexo masculino (67%), faixa etária de 15-24 anos (32,2%), solteiros (59%), com vínculo empregatício (64,5%), contagem de linfócitos T CD4+ ≥200 céls/mm3 (54,8%) e carga viral detectável (75,3%). A Candidíase (25%) e a Tuberculose (25%) predominaram como infecções oportunistas (IO), e a Sífilis (67,5%) como outras infecções. Conclusão: Conforme método proposto e os dados já informados, conclui-se que o diagnóstico para a Sífilis se associou ao sexo masculino, bem como a situação de contagem de linfócitos T CD4+ <200 céls/mm3 se associou com a presença de alguma infecção oportunista, da instalação da Candidíase e da Tuberculose.

Introduction: The state of Pará, from 2009 to 2019, showed a 46.5% increase in the AIDS detection rate. What stands out the importance of studies for the evaluation and monitoring of this public. Objective: Analyze the infections that affect the users of a reference center at the moment of diagnosis for HIV infection. Methods: Descriptive study, carried out in a reference center in the city of Santarém, Pará. The sample consisted of 332 records of patients diagnosed with HIV in the years 2016 and 2017. The data collection sought sociodemographic, clinical and immunological information of the patients at the moment diagnosis for HIV infection. The data were organized and analyzed using descriptive and inferential statistics, adopting p <0.05. Results: There was a prevalence of males (67%), aged 15-24 years (32.2%), single (59%), with employment (64.5%), CD4 + T lymphocyte count ≥200 cells/mm3 (54.8%) and detectable viral load (75.3%). Candidiasis (25%) and Tuberculosis (25%) predominated as opportunistic infections (IO), and Syphilis (67.5%) as other infections. Conclusion: According to the proposed method and the data already reported, it is concluded that the diagnosis for Syphilis was associated with the male gender, as well as the situation of CD4 + T lymphocyte count <200 cells/mm3 was associated with the presence of some opportunistic infection, of the installation of Candidiasis and Tuberculosis.

Introducción: El estado de Pará, de 2009 a 2019, presentó un aumento del 46,5% en la tasa de detección del SIDA. Lo que pone de manifiesto la importancia de los estudios para la evaluación y el seguimiento de este público. Objetivo: Analizar las infecciones que sufren los usuarios de un centro de referencia en el momento de su diagnóstico de infección por VIH. Métodos: Estudo descritivo, realizado em um centro de referência da cidade de Santarém, Pará. La muestra fue de 332 historias clínicas de pacientes diagnosticados de VIH en los años 2016 y 2017. La recogida de datos buscaba información sociodemográfica, clínica e inmunológica de los pacientes en el momento del diagnóstico de la infección por VIH. Los datos se organizaron y analizaron mediante estadísticas descriptivas e inferenciales, adoptando p<0,05. Resultados: Se observó la prevalencia del sexo masculino (67%), el grupo de edad de 15 a 24 años (32,2%), la soltería (59%), el empleo (64,5%), el recuento de linfocitos T CD4+ ≥200 células/mm3 (54,8%) y la carga viral detectable (75,3%). La candidiasis (25%) y la tuberculosis (25%) predominaron como infecciones oportunistas (IO), y la sífilis (67,5%) como otras infecciones. Conclusión: De acuerdo con el método propuesto y los datos ya informados, se concluye que el diagnóstico de Sífilis se asocia al sexo masculino, así como la situación de contagio de linfocitos T CD4+ <200 células/mm3 se asocia a la presencia de alguna infección oportunista, a la instauración de la Candidiasis y a la Tuberculosis.

Incorporating temporal distribution of population-level viral load enables real-time estimation of COVID-19 transmission.

Many locations around the world have used real-time estimates of the time-varying effective reproductive number ([Formula: see text]) of COVID-19 to provide evidence of transmission intensity to inform control strategies. Estimates of [Formula: see text] are typically based on statistical models applied to case counts and typically suffer lags of more than a week because of the latent period and reporting delays. Noting that viral loads tend to decline over time since illness onset, analysis of the distribution of viral loads among confirmed cases can provide insights into epidemic trajectory. Here, we analyzed viral load data on confirmed cases during two local epidemics in Hong Kong, identifying a strong correlation between temporal changes in the distribution of viral loads (measured by RT-qPCR cycle threshold values) and estimates of [Formula: see text] based on case counts. We demonstrate that cycle threshold values could be used to improve real-time [Formula: see text] estimation, enabling more timely tracking of epidemic dynamics.

Balancing Statistical Power and Risk in HIV Cure Clinical Trial Design.

BACKGROUND: Analytical treatment interruptions (ATI) are pauses of antiretroviral therapy (ART) in the context of human immunodeficiency virus (HIV) cure trials. They are the gold standard in determining if interventions being tested can achieve sustained virological control in the absence of ART. However, withholding ART comes with risks and discomforts to trial participant. We used mathematical models to explore how ATI study design can be improved to maximize statistical power, while minimizing risks to participants. METHODS: Using previously observed dynamics of time to viral rebound (TVR) post-ATI, we modelled estimates for optimal sample size, frequency, and ATI duration required to detect a significant difference in the TVR between control and intervention groups. Groups were compared using a log-rank test, and analytical and stochastic techniques. RESULTS: In placebo-controlled TVR studies, 120 participants are required in each arm to detect 30% difference in frequency of viral reactivation at 80% power. There was little statistical advantage to measuring viral load more frequently than weekly, or interrupting ART beyond 5 weeks in a TVR study. CONCLUSIONS: Current TVR HIV cure studies are underpowered to detect statistically significant changes in frequency of viral reactivation. Alternate study designs can improve the statistical power of ATI trials.

Influence of the Delta Variant and Vaccination on the SARS-CoV-2 Viral Load.

Studies comparing SARS-CoV-2 nasopharyngeal (NP) viral load (VL) according to virus variant and host vaccination status have yielded inconsistent results. We conducted a single center prospective study between July and September 2021 at the drive-through testing center of the Toulouse University Hospital. We compared the NP VL of 3775 patients infected by the Delta (n = 3637) and Alpha (n = 138) variants, respectively. Patient's symptoms and vaccination status (2619 unvaccinated, 636 one dose and 520 two doses) were recorded. SARS-CoV-2 RNA testing and variant screening were assessed by using Thermo Fisher® TaqPath™ COVID-19 and ID solutions® ID™ SARS-CoV-2/VOC evolution Pentaplex assays. Delta SARS-CoV-2 infections were associated with higher VL than Alpha (coef = 0.68; p ≤ 0.01) independently of patient's vaccination status, symptoms, age and sex. This difference was higher for patients diagnosed late after symptom onset (coef = 0.88; p = 0.01) than for those diagnosed early (coef = 0.43; p = 0.03). Infections in vaccinated patients were associated with lower VL (coef = -0.18; p ≤ 0.01) independently of virus variant, symptom, age and sex. Our results suggest that Delta infections could lead to higher VL and for a longer period compared to Alpha infections. By effectively reducing the NP VL, vaccination could allow for limiting viral spread, even with the Delta variant.

Predominance of antibody-resistant SARS-CoV-2 variants in vaccine breakthrough cases from the San Francisco Bay Area, California.

Associations between vaccine breakthrough cases and infection by different SARS coronavirus 2 (SARS-CoV-2) variants have remained largely unexplored. Here we analysed SARS-CoV-2 whole-genome sequences and viral loads from 1,373 persons with COVID-19 from the San Francisco Bay Area from 1 February to 30 June 2021, of which 125 (9.1%) were vaccine breakthrough infections. Vaccine breakthrough infections were more commonly associated with circulating antibody-resistant variants carrying ≥1 mutation associated with decreased antibody neutralization (L452R/Q, E484K/Q and/or F490S) than infections in unvaccinated individuals (78% versus 48%, P = 1.96 × 10-8). Differences in viral loads were non-significant between unvaccinated and fully vaccinated cases overall (P = 0.99) and according to lineage (P = 0.09-0.78). Symptomatic vaccine breakthrough infections had comparable viral loads (P = 0.64), whereas asymptomatic breakthrough infections had decreased viral loads (P = 0.023) compared with infections in unvaccinated individuals. In 5 cases with serial samples available for serologic analyses, vaccine breakthrough infections were found to be associated with low or undetectable neutralizing antibody levels attributable to an immunocompromised state or infection by an antibody-resistant lineage. Taken together, our results show that vaccine breakthrough infections are overrepresented by antibody-resistant SARS-CoV-2 variants, and that symptomatic breakthrough infections may be as efficient in spreading COVID-19 as unvaccinated infections, regardless of the infecting lineage.

First Human Cosavirus Detection From Cerebrospinal Fluid in Hospitalized Children With Aseptic Meningitis and Encephalitis in Iran.

OBJECTIVE: Human cosavirus (HCosV) is a newly recognized virus that seems to be partly related to nonpolio flaccid paralysis and acute gastroenteritis in pediatric patients. However, the relationship between HCosV and diseases in humans is unclear. To assess an investigation for the occurrence of HCosV among pediatric patients involved in meningitis and encephalitis, we implemented a real-time quantitative polymerase chain reaction assay for detection and quantification of HCosV in stool specimens. MATERIALS AND METHODS: In this study, a total of 160 cerebrospinal fluid samples from September 2019 to October 2020 were collected from presenting pediatric patients with meningitis and encephalitis in a Karaj hospital, Iran. After viral RNA extraction, the real-time quantitative polymerase chain reaction was performed to amplify the 5'Un-Translated Region region of the HCosV genome and viral load was analyzed. RESULTS: Of the 160 samples tested, the HCosV genomic RNA was detected in 2/160 (1.25%) of samples. The minimum viral load of HCosV was 3.5 × 103 copies/mL from 4 years male patient. The maximum viral load was determined to be 2.4 × 105 copies/mL in one sample obtained from 3.5 years female patient. CONCLUSIONS: This is the first documentation of HCosV detection in cerebrospinal fluid samples that better demonstrates relation of HCosV with neurologic diseases including meningitis and encephalitis. Also, these results indicate that HCosV has been circulating among Iranian pediatric patients.

Changes in SARS-CoV-2 viral load and mortality during the initial wave of the pandemic in New York City.

Public health interventions such as social distancing and mask wearing decrease the incidence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, but it is unclear whether they decrease the viral load of infected patients and whether changes in viral load impact mortality from coronavirus disease 2019 (COVID-19). We evaluated 6923 patients with COVID-19 at six New York City hospitals from March 15-May 14, 2020, corresponding with the implementation of public health interventions in March. We assessed changes in cycle threshold (CT) values from reverse transcription-polymerase chain reaction tests and in-hospital mortality and modeled the impact of viral load on mortality. Mean CT values increased between March and May, with the proportion of patients with high viral load decreasing from 47.7% to 7.8%. In-hospital mortality increased from 14.9% in March to 28.4% in early April, and then decreased to 8.7% by May. Patients with high viral loads had increased mortality compared to those with low viral loads (adjusted odds ratio 2.34). If viral load had not declined, an estimated 69 additional deaths would have occurred (5.8% higher mortality). SARS-CoV-2 viral load steadily declined among hospitalized patients in the setting of public health interventions, and this correlated with decreases in mortality.

SARS-CoV-2 infection: Initial viral load (iVL) predicts severity of illness/outcome, and declining trend of iVL in hospitalized patients corresponds with slowing of the pandemic.

BACKGROUND: Hospitalization of patients infected with the severe acute respiratory syndrome virus 2 (SARS-CoV-2) have remained considerable worldwide. Patients often develop severe complications and have high mortality rates. The cycle threshold (Ct) value derived from nasopharyngeal swab samples using real time polymerase chain reaction (RT-PCR) may be a useful prognostic marker in hospitalized patients with SARS-CoV-2 infection, however, its role in predicting the course of the pandemic has not been evaluated thus far. METHODS: We conducted a retrospective cohort study which included all patients who had a nasopharyngeal sample positive for SARS-CoV-2 between April 4 -June 5, 2020. The Ct value was used to estimate the number of viral particles in a patient sample. The trend in initial viral load on admission on a population level was evaluated. Moreover, patient characteristics and outcomes stratified by viral load categories were compared and initial viral load was assessed as an independent predictor of intubation and in-hospital mortality. RESULTS: A total of 461 hospitalized patients met the inclusion criteria. This study consisted predominantly of acutely infected patients with a median of 4 days since symptom onset to PCR. As the severity of the pandemic eased, there was an increase in the percentage of samples in the low initial viral load category, coinciding with a decrease in deaths. Compared to an initial low viral load, a high initial viral load was an independent predictor of in-hospital mortality (OR 5.5, CI 3.1-9.7, p < 0.001) and intubation (OR 1.82 CI 1.07-3.11, p = 0.03), while an initial intermediate viral load was associated with increased risk of inpatient mortality (OR 1.9, CI 1.14-3.21, p = 0.015) but not with increased risk for intubation. CONCLUSION: The Ct value obtained from nasopharyngeal samples of hospitalized patients on admission may serve as a prognostic marker at an individual level and may help predict the course of the pandemic when evaluated at a population level.

Factors affecting adherence to antiretroviral therapy among children and adolescents living with HIV in the Mbita Sub-County Hospital, Homa Bay- Kenya.

BACKGROUND: Adequate adherence to antiretroviral therapy (ART) is key to the successful treatment of children and adolescents living with HIV. Continuous ART Adherence is the key factor for virologic suppression and stability of the immune system and prevents the occurrence of opportunistic infections. Children and adolescents struggle with adherence to ART for various reasons, including a poor psychosocial support system and clinic attendance. OBJECTIVES: To describe the uptake of HIV treatment services among children and adolescents in the Mbita Sub-County Hospital, Homa Bay and determine how schooling, clinic attendance, and type of pill/regimen affect adherence to ART and viral suppression. METHODS: This retrospective study was conducted at the Mbita Sub-County Hospital. Medical chart data was abstracted from the hospital files of children and adolescents between the ages of 0-19 years on antiretroviral therapy, between the periods of October 2016 and September, 2017. Data was analyzed using measures of central tendency, and cross-tabulations were done to compare schooling, clinic attendance, type of pill/regimen and viral suppression. Univariate and multivariate logistic regression analyses were conducted to determine associations between groups. RESULTS: According to patient files reviewed, majority of patients, 244(91.4%) were enrolled into care within 2 weeks of HIV diagnosis according to guidelines, and 193(73.1 %) remained enrolled in care at end of study period. An overall viral suppression of 74.2 %( 132) was recorded. Of all the files reviewed, 121(74.7%) of patients attending school suppressed against 11(68.8 %) out of school, p=0.280. Suppression among Day and boarding reported at 78.6 %( 11) and 74.8 %( 113) of those out of school, respectively, p=0.533. Participants in primary school, 17(85.0%) suppressed better than those in secondary school, 102(73.4%), p=0.263. Keeping clinic appointments among eligible patient files reviewed decreased from 83.1% at 3 months, p=0.016, to 76.6%, p=0.526 at 6 months and to 52.9% at 12 months, p=0.278. Only 3- month clinic appointment return rates and Enhanced Adherence Counseling (EAC) were significant predictors of viral supression χ2 (2) = 0.280, p = 0.869 (> 0.05). CONCLUSION: The clinic attendance rate within the first 3 months, and Enhanced Adherence Counseling (EAC) were significant predictors of viral suppression, and therefore adherence to antiretroviral therapy.

Cytomegalovirus Viral Load in Transplanted Patients Using the NeuMoDx™ (Qiagen) Automated System: A 1-Month Experience Feedback.

Cytomegalovirus (CMV) reactivations represent a significant morbidity and mortality problem in transplant patients. Reliable and rapid measurement of CMV viral load is a key issue for optimal patient management. We report here the evaluation of NeuMoDx™ (Qiagen) in a routine hospital setting (University Hospitals of Marseille, France) in comparison with our classical reference technique R-GENE. During one month, 719 CMV viral loads from 507 patients were measured in parallel in both techniques. Using the ROC (receiver operating characteristic) curve and our biological experience we suggest that values <52 IU/mL (geometric mean) correspond to negative samples, values >140 IU/mL (Fowlkes-Mallows index) correspond to quantifiable positive results and values ranging from 52 to 140 IU/mL represent non-quantifiable positive results. Follow-up of 15 transplant patients who developed CMV reactivation during the study showed that NeuMoDx™ provided higher viral load measurement during the first two weeks of follow-up for three patients. These important intra-individual variations resulted in a significant median increase considering the whole data set (6.7 points of difference expressed as a percentage of the initial viral load). However, no difference between the two techniques was noticeable after two weeks of treatment. Subsequent to this first study we conclude that NeuMoDx™, used with optimized logistics and an adapted threshold, allows a rapid CMV viral load measurement and that its use does not lead to any difference in patient management compared to the reference technique R-GENE®.

The Comparison of Honeybee Viral Loads for Six Honeybee Viruses (ABPV, BQCV, CBPV, DWV, LSV3 and SBV) in Healthy and Clinically Affected Honeybees with TaqMan Quantitative Real-Time RT-PCR Assays.

The viral loads of acute bee paralysis virus (ABPV), black queen cell virus (BQCV), chronic bee paralysis virus (CBPV), deformed wing virus (DWV), Lake Sinai virus 3 (LSV3), and sacbrood bee virus (SBV) were determined in samples with the use of quantitative TaqMan real-time reverse transcription and polymerase chain reaction (RT-qPCR). A total of 108 samples of healthy adult honeybees from four differently located apiaries and samples of honeybees showing different clinical signs of viral infections from 89 apiaries were collected throughout Slovenia. The aim of this study was to discover correlations between viral loads and clinical signs in adult honeybees and confirm previously set threshold viral load levels between healthy and clinically affected honeybees. Within this study, two new RT-qPCR assays for quantification of LSV3 and SBV were developed. Statistically significant differences in viral loads of positive samples were identified between healthy and clinically affected honeybees for ABPV, CBPV, DWV, and SBV, while for BQCV and LSV3, no statistical differences were observed between both groups. Despite high detected LSV3 prevalence and viral loads around 6.00 log10 viral copies/bee, this lineage probably has a limited impact on the health status of honeybee colonies. The determined viral loads between 3.94 log10 and 13.17 log10 in positive samples for six viruses, collected over 10 consecutive months, including winter, present additional information of high viral load variations in healthy honeybee colonies.

Impact of the COVID-19 pandemic situation on HIV care in Liège, Belgium.

BACKGROUND: Background: The COVID-19 pandemic and associated containment measures dramatically affected the health care systems including the screening of human immunodeficiency virus and the management people living with HIV around the world by making the access to preventive care services and specific medical monitoring more difficult. OBJECTIVE: Objective: To study the impact of the COVID-19 pandemic on the holistic care of people living with HIV in Liège (Belgium). METHODS: Methods: In this retrospective observational study conducted in Liège University Hospital, we compared the out-patient follow-up of HIV-infected individuals as well as the number of new HIV diagnoses between 2019 and 2020 and between the different waves of the COVID-19 pandemic in 2020. RESULTS: Results: In 2020, when compared to 2019, we observed a significant decrease in the number of new HIV diagnoses, especially during the first wave of the pandemic, and in the number of consultations undertaken by sexual health services, psychologists and specialists in infectious diseases at our HIV clinic. We also observed a decrease in the number of viral load assays and blood CD4 + T-cells count analyses performed, although we found less patients with HIV plasma viral load above 400 copies per mL in 2020. Finally, we noted a significant reduction in terms of screening of our HIV-infected patients for hepatitis C, syphilis, colorectal and anal cancers and hypercholesterolemia. CONCLUSIONS: Conclusions: Our experience exhibits the deleterious impact of the COVID-19 pandemic on the HIV care and the need to implement new strategies to guarantee its continuum.

COVID-19 viral load not associated with disease severity: findings from a retrospective cohort study.

BACKGROUND: Being able to use COVID-19 RT-PCR Ct values as simple clinical markers of disease outcome or prognosis would allow for the easy and proactive identification and triaging of high-risk cases. This study's objective was thus to explore whether a correlation exists between COVID-19 viral loads, as indicated by RT-PCR Ct values, and disease severity, as indicated by respiratory indices. RESULTS: A multi-centre cross-sectional retrospective study was conducted, using data obtained from Bahrain's National COVID-19 Task force's centralised database. The study period ranged from May 2, 2020 to July 31, 2020. A multivariable logistic regression was used to assess for a correlation using data from a total of 1057 admitted COVID-19 cases. The covariates adjusted for included sex, age, presentation, and comorbidities. In our cohort, Ct value showed no statistical significance for an association with requirement for oxygenation on admission (Odds ratio 1.046; 95%CI 0.999 to 1.096, p = 0.054). CONCLUSION: Viral load, as indicated by Ct values, did not seem to be associated with requirement for oxygenation on admission in our cohort. We postulate however that time since onset of symptom may have acted as an unaccounted-for confounder. As such, RT-PCR Ct values may not be a useful prognostic clinical tool in isolation.

Correlations Between Olfactory Psychophysical Scores and SARS-CoV-2 Viral Load in COVID-19 Patients.

OBJECTIVES/HYPOTHESIS: The aim of this study was to evaluate the correlations between the severity and duration of olfactory dysfunctions (OD), assessed with psychophysical tests, and the viral load on the rhino-pharyngeal swab determined with a direct method, in patients affected by coronavirus disease 2019 (COVID-19). STUDY DESIGN: Prospective cohort study. METHODS: Patients underwent psychophysical olfactory assessment with Connecticut Chemosensory Clinical Research Center test and determination of the normalized viral load on nasopharyngeal swab within 10 days of the clinical onset of COVID-19. RESULTS: Sixty COVID-19 patients were included in this study. On psychophysical testing, 12 patients (20% of the cohort) presented with anosmia, 11 (18.3%) severe hyposmia, 13 (18.3%) moderate hyposmia, and 10 (16.7%) mild hyposmia with an overall prevalence of OD of 76.7%. The overall median olfactory score was 50 (interquartile range [IQR] 30-72.5) with no significant differences between clinical severity subgroups. The median normalized viral load detected in the series was 2.56E+06 viral copies/106 copies of human beta-2microglobulin mRNA present in the sample (IQR 3.17E+04-1.58E+07) without any significant correlations with COVID-19 severity. The correlation between viral load and olfactory scores at baseline (R2  = 0.0007; P = .844) and 60-day follow-up (R2  = 0.0077; P = .519) was weak and not significant. CONCLUSIONS: The presence of OD does not seem to be useful in identifying subjects at risk for being super-spreaders or who is at risk of developing long-term OD. Similarly, the pathogenesis of OD is probably related to individual factors rather than to viral load and activity. LEVEL OF EVIDENCE: 4 Laryngoscope, 131:2312-2318, 2021.

Ubiquitous expression of HBsAg from integrated HBV DNA in patients with low viral load.

BACKGROUND & AIMS: Loss of serum HBsAg is a hallmark of spontaneous and therapy induced resolution of HBV infection, since it generally reflects a profound decrease in viral replication. However, integrated HBV DNA can contribute to HBsAg expression independent of viral replication. The relative contributions of these sources of HBsAg are not well understood. Specifically, it is not known whether actively transcribed HBV integration could spread throughout the entire liver. METHODS: The relative distribution of HBsAg and HBV RNA in liver biopsy tissue from HBeAg-negative (HBe-) patients was analyzed by immunohistochemistry and in situ hybridization (ISH), respectively. Frozen biopsy tissue was used for molecular analysis of intrahepatic viral RNA, virus-host chimeric transcripts and viral DNA. RESULTS: Immunohistochemistry and ISH analysis revealed HBsAg and HBV RNA positivity in virtually all hepatocytes in the liver of some HBe- patients despite very low viremia. Reverse transcription quantitative PCR and RNA-sequencing analysis confirmed high expression levels of HBV envelope-encoding RNAs. However, the amount of viral transcriptional template (covalently closed circular (ccc)DNA) was too low to support this ubiquitous HBV RNA expression. In contrast, levels of total cellular HBV DNA were consistent with ubiquitous HBV integration. Finally, RNA-sequencing revealed the presence of many HBV-host chimeric transcripts with the potential for HBsAg expression. CONCLUSIONS: Transcriptionally active HBV integration can extend to the entire liver in some HBe- patients. This can lead to ubiquitous HBsAg expression independent of HBV replication. In such patients, HBsAg is probably not a clinically useful surrogate marker for viral resolution or functional cure. LAY SUMMARY: Loss of serum hepatitis B surface antigen (HBsAg) indicates resolution of HBV infection. However, integrated HBV DNA can contribute to HBsAg production independently of viral replication. We investigated the extent of HBsAg-producing viral integration in the livers of patients with low serum viral loads. Our findings suggest that transcriptionally active HBV integration can extend to the entire liver in some patients, questioning the clinical utility of HBsAg as a surrogate marker for viral replication.

Impact of RNA degradation on influenza diagnosis in the surveillance system.

BACKGROUND: The continuous evolution of influenza viruses is monitored by the World Health Organization Global Influenza Surveillance and Response System. Sample quality is essential for surveillance quality. METHODS: To evaluate the RNA degradation of clinical samples, influenza-like illness samples were collected from four sentinel hospitals, and seasonal influenza was tested by real-time reverse transcription polymerase chain reaction and quantified by digital reverse transcription polymerase chain reaction at different time points. RESULTS: RNA degradation was observed in the majority of samples eight days after sample collection. A significant and faster rate of RNA content reduction was observed in low viral load samples (<10 copies/µl) than in high viral load samples (>10 copies/µl), stored at 2 to 8°C for up to eight days. RNase P (RNP) RNA, which is a key indicator to evaluate sample collection quality, was detected. Sample collection quality was uneven in different hospitals. CONCLUSION: Low viral load samples increase the risk of false negatives due to RNA degradation to undetectable levels.

HIV-1 Infection Alters the Viral Composition of Plasma in Men Who Have Sex with Men.

Altered gut virome and expanded abundance of certain viruses were found in HIV-1-infected individuals. It remains largely unknown how plasma virus composition changes during HIV-1 infection and antiretroviral therapy (ART). We performed viral metagenomic analysis on viral particles enriched from human plasma from 101 men who have sex with men (MSM) with or without HIV-1 infection and whether or not on ART and compared the differences in the plasma virome. An increased plasma viral abundance of main eukaryotic viruses was observed during HIV-1 infection in MSM, especially in AIDS patients (CD4+ T cell counts of <200). Anellovirus, pegivirus and hepatitis B virus (HBV) were the most abundant blood-borne viruses detected among MSM and HIV-1-infected individuals, and anellovirus and pegivirus were closely related to HIV-1 infection. High diversity of anelloviruses was found mostly in HIV-1-infected MSM, and their abundance was positively correlated with the HIV-1 viral load, but negatively correlated with both CD4+ T cell counts and CD4+/CD8+ ratio; in contrast, the abundance of pegivirus showed opposite correlations. ART usage could restore the plasma virome toward that of HIV-1-negative individuals. These data showed an expansion in abundance of certain viruses during HIV-1 infection, indicating the higher risk of shedding some blood-borne viruses in these individuals. These investigations indicate that both anellovirus and pegivirus may play certain roles in HIV disease progression.IMPORTANCE Though an increasing number of studies have indicated the existence of an interaction between the virome and human health or disease, the specific role of these plasma viral components remains largely unsolved. We provide evidence here that an altered plasma virome profile is associated with different immune status of HIV-1 infection. Specific resident viruses, such as anellovirus and pegivirus, may directly or indirectly participate in the disease progression of HIV-1 infection. These results can help to determine their clinical relevance and design potential therapies.

Hepatitis B virus infection and its determinants among HIV positive pregnant women: Multicenter unmatched case-control study.

BACKGROUND: Hepatitis B virus (HBV) kills millions of people globally; it is worse in pregnant women. HBV and Human Immune Virus (HIV) co-infection is associated with increased liver diseases such as cirrhosis and hepatocellular carcinoma. This study aimed at identifying the determinants of HBV infection among HIV-positive pregnant women. METHODS: A multicentre unmatched case-control study was conducted among 109 cases (HBV/HIV co-infected) and 327 controls (HIV positive) pregnant women in seven hospitals of the Eastern Amhara region. Interview and chart review data collection techniques were employed by trained personnel. A binary logistic regression model was used to identify independent predictors of hepatitis B virus infection. Variables with a p-value of <0.05 and 95% confidence interval for odds ratio not containing 1 considered independent predictors of HBV infection. RESULTS: The findings of this study revealed that history of STI [AOR, 1.97, 95%CI, 1.09-3.56], hospital admission [AOR, 3.08, 95%CI, 1.69-5.61], traditional delivery care [AOR, 3.31, 95%CI, 1.72-6.37], family history of HBV [AOR, 3.33, 95%CI, 1.72-6.37], presence of opportunistic infections [AOR, 0.23, 95%CI, 0.12-0.58], viral load [AOR, 7.58, 95%CI, 3.18-8.01], CD4 count [AOR, 2.15, 95% CI, 1.01-4.59], anaemia [AOR, 3.07, 95% CI, 1.71-5.51] and unsafe sex [AOR, 1.98, 95%CI, 1.09-3.61] had a statistically significant association with HBV infection. CONCLUSIONS: Several exposure variables had statistically significant association with HBV infection. High Viral Load appeared to be the largest predictor of HBV infection in HIV patients. Therefore, targeted interventions such as behavioral change intervention for unsafe sex and STI should be in place, and screening tests and treatment at the early stage of conception for both partners is necessary.