Antifungal, Cytotoxic, and Immunomodulatory Properties of Tea Tree Oil and Its Derivative Components: Potential Role in Management of Oral Candidosis in Cancer Patients

Candida albicans forms oral biofilms that cause disease and are difficult to treat with conventional antifungal agents. Tea tree oil (TTO) is a natural compound with reported antimicrobial and immunomodulatory activities. The aims of the study were to evaluate the antifungal efficacy of TTO and key derivatives against C. albicans biofilms, to assess the toxicological effects of TTO on a clinically relevant oral cell line, and to investigate its impact on inflammation. TTO and its derivatives were examined against 100 clinical strains of C. albicans. Planktonic minimum inhibitory concentrations (MICs) were determined using the CLSI M-27A broth microdilution method. Sessile MICs were determined using an XTT reduction assay. Inhibition, time-kill, and mode of action studies were performed. OKF6-TERT2 epithelial cells were used for cytotoxicity and cytokine expression assays. Planktonic C. albicans isolates were susceptible to TTO, terpinen-4-ol (T-4-ol), and α-terpineol, with an MIC50 of 0.5, 0.25, and 0.25%, respectively. These three compounds also displayed potent activity against the 69 biofilm-forming strains, of which T-4-ol and α-terpineol displayed rapid kill kinetics. For all three compounds, 1 × MIC50 effectively inhibited biofilm growth when C. albicans were treated at 0, 1, and 2 h post adhesion. By scanning electron microscopy analysis and PI uptake, TTO and derivative components were shown to be cell membrane active. TTO and T-4-ol were cytotoxic at 1 × MIC50, whereas at 0.5 × MIC50 T-4-ol displayed no significant toxicity. Transcript and protein analysis showed a reduction of IL-8 when treated with TTO and T-4-ol. These data provide further in vitro evidence that TTO and its derivative components, specifically T-4-ol, exhibit strong antimicrobial properties against fungal biofilms. T-4-ol has safety advantages over the complete essential oil and may be suitable for prophylaxis and treatment of established oropharyngeal candidosis. A clinical trial of T-4-ol is worthy of consideration

The Question of Recovery: An Introduction

This special issue of Social Text takes as its starting point the generative tension between recovery as an imperative that is fundamental to historical writing and research, and the impossibility of recovery when engaged with archives whose very assembly and organization occlude certain historical subjects. Responding to recent debates among scholars of Atlantic slavery and freedom, it approaches archival silences and secrets not simply as antagonistic to our desire to recover but also as a beginning. The articles gathered in this issue thus foreground methodological experimentation at the boundary of archival impossibility. They develop new approaches--to archival geographies, designs, reading practices, and affect--that illuminate forms of black politics beyond narratives of radical redemption or liberal inclusion

Introduction: Food and Sovereignty

This special issue had its origins in the spring and summer of 2020, a moment in which the stakes of food, gender and sovereignty were particularly visible. Pandemic-related shortages, shutdowns of restaurants, marketplaces and stores and sudden food insecurity for millions of people – all inescapably changed the daily experience of eating and provisioning. To get by, people created new networks to bypass the systems they had counted on in the past, sometimes retreating into their own DIY systems for producing food (e.g., home baking) and sometimes rediscovering local food systems. Food work was one significant source of the increased inequities of care and carework as lockdown made the tasks of cooking, provisioning and feeding that are traditionally considered ‘women's work’ more important, more visible in people's homes and more difficult. For many, these inequities, including barriers to food and precarity of supplies, were not new; they had been facts of life for a long time. In other, often wealthier, communities, the pandemic revealed and accelerated the impossibility of the status quo. It demanded new ways of thinking about food, gender and who has the right to exert authority over them

Improving participation and engagement with a COVID-19 surveillance programme in an outpatient setting

BACKGROUND: On 3 August 2020, Public Health Scotland commenced a prospective surveillance study to monitor the prevalence of COVID-19 among asymptomatic outpatients attending dental clinics across 14 health boards in Scotland. OBJECTIVES: The primary aim of this quality improvement project was to increase the number of COVID-19 tests carried out in one of the participating sites, Glasgow Dental Hospital and School. The secondary aim was to identify barriers to patient participation and staff engagement when implementing a public health initiative in an outpatient setting. METHOD: A quality improvement working group met weekly to discuss hospital findings, identify drivers and change ideas. Details on reasons for patient non-participation were recorded and questionnaires on project barriers were distributed to staff. In response to findings, rapid interventions were implemented to fast-track increases in the numbers of tests being carried out. RESULTS: Over 16 weeks, 972 tests were carried out by Glasgow Dental Hospital and School Secondary Care Services. The number of tests per week increased from 19 (week 1) to 129 (week 16). This compares to a similar ‘control’ site, where the number of tests carried out remained unchanged; 38 (week 1) to 36 (week 16). The most frequent reason given for non-participation was fear that the swab would hurt. For staff, lack of time and forgetting to ask patients were identified as the most significant barriers. CONCLUSION: Public health surveillance programmes can be integrated rapidly into outpatient settings. This project has shown that a quality improvement approach can be successful in integrating such programmes. The key interventions used were staff engagement initiatives and front-line data collection. Implementation barriers were also identified using staff questionnaires

Diagnosis of genetic diseases in seriously ill children by rapid whole-genome sequencing and automated phenotyping and interpretation.

By informing timely targeted treatments, rapid whole-genome sequencing can improve the outcomes of seriously ill children with genetic diseases, particularly infants in neonatal and pediatric intensive care units (ICUs). The need for highly qualified professionals to decipher results, however, precludes widespread implementation. We describe a platform for population-scale, provisional diagnosis of genetic diseases with automated phenotyping and interpretation. Genome sequencing was expedited by bead-based genome library preparation directly from blood samples and sequencing of paired 100-nt reads in 15.5 hours. Clinical natural language processing (CNLP) automatically extracted childrens deep phenomes from electronic health records with 80% precision and 93% recall. In 101 children with 105 genetic diseases, a mean of 4.3 CNLP-extracted phenotypic features matched the expected phenotypic features of those diseases, compared with a match of 0.9 phenotypic features used in manual interpretation. We automated provisional diagnosis by combining the ranking of the similarity of a patients CNLP phenome with respect to the expected phenotypic features of all genetic diseases, together with the ranking of the pathogenicity of all of the patients genomic variants. Automated, retrospective diagnoses concurred well with expert manual interpretation (97% recall and 99% precision in 95 children with 97 genetic diseases). Prospectively, our platform correctly diagnosed three of seven seriously ill ICU infants (100% precision and recall) with a mean time saving of 22:19 hours. In each case, the diagnosis affected treatment. Genome sequencing with automated phenotyping and interpretation in a median of 20:10 hours may increase adoption in ICUs and, thereby, timely implementation of precise treatments

The revised Approved Instructional Resources score:An improved quality evaluation tool for online educational resources

BACKGROUND: Free Open-Access Medical education (FOAM) use among residents continues to rise. However, it often lacks quality assurance processes and residents receive little guidance on quality assessment. The Academic Life in Emergency Medicine Approved Instructional Resources tool (AAT) was created for FOAM appraisal by and for expert educators and has demonstrated validity in this context. It has yet to be evaluated in other populations.OBJECTIVES: We assessed the AAT's usability in a diverse population of practicing emergency medicine (EM) physicians, residents, and medical students; solicited feedback; and developed a revised tool.METHODS: As part of the Medical Education Translational Resources: Impact and Quality (METRIQ) study, we recruited medical students, EM residents, and EM attendings to evaluate five FOAM posts with the AAT and provide quantitative and qualitative feedback via an online survey. Two independent analysts performed a qualitative thematic analysis with discrepancies resolved through discussion and negotiated consensus. This analysis informed development of an initial revised AAT, which was then further refined after pilot testing among the author group. The final tool was reassessed for reliability.RESULTS: Of 330 recruited international participants, 309 completed all ratings. The Best Evidence in Emergency Medicine (BEEM) score was the component most frequently reported as difficult to use. Several themes emerged from the qualitative analysis: for ease of use-understandable, logically structured, concise, and aligned with educational value. Limitations include deviation from questionnaire best practices, validity concerns, and challenges assessing evidence-based medicine. Themes supporting its use include evaluative utility and usability. The author group pilot tested the initial revised AAT, revealing a total score average measure intraclass correlation coefficient (ICC) of moderate reliability (ICC = 0.68, 95% confidence interval [CI] = 0 to 0.962). The final AAT's average measure ICC was 0.88 (95% CI = 0.77 to 0.95).CONCLUSIONS: We developed the final revised AAT from usability feedback. The new score has significantly increased usability, but will need to be reassessed for reliability in a broad population.</p

The Social Media Index as an Indicator of Quality for Emergency Medicine Blogs: A METRIQ Study

Study objective: Online educational resources such as blogs are increasingly used for education by emergency medicine clinicians. The Social Media Index was developed to quantify their relative impact. The Medical Education Translational Resources: Indicators of Quality (METRIQ) study was conducted in part to determine the association between the Social Media Index score and quality as measured by gestalt and previously derived quality instruments. Methods: Ten blogs were randomly selected from a list of emergency medicine and critical care Web sites. The 2 most recent clinically oriented blog posts published on these blogs were evaluated with gestalt, the Academic Life in Emergency Medicine Approved Instructional Resources (ALiEM AIR) score, and the METRIQ-8 score. Volunteer raters (including medical students, emergency medicine residents, and emergency medicine attending physicians) were identified with a multimodal recruitment methodology. The Social Media Index was calculated in February 2016, November 2016, April 2017, and December 2017. Pearson's correlations were calculated between the Social Media Index and the average rater gestalt, ALiEM AIR score, and METRIQ-8 score. Results: A total of 309 of 330 raters completed all ratings (93.6%). The Social Media Index correlated moderately to strongly with the mean rater gestalt ratings (range 0.69 to 0.76) and moderately with the mean rater ALiEM AIR score (range 0.55 to 0.61) and METRIQ-8 score (range 0.53 to 0.57) during the month of the blog post's selection and for 2 years after. Conclusion: The Social Media Index's correlation with multiple quality evaluation instruments over time supports the hypothesis that it is associated with overall Web site quality. It can play a role in guiding individuals to high-quality resources that can be reviewed with critical appraisal techniques