SARS-CoV-2 seroprevalence in patients with autoimmune rheumatic diseases versus family controls: a multi-city cross-sectional survey.

There is uncertainty regarding the effect of the SARS-CoV-2 infection on patients with autoimmune rheumatic diseases (AIRD) who are on immunosuppressive drugs. We did a multicity cross-sectional seroprevalence study conducted in five different cities in India before COVID-19 immunization. Patients with a diagnosis of AIRD and DMARDs were included. Relatives of the patients, preferably staying in the same household with no known rheumatic diseases served as controls. Serum IgG antibodies to SARS-CoV-2 Receptor Binding Domain (RBD) of the spike protein and nucleoprotein (NP) were assayed in eight hundred and eighty nine sera (subjects with disease = 379 and in subjects without disease = 510). IgG antibodies to either RBD and/or NP were positive in 135 (36%) subjects with AIRD as compared to 196 (38%) controls. The seroprevalence of anti-RBD and anti-NP varied between different cities but was not significantly different between subjects with and without disease in Mumbai, Ahmedabad, Bengaluru and Bhubaneswar. However, the occurrence of IgG antibodies to RBD was significantly (p < 0.05) lower in subjects with disease (28/65;43%) as compared to subjects without disease (42/65;65%) in Kolkata, where the positivity rate was lower in connective tissue disease group than in inflammatory arthritis group. Overall, patients with rheumatic diseases on DMARDs have IgG antibodies to RBD and NP of SARSCoV-2 at a comparable level with that of subjects without disease, but the level of antibodies to RBD is lower in patients with connective tissue disease on immunosuppressive drugs in one centre.

Clinical and Microbiological Profile of Patients with Acute Cholangitis in a Tertiary Care Center.

INTRODUCTION: Acute cholangitis usually complicates biliary obstruction and antibiotic therapy plays a major role, as an adjunct to adequate biliary drainage in cholangitis. The knowledge of bacterial epidemiology in cholangitis will help to choose antibiotic wisely. The aim of the study was to analyze the clinical and bacteriological profile, in acute cholangitis. MATERIALS: We retrospectively analyzed the patients with acute cholangitis admitted under the Department of Gastroenterology, Kalinga Institute of Medical Sciences, Bhubaneswar August 2020 and July 2022. RESULT: 100 patients with mean age of 53.79 ± 14.96 years (male:female = 48:52) were included in the study. Choledocholithiasis (54%), carcinoma gallbladder (16%) and periampullary carcinoma (13%) were the main cause of biliary obstruction. The most common presenting complaints were fever followed by jaundice, the classically described Charcot's triad was present in only 33 (33%) patients. Most of the patients had moderate cholangitis (52%), followed by mild cholangitis (27%) and severe cholangitis (21%); based on Tokyo 2018 guidelines. Biliary drainage was done by endoscopic retrograde stenting in 92% and percutaneous trans-hepatic drainage in 8% of patients. Bile culture were positive on 86% of patients; gram-negative isolates were in 82.5% (71/86), gram-positive isolates were in 15.2% (13/86) and candida species in 2.3% (2/86). The commonest gram negative organisms isolated were Escherichia coli (34/86) followed by Klebsiella pneumonia (26/86) and Enterococcus faecalis (6/86) being the commonest gram-positive organism. The overall mortality rate was 11%; all had severe cholangitis. CONCLUSION: Choledocholithiasis is the commonest cause of biliary obstruction in patients presenting with acute cholangitis. Escherichia coli and Klebsiella pneumonia are the major contributors to acute cholangitis. References Reiter FP, Obermeier W, Jung J, et al. Prevalence, resistance rates, and risk factors of pathogens in routine bile cultures obtained during endoscopic retrograde cholangiography. Dig Dis 2021;39(1):42-51. Kaya M, Bestas R, Bacalan F, et al. Microbial profile and antibiotic sensitivity pattern in bile cultures from endoscopic retrograde cholangiography patients. World J Gastroenterol 2012;18(27):3585-3589.

Redefining Lobe-Wise Ground-Glass Opacity in COVID-19 Through Deep Learning and its Correlation With Biochemical Parameters.

During COVID-19 pandemic qRT-PCR, CT scans and biochemical parameters were studied to understand the patients' physiological changes and disease progression. There is a lack of clear understanding of the correlation of lung inflammation with biochemical parameters available. Among the 1136 patients studied, C-reactive-protein (CRP) is the most critical parameter for classifying symptomatic and asymptomatic groups. Elevated CRP is corroborated with increased D-dimer, Gamma-glutamyl-transferase (GGT), and urea levels in COVID-19 patients. To overcome the limitations of manual chest CT scoring system, we segmented the lungs and detected ground-glass-opacity (GGO) in specific lobes from 2D CT images by 2D U-Net-based deep learning (DL) approach. Our method shows accuracy, compared to the manual method (  âˆ¼ 80%), which is subjected to the radiologist's experience. We determined a positive correlation of GGO in the right upper-middle (0.34) and lower (0.26) lobe with D-dimer. However, a modest correlation was observed with CRP, ferritin and other studied parameters. The final Dice Coefficient (or the F1 score) and Intersection-Over-Union for testing accuracy are 95.44% and 91.95%, respectively. This study can help reduce the burden and manual bias besides increasing the accuracy of GGO scoring. Further study on geographically diverse large populations may help to understand the association of the biochemical parameters and pattern of GGO in lung lobes with different SARS-CoV-2 Variants of Concern's disease pathogenesis in these populations.

Insights into Plasmodium and SARS-CoV-2 co-infection driven neurological manifestations.

In malaria-endemic regions, people often get exposed to various pathogens simultaneously, generating co-infection scenarios. In such scenarios, overlapping symptoms pose serious diagnostic challenges. The delayed diagnosis may lead to an increase in disease severity and catastrophic events. Recent coronavirus disease 2019 (COVID-19) pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has affected various areas globally, including malaria-endemic regions. The Plasmodium and SARS-CoV-2 co-infection and its effect on health are yet unexplored. We present a case report of a previously healthy, middle-aged individual from the malaria-endemic area who suffered SARS-CoV-2 and Plasmodium falciparum co-infection. The patient developed severe disease indications in a short time period. The patient showed neurological symptoms, altered hematological as well as liver-test parameters, and subsequent death in a narrow time span. We hereby discuss the various aspects of this case regarding treatment and hematological parameters. Further, we have put forward perspectives related to the mechanism behind severity and neurological symptoms in this fatal parasite-virus co-infection case. In malaria-endemic regions, due to overlapping symptoms, suspected COVID-19 patients should also be monitored for diagnosis of malaria without any delay. The SARS-CoV-2 and Plasmodium co-infection could increase the disease severity in a short time span. In treatment, dexamethasone may not help in severe cases having malaria as well as COVID-19 positive status and needs further exploration.