Oral microbial taxa associated with risk for SARS-CoV-2 infection.

Hypothesis and objective: The oral and digestive tract microbial ecosystem has sparked interest because of its impact on various systemic diseases and conditions. The oral cavity serves not only as a reservoir for many potentially virulent microbiota but also as an important entry point and portal to the human body system. This is especially significant in the transmissibility of the virulent current pandemic virus SARS-CoV-2. The oral and digestive microbiome influences the inflammatory burden and effectiveness of the immune system and serves as a marker of activity of these host processes. The host immune response plays a role in infection susceptibility, including SARS-CoV-2. The purpose of this study is to investigate the role of specific salivary oral microbiome in susceptibility to SARS-CoV-2 infection. Methods and results: One hundred six subjects of known medical and dental history who consented to provide saliva samples between January 2017 and December 2019 were included in this study. Sixteen had become COVID-19 positive based on the PCR test by 3/01/2021. A comparison of oral microbiome bacteria taxa profiles based on 16S rRNA sequencing revealed differences between the two groups in this pilot study. Conclusions: These bacteria taxa may be markers of increased susceptibility to SARS-CoV-2 infection in the unvaccinated population.

Decentralised point-of-care testing for acute, chronic and infectious disease - benefits and challenges

The COVID-19 pandemic has reinforced Australia's need for diagnostic testing frameworks that are well-prepared, well-resourced, responsive, appropriately governed, scalable, interdisciplinary and collaborative.1 Point-of-care (POC) technologies offer diagnostic solutions capable of delivering individual, community and public health benefits in settings where: a) laboratory testing is not available, b) rapid turn-around time is needed, c) high loss to follow-up occurs in high-risk populations with standard of care cascades and/or d) disease transmission rates exceed laboratory response capacity. Key translational research derived from collaborative point-of-care testing networks for a) diabetes management (238 remote health services;3,233 operators;172,069 HbA1c and 51,379 urine albumin:creatinine ratio tests), b) acute care (106 remote health services;2,279 operators;32,950 blood gas, 32,689 cardiac troponin, 46,418 urea/electrolytes, 48,193 international normalised ratio tests), c) hepatitis C virus (HCV) (41 sites;110 operators;5,733 HCV tests;4,978 RNA, 755 antibody), d) syphilis screening (156 sites;1,412 operators), e) chlamydia, gonorrhea or trichomonas (51 sites;795 operators;>50,000 tests) or f) COVID-19 (101 remote health services, 733 operators, 72,624 tests) will be used to highlight operational, clinical, public health, and economic benefits of POC testing. Challenges associated with scale-up and accreditation pathways for decentralised POC testing will be discussed. Reference 1. Revised Testing Framework for COVID-19 in Australia, March 2022 Version 2.1. Communicable Disease Network Australia and Public Health Laboratory Network. Copyright © 2022

Oral microbial taxa associated with risk for SARS-CoV-2 infection

Hypothesis and objective The oral and digestive tract microbial ecosystem has sparked interest because of its impact on various systemic diseases and conditions. The oral cavity serves not only as a reservoir for many potentially virulent microbiota but also as an important entry point and portal to the human body system. This is especially significant in the transmissibility of the virulent current pandemic virus SARS-CoV-2. The oral and digestive microbiome influences the inflammatory burden and effectiveness of the immune system and serves as a marker of activity of these host processes. The host immune response plays a role in infection susceptibility, including SARS-CoV-2. The purpose of this study is to investigate the role of specific salivary oral microbiome in susceptibility to SARS-CoV-2 infection. Methods and results One hundred six subjects of known medical and dental history who consented to provide saliva samples between January 2017 and December 2019 were included in this study. Sixteen had become COVID-19 positive based on the PCR test by 3/01/2021. A comparison of oral microbiome bacteria taxa profiles based on 16S rRNA sequencing revealed differences between the two groups in this pilot study. Conclusions These bacteria taxa may be markers of increased susceptibility to SARS-CoV-2 infection in the unvaccinated population.

Small bowel obstruction caused by a fibrotic bow-string appendix: a consequence of non-operative management of acute appendicitis.

A 73-year-old woman presented with small bowel obstruction that failed to settle with conservative management. Over the previous 2 years she had presented twice with computed tomography scan-proven acute appendicitis with localised perforation of the appendix tip. In view of medical comorbidities, she was treated non-operatively with clinical and radiological resolution on each occasion, but on the third presentation laparoscopy was undertaken for non-resolving small bowel obstruction and the non-inflamed appendix itself was identified as a fibrous band causing compression of the distal ileum and complete small bowel obstruction. Following division and appendicectomy, the patient made an uneventful recovery. This case illustrates the potential consequence of repeated appendiceal inflammation and non-operative management and may be seen increasingly as this approach is widely adopted during the COVID-19 pandemic.

Development of a Robust Manufacturing Route for Molnupiravir, an Antiviral for the Treatment of COVID-19

Herein is described the development of a large-scale manufacturing process for molnupiravir, an orally dosed antiviral that was recently demonstrated to be efficacious for the treatment of patients with COVID-19. The yield, robustness, and efficiency of each of the five steps were improved, ultimately culminating in a 1.6-fold improvement in overall yield and a dramatic increase in the overall throughput compared to the baseline process.