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INTRODUCTION: Although no case of COVID-19 transmission through transfusion has been reported, blood transfusion service (BTS) continues to implement pre-donation and post-donation measures to minimise the risk. In year 2022, when local healthcare system was badly impacted by a major outbreak, it opened an opportunity to re-examine the viraemia risk in these asymptomatic donors. MATERIALS AND METHODS: Records were retrieved from blood donors who reported COVID-19 after donation and follow-up was also made for recipients who received their blood. Blood samples at donation were tested for SARS-CoV-2 viraemia by single-tube nested real-time RT-PCR assay designed to detect most SARS-CoV-2 variants including the prevailing delta and omicron variants. RESULTS: From 1 January to 15 August 2022, the city with 7.4 M inhabitants recorded 1 187 844 COVID-19 positive cases and 125 936 successful blood donations were received. 781 donors reported to the BTS after donation with 701 being COVID-19 related (including close contact and symptoms respiratory tract infection). 525 COVID-19 were positive at the time of call back or follow-up. Of the 701 donations, they were processed into 1480 components with 1073 discarded upon donors' call back. For remaining 407 components, no recipient was found to have adverse event or COVID-19 positive. 510 samples from the above 525 COVID-19 positive donors were available and all tested negative for SARS-CoV-2 RNA. DISCUSSION: With the negative SARS-CoV-2 RNA in blood donation samples and follow up data in transfusion recipients, the risk of transfusion transmitted COVID-19 appears negligible. However, current measures remains important in securing blood safety with ongoing surveillance of their effectiveness.
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Introduction: Emerging preclinical and clinical studies suggest that altered gut microbiome composition and functions are associated with coronavirus 2019 (COVID-19) severity and its long-term complications. Aims & Methods: Aim: To prove COVID-19 outcome is associated with gut microbiome status in population-based settings. Method(s): Gut metagenomic data of the adult population consisting of 2871 subjects from 16 countries including Bangladesh, Canada, China, Denmark, France, Germany, India, Israel, Italy, Kazakhstan, Netherlands, Peru, Spain, Sweden, the United Kingdom, and the United States were obtained from ExperimentHub through R, and dynamic data of COVID-19 incidence and mortality between January 22, 2020 and December 8, 2020 in each country was obtained from Johns Hopkins Coronavirus Resource Center. An adjusted stable mortality rate was used to represent the mortality rate in these countries and we correlated mortality data with the mean relative abundance of healthy adult gut microbiome species. Stable mortality rate is defined as the ratio of the number of new deaths and new COVID- 19 confirmed cases. We chose the longest duration of stable period before the vaccination programme for all countries to calculate stable mortality rate. Result(s): The gut microbiome beta-diversity is significantly higher in the countries with high stable mortality rates. After excluding bacteria species with low prevalence in selected countries, four bacteria species were identified as a negative correlation with stable mortality rate and positive correlation with biosynthesis-related pathways. Amongst them, one specie is well-known beneficial butyrate producers and underrepresented in COVID-19 patients. Conclusion(s): Population-based microbiome signatures with the stable mortality rate of COVID-19 in different countries suggest that altered gut microbiome composition and functions are associated with mortality of COVID-19. Microbiotamodulation may offer hope to reduce COVID-19 severity and mortality.
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Background IBD patients on immune-modulatory therapies are considered high-risk for SARS-CoV-2 infection. Direct comparisons of serological responses to SARS-CoV-2 infection in IBD patients across different continents and medications are lacking. We performed SARS-CoV-2 sero-surveillance of IBD patients prior to vaccination at seven large tertiary centres in Asia, Europe, and North America. Methods Clinical data and sera were collected from, 2,213 IBD patients receiving routine care at institutions in Belgium, Canada, Hong Kong, India, Japan, the United Kingdom, and the United States between, 26 May, 2020 and, 24 September, 2021 (Table, 1). Sera were taken prior to vaccination. Clinical data were collected through patient questionnaires and medical records. Antibody reactivity to the SARS-CoV-2 spike protein was assessed using the Roche SARS-CoV-2 anti-spike total antibody and/or Siemens Healthineers COV2T anti-spike total antibody assays, which showed, 99.4% concordance. Univariate analysis was performed to evaluate association between individual variables and sero-status. Results The pre-vaccination seroprevalence of antibodies to SARS-CoV-2 in IBD patient varied widely according to location from, 0% in Hong Kong to, 57.9% in New Delhi, India (p<0.001). Rates in Europe and North America were similar (range, 3.57%-8.94%). Overall, SARS-CoV-2 seroprevalence appears to be equal to or less than local populations (Table, 2). Seroprevalence rates were associated with IBD type (7.8% CD, 12.4% UC, 15% IBD-U, p<0.001), smoking status (p<0.001), and history of COVID diagnosis (p<0.001) or COVID hospitalization (p=0.001), and any IMM (p<0.001). (Table, 3). Whilst there were no significant differences in seroprevalence between patients receiving infliximab (IFX), vedolizumab (VDZ), and ustekinumab (UST), antibody levels were attenuated in patients on IFX monotherapy and combination therapy (both p=0.002) and VDZ (p=0.02), compared with no medications (Figure 1). Conclusion We confirm in diverse poulations that exposure to biologics or immunomodulators, type of disease, and smoking status are associated with seroprevalence and antibody levels. We show for the first time the dominant influence of geographical location on sero-status in these patients. These observations should be considered as we look towards post-vaccination data to help stratify patients for clinical guidelines on SARS-CoV-2 vaccination.
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Background: IBD patients on immune-modulatory therapies are considered high-risk for SARS-CoV-2 infection. Direct comparisons of serological responses to SARS-CoV-2 infection in IBD patients across different continents and medications are lacking. We performed SARSCoV- 2 sero-surveillance of IBD patients prior to vaccination at seven large tertiary centres in Asia, Europe, and North America. Methods: Clinical data and sera were collected from 2,241 IBD patients receiving routine care at institutions in Belgium, Canada, Hong Kong, India, Japan, United Kingdom, and the United States between May 2020 and September 2021 (Table 1). Sera were taken prior to vaccination. Clinical data were collected from patient questionnaires and medical records. Antibody reactivity to the SARS-CoV-2 spike protein was assessed using the Roche SARS-CoV-2 anti-spike total antibody and/or Siemens Healthineers COV2T anti-spike total antibody assays, which showed 99.4% concordance. We performed univariate analysis to evaluate association between variables and sero-status. Results: The pre-vaccination seroprevalence of antibodies to SARS-CoV-2 in IBD patient varied widely according to location from 0% in Hong Kong, China, to 57.9% in New Delhi, India. Rates in Europe and North America were similar (range 3.6%-8.9%). Overall, SARSCoV- 2 seroprevalence appears to be equal to or less than local populations (Table 1). Seroprevalence rates were associated with IBD type (Crohn's disease 7.8%, ulcerative colitis 12.4%, IBD-unclassified 15.0%, p<0.001), smoking status (p<0.001), and history of COVID diagnosis (p<0.001) or COVID hospitalization (p=0.001), and any immunomodulator (IMM) (p<0.001) (Table 1). Infection as indicated by seropositivity in the absence of known COVID infection occurred in 7.3% of patients. Whilst there were no significant differences in seroprevalence between patients receiving anti-tumor necrosis factor (anti-TNF) medications, vedolizumab (VDZ), and ustekinumab (UST), antibody levels were attenuated in patients on anti-TNF monotherapy (p=0.002), anti-TNF + IMM combination therapy (p=0.002), and VDZ (p=0.02), compared with no medications (Figure 1). Conclusion: We confirm in diverse populations that exposure to anti-TNFs, vedolizumab and immunomodulators, type of disease, and smoking status are associated with seroprevalence and antibody levels. We show for the first time the dominant influence of geographical location on sero-status in these patients. These observations should be considered as we look towards post-vaccination data to help stratify patients for clinical guidelines on SARS-CoV-2 vaccination. (Table Presented) Table 1. Seroprevalence of total anti-SARS-CoV-2 spike antibodies in IBD patients by ICARUS centre with non-IBD controls noted for New Delhi, India, and publicly reported local seroprevalence and by selected patient characteristics.(Figure Presented) Figure 1. Antibody levels by medication group.
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Introduction: Gut dysbiosis is associated with immune dysfunction and severity in COVID- 191-2. This study aimed to determine targeting dysbiosis as a therapy and its effect on antibody formation, gut dysbiosis and immune profile in patients with COVID-19. Material & Methods: In an open-label study, 25 consecutive hospitalized patients with COVID- 19 received a novel microbiome immunity formula (SIM01) for 28 days;30 patients who did not receive the intervention acted as controls. We collected fecal and blood samples at baseline and week 5 and followed subjects from admission up to five weeks. We performed multi-omics analysis using data from peripheral blood mononuclear cell (PBMC) transcriptome, fecal metagenomic sequencing and fecal metabolomic profiling (Figure 1A). Results: Significantly more COVID-19 patients on SIM01 developed anti-SARS-CoV-2 IgG than the control group at 2 weeks (Figure 1B). Patients on SIM01 (but not controls) showed a significant reduction of plasma levels of interleukin (IL)-6, macrophage colony-stimulating factor (M-CSF), tumour necrosis factor (TNF-a), IL-1RA (Figure 1C) and downregulated COVID-19 related signalling pathway in PBMC at Week 5. Fecal samples of subjects on SIM01 were enriched in commensal bacteria and reduced in opportunistic pathogens at week 4 and 5. Elevated plasma acetic acid in SIM01 group showed a negative correlation with SARS-CoV-2 viral load in nasopharyngeal samples (Figure 2A). Increased relative abundance of Bifidobacteria adolescentis and Coprococcus comes in fecal samples in SIM01 group positively correlated with plasma acetic acid levels (Figure 2B). Conclusion: We showed for the first time a novel microbiome formula SIM01 was effective in hastening antibody formation against SARS-CoV-2, reduced pro-inflammatory immune markers and restored gut dysbiosis in hospitalised COVID-19 patients. References: 1. Zuo T, Zhang F, Lui GCY, et al. Alterations in gut microbiota of patients with COVID-19 during time of hospitalization. Gastroenterology 2020;159:944-955 e8. 2. Yeoh YK, Zuo T, Lui GC, et al. Gut microbiota composition reflects disease severity and dysfunctional immune responses in patients with COVID- 19. Gut 2021;70:698-706. (Figure Presented) (Figure Presented)
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Background: Tofacitinib is an oral, small molecule JAK inhibitor for the treatment of UC. First market authorization was received in the US in May 2018. Post-marketing surveillance (PMS) is an important part of monitoring adverse events (AEs). Here, we report an analysis of PMS case safety reports for tofacitinib in patients with UC.Methods: We analyzed the worldwide tofacitinib PMS reports received in the Pfizer safety database from May 30, 2018 to August 25, 2020. The type and estimated reporting rate (RR) of serious AEs (SAEs) of interest, incl. infection, vascular, respiratory, neoplasm, and cardiac events, were reviewed. Patient-years of exposure (PY) was estimated based on worldwide sales data and the calculated daily regimens of tofacitinib 5 or 10 mg twice daily, immediate or extended-release formulations.Results: During the 27-month reporting period, worldwide post-marketing exposure to tofacitinib was 8,916 PY. Overall, 4,226 case reports were received and included 12,103 AEs, of which 1,839 were SAEs. Among the cases reported, 1,141 (27.0%) included an SAE and 18 (0.4%) were fatal. Of cases with reported gender (88.1%) or age (81.6%), 46.5%occurred in men and the median age was 45 years (range 9–93). When analyzed by tofacitinib formulation, proportions of SAE cases were similar (Table 1). Table 2 presents a summary of AEs and SAEs by MedDRA system organ class. Among the 1,839 SAEs, RRs per 100 PY were 3.28 for infection events, 1.26 for vascular events, 0.74 for respiratory events, 0.55 for neoplasm events, and 0.50 for cardiac events. The most commonly reported serious infection events (MedDRA preferred term [PT] n≥8) were 2 PTs within the high level term (HLT) of Clostridia infections (C. difficile colitis/infection), pneumonia, COVID-19, cytomegalovirus, and herpes zoster. The most commonly reported serious vascular events (n≥10) included hemorrhage, thrombosis, and deep vein thrombosis. Most serious respiratory events were pulmonary embolism. The most commonly reported serious neoplasm events (n≥3) were 2 PTs within the HLT of breast and nipple neoplasms malignant (breast cancer female/breast cancer), colon cancer, lymphoma, malignant melanoma, neoplasm malignant, and prostate cancer. The most commonly reported serious cardiac events (n≥4) were 3 PTs within the HLT of ischemic coronary artery disorders (acute myocardial infarction/myocardial infarction, angina pectoris) and pericarditis.Conclusion: Based on this review of PMS data for tofacitinib in UC, the types of AEs and RRs were consistent with the known tofacitinib safety profile, with no new potential risks identified. Limitations of PMS reports, low numbers of case reports for extended-release formulation, and reliance on estimated RRs due to lack of precise values for exposure, required for incidence rate calculation, should be considered when interpreting these results.(Table Presented)(Table Presented)
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Background: Cases of Coronavirus disease 2019 (COVID-19) have emerged in discrete waves across different regions in the world. We explored temporal trends in the reporting of COVID-19 in patients with inflammatory bowel disease (IBD), in a large global database. Methods: The Surveillance Epidemiology of Coronavirus Under Research Exclusion for Inflammatory Bowel Disease (SECURE-IBD) is an international registry to study the character-istics and outcomes of patients with IBD diagnosed with COVID-19. Joinpoint regression models calculated the average percent change (APC) with 95% confidence intervals (CI) in weekly reported cases of COVID-19 in patients in the registry stratified by geographic regions (Asia, Europe, Latin America, and North America) during two time periods: March 22 to September 12 and September 13 to November 14, 2020. We also determined the APC in US regions (Midwest, Northeast, South and West) during the two time periods. Results: Across 63 countries and dependencies, 3,195 cases of COVID-19 in people with IBD were reported over an 8-month period. Overall, COVID-19 reporting steadily decreased throughout the world by 4.5% per week (95% CI: −5.7, −3.2) from March 22 to September 12, 2020 but then steadily climbed by 12.4% per week (95% CI: 6.8, 18.3) from September 13 to November 14, 2020. After stratification by geographic region, weekly reporting declined before September 13 in North America (APC = −2.0%;95% CI: −3.7, −0.4), Asia (APC =− 4.4%;95% CI: −7.8, −0.9), and Europe (APC = −8.6%;95% CI: −10.6, −6.6), but escalated in Latin America (APC = 3.4%;95% CI: 0.7, 6.1) (Figure 1). After September 12, the rate of weekly cases decreased in Latin America (APC = −19.0%;95% CI: −33.3, −1.7) and Asia (APC = −19.3%;95% CI: −34.6, −0.5), while increased in North America (APC = 10.7%;95% CI: 4.3, 17.4) and Europe (APC = 28.0%;95% CI: 17.3, 39.6) (Figure 1). Within the US, temporal trends differed by region: Midwest (stable APC: −0.8%;95% CI: −3.5, 1.9 then increase APC: 27.3%;95%: 16.1, 39.6), Northeast (decrease APC: −9.1%;95% CI:− 11.8, −6.2 then stable APC: 2.4%;95% CI: −9.9, 16.5), South (increase APC: 5.3%;95%CI: 2.5, 8.3 then decrease APC: −12.0;95% CI: −18.4, −5.0), and West (stable APC: 0.2%;95% CI: −3.0, 3.5 then stable APC: 9.0%;95% CI: −13.8, 37.9) (Figure 2). Conclusion: COVID-19 reporting to SECURE-IBD declined steadily during the first wave of the pandemic throughout the world except Latin America. Starting in September, reports to SECURE-IBD rose in both Europe and North America, consistent with the second wave of the pandemic in these countries.(Figure presented)Figure 1. Global regional temporal trends in reporting of COVID-19 in patients with IBD from the SECURE-IBD registry: A. Asia, B. Europe, C. Latin America, and D. North America: March 22–28 to September 6-12 and September 13-19 to November 8–14, 2020(Figure presented)Figure 2. United States regional temporal trends in reporting of COVID-19 in patients with IBD from the SECURE-IBD registry: A. Midwest, B. Northeast, C. South, and D. West: March 22–28 to September 6-12 and September 13-19 to November 8–14, 2020
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Introduction In the United States (US), race and ethnicity impact outcomes of chronic diseases including inflammatory bowel disease (IBD). The aim of this study was to evaluate racial and ethnic disparities in the coronavirus disease 2019 (COVID-19) outcomes among IBD patients and to assess the degree to which observed disparities may be attributed to non-IBD comorbidities. Methods Using data from the Surveillance of Coronavirus Under Research Exclusion for Inflammatory Bowel Disease (SECURE-IBD), an international, collaborative registry of IBD patients with confirmed COVID-19, we used multivariable logistic regression to evaluate associations between race and ethnicity and COVID-19 outcomes. These included hospitalization and severe COVID-19 defined as a composite of intensive care unit stay, mechanical ventilation and/or death. Results We analyzed 988 US cases (96 [9.7%] Hispanic;141 [14.3%] non-Hispanic Black;680 [68.8%] non-Hispanic White). Bivariate analyses of outcomes are reported in the Table. Compared to non-Hispanic White patients, Hispanic patients had higher odds of hospitalization [adjusted odds ratio (aOR) 2.01, 95% CI 1.07 to 3.79] but not severe COVID-19 (2.75, 95% CI 0.93 to 8.10). Compared to non-Hispanic White patients, non-Hispanic Black patients had higher odds of hospitalizations (aOR 2.47, 95% CI 1.48 to 4.11) and severe COVID-19 (2.50, 95% CI 1.01 to 6.20) after adjusting for age, sex, and IBD activity (Figure). Upon adjusting for comorbidities, the odds of hospitalization and severe COVID-19 remained unchanged in Hispanic individuals compared to non-White Hispanic individuals (aOR 2.14, 95% CI 1.09 to 4.18 for hospitalizations and 2.69, 95% CI 0.77 to 9.38 for severe COVID-19), but decreased in Black individuals compared to non-White Hispanic individuals (aOR 2.21, 95% CI 1.30 to 3.76 for hospitalization and 2.13, 95% CI 0.81 to 5.59 for severe COVID-19). Conclusions The odds of adverse COVID-19 outcomes are higher in Hispanic and non-Hispanic Black, compared with non-Hispanic White individuals with IBD, accounted for partially by underlying comorbidities. (Table presented) COVID-19 Outcomes for United States cases reported to SECURE-IBD, overall and stratified by race/ethnicity (Figure presented) Odds ratios of A) hospitalization due to COVID-19 and B) severe COVID-19 outcomes (ICU stay, mechanical ventilation or death) among Hispanic vs. non-Hispanic White individuals and among non-Hispanic Black vs. non-Hispanic White individuals
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Introduction: Growing evidence indicates that gut microbiota plays an important role in COVID-191-5. We previously reported that patients with COVID-19 had altered faecal microbiomes characterised by enrichment of opportunistic pathogens and depletion of beneficial commensals1,2. Our results showed that gut dysbiosis correlated with the severity of COVID- 19 and persisted even after clearance of SARS-CoV-2 in respiratory samples and resolution of respiratory symptoms1,2. Although probiotics has been advocated in the management of COVID-196, whether targeting dysbiosis will improve outcomes of COVID-19 is largely unknown. Aims & Methods: The aim was to assess the effects of a novel microbiome formula (SIM01) as an adjuvant therapy on immunological responses and changes in gut microbiota of hospitalised COVID-19 patients. Methods: This was an open-label, proof-of-concept study. Consecutive COVID-19 patients admitted to an infectious disease referral centre in Hong Kong were given a novel formula of Bifidobacteria strains, galactooligosaccharides, xylooligosaccharide, and resistant dextrin (SIM01). The latter was derived from metagenomic databases of COVID-19 patients and healthy population. COVID-19 patients who were admitted under another independent infectious disease team during the similar period without receiving the SIM01 formula acted as controls. All patients received standard treatments for COVID-19 according to the hospital protocol. We assessed antibody response, proinflammatory markers and faecal microbiota profile from admission up to Week 5. Results: Twenty-five consecutive patients received SIM01 for 28 days;30 patients without receiving the formula acted as controls. Significantly more patients receiving SIM01 than the control group developed antibody (88% vs. 63.3%;p =0.037) by Day 16. One (4%) patient in the SIM01 group and 8 (26.7%) in the control group did not develop positive IgG antibody upon discharge. At Week 5, plasma levels of interleukin (IL)-6, monocyte chemoattractant protein-1 (MCP-1), macrophage colony-stimulating factor (M-CSF), tumour necrosis factor (TNF-α), and IL-1RA dropped significantly in the SIM01 group but not in the control group. Metagenomic analysis showed that the bacterial species of the SIM01 formula were found in greater abundance, leading to enrichment of commensal bacteria and suppression of opportunistic pathogens in COVID-19 patients by Week 4 and Week 5. Conclusion: The use of a novel microbiome formula SIM01 hastened antibody formation against SARS-CoV-2, reduced pro-inflammatory immune markers and restored gut dysbiosis in hospitalised COVID-19 patients.
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Background Evidence regarding the use of proton-pump inhibitors (PPIs) in COVID-19 patients remains elusive. We examined the impact of PPI use on clinical outcomes of COVID-19 patients in a territory-wide cohort. Methods We performed a retrospective cohort study using data from an electronic healthcare database managed by the Hospital Authority, Hong Kong. COVID-19 patients diagnosed virologically between 23 January 2020 and 1 January 2021 in Hong Kong were identified. The primary endpoint was a composite of intensive care unit admission, use of invasive mechanical ventilation, and/or death. PPI user was identified by PPI use within 12 months before the diagnosis of COVID-19. In subgroup analysis, current PPI users were defined as patients who used PPIs within 1 month before the diagnosis of COVID-19;past PPI users were defined as patients who used PPIs 1 to 12 months before COVID-19 diagnosis. We performed sensitivity analysis after excluding patients with short-term new NSAID use within 1 month before COVID-19 diagnosis to minimize reverse causation bias. Results We identified 8,675 COVID-19 patients (mean age 46 years, 49% male, 97.6% of all the reported cases in Hong Kong);579 (6.7%) patients had used PPI. PPI users were older, more likely to have comorbidities, concomitant medications and unfavorable laboratory parameters than non-users. Of 8,675 COVID-19 patients, 500 (5.8%) developed the primary endpoint. After propensity score (PS) balancing for patients' demographics, comorbidities, laboratory parameters, and use of medications, PPI use was not associated with the development of primary endpoint in PS weighting (weighted hazard ratio [HR] 1.11, 95% confidence interval [CI] 0.83-1.47, P=0.482) (IDDF2021-ABS- 0122 Figure 1. Cumulative incidence of primary endpoint (a composite endpoint of intensive care unit [ICU] admission, use of invasive mechanical ventilation [IMV], and death) in COVID-19 patients who were and were not proton- pump inhibitor (PPI) users after propensity score (PS) weighting in a single multiple imputation data set.), and PS matching analysis (weighted HR 0.81, 95%CI 0.57-1.14, P=0.228) (IDDF2021-ABS-0122 Figure 2. Cumulative incidence of primary endpoint (a composite endpoint of intensive care unit [ICU] admission, use of invasive mechanical ventilation [IMV], and death) in COVID-19 patients who were and were not proton-pump inhibitor (PPI) users after propensity score (PS) matching in a single multiple imputation data set). Consistent non-association was observed after multivariable adjustment (adjusted HR 0.84, 95%CI 0.66- 1.07, P=0.151), in subgroups of current and past PPI users, and in sensitivity analysis after excluding short-term new NSAID users. Conclusions PPI use is not associated with adverse clinical outcomes in COVID-19 patients. The result remains robust after PS weighting, PS matching, multivariable adjustment, and subgroup analyses.