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<i>Toxoplasma gondii</i> seropositivity among patients with sickle cell disease: Prevalence and association with blood transfusion history

by Verner N. Orish, Renosten E. Tetteh, David Adzah, Chinecherem A. Ndiokwelu, Emmanuel A. Allotey, Evans A. Yeboah, Sylvester Y. Lokpo, Kenneth Ablordey, Duneeh R. Vikpebah, Ekene K. Nwaefuna, Precious K. Kwadzokpui, Noble D. Dika, Elom Y. Dzefi, Kokou H. Amegan-Aho, Aninagyei Enoch, Senyo Tagboto

Background

Toxoplasma gondii (T. gondii) is a successful protozoan parasite infecting up to a third of the human population. It has varied transmission routes including ingestion of food and water contaminated by cat feces containing oocysts of the parasite and ingestion of bradyzoites in poorly cooked meat. Blood transfusion is another possible route of transmission especially among people with medical conditions requiring blood transfusion, such as those with sickle cell disease (SCD). This study aimed at finding out the prevalence of T. gondii infection and the association of blood transfusion among patients with SCD.

Method

This study was a cross-sectional study involving SCD patients attending the SCD clinic at the Ho Teaching Hospital in the Volta Region of Ghana. Questionnaire administration was employed to obtain sociodemographic information, cat ownership, consumption of poorly cooked meat, as well as blood transfusion history. A blood sample was collected and anti-T. gondii IgG and IgM were detected using Rapid Diagnostic Test (RDT), while Enzyme-linked Immunosorbent Assay (ELISA) was used as the gold standard and reference. Seropositivity was defined as either positive for IgG, IgM or both. Data was analyzed using SPSS version 23, with frequency distribution done for the sociodemographic variables and the prevalence of RDT and ELISA anti-T. gondii IgG and IgM. Pearson Chi-square analysis was performed to find any significant association between diagnosis of T. gondii infection with sociodemographic variables and blood transfusion. Logistic regression analysis was performed to investigate the odds of seropositivity (ELISA) with sociodemographic variables and blood transfusion.

Results

A total of 156 SCD patients participated in this study of which 124 (79.5%) and 32(20.5%) were HbSS and HbSC respectively. Among the study participants, 105 (67.3%) had a history of blood transfusion. A total of 60 (38.5%) and 83 (53.2%) patients were positive for RDT and ELISA respectively. No significant association was seen between T. gondii diagnosis and cat ownership (RDT,20[37.7%], p = 0.891; ELISA, 27[50.9%], p = 0.673) and consumption of poorly cooked meat (RDT,37[41.6%],p = 0.370;ELISA,53[59.6%], p = 0.211). However there was a significant association between T. gondii diagnosis and age, with seropositive results predominantly seen among older patients (≥20 years) (RDT, 38[52.1%], p = 0.002; ELISA 49 [67.1%, p = 0.002]. Blood transfusion had a significant association with T.gondii diagnosis (RDT, p = 0.003; ELISA, p = 0.001). A total of 66 (62.9%) of SCD patients who had history of blood transfusion tested positive for ELISA and they had 3 times the odds of testing positive for ELISA (adjusted OR 3.14[95% CI 1.50–6.58]; p = 0.002).

Conclusion

The prevalence of T. gondii infection was higher by ELISA (53.0%) than by rapid diagnostic testing (RDT) (38.5%), and sickle cell disease patients with a transfusion history had higher odds of seropositivity. These findings highlight the need to strengthen transfusion safety protocols and consider screening strategies for T. gondii among high-risk populations such as patients with sickle cell disease. Also, there is the need for longitudinal research to help elucidate the true contribution of blood transfusion transmission of T. gondii since a cross-sectional study, causality could not be established.

Multicancer early detection in a cohort of patients with confirmed and suspected cancer by measuring plasma amino acid cross sections with the Enlighten test: MODERNISED protocol

Por: Wilding · S. · Goss · V. · Sukdao · W. · Hamady · Z. · Lord · J. · Coleman · A. · Pointer · C. · Walters · J. · Herbert · W. · Mclaughlin · K. · Waugh · R. · Irvine · N. · Oliver · T. · Soulsby · I. · Hooper · J. · Crabb · S. J. · Griffiths · G. · Yates · E. · Davies · A.
Introduction

Detecting cancer earlier improves treatment options and long-term survival. A multicancer early detection test that reliably picks up early-stage cancer would potentially save lives and reduce the cost of treating cancer. One promising candidate is the Enlighten test, which applies machine learning to plasma amino acid concentrations to detect cancer. In a cohort of 77 patients recently diagnosed with breast, colorectal, pancreatic or prostate cancer, 60 (78%) were detected by the test (sensitivity), with no false positives in 20 healthy controls. The MODERNISED study will further develop the Enlighten test to detect 10 different cancers by adding bladder, lung, melanoma, oesophageal, ovarian and renal cancer to the test.

Methods and analysis

MODERNISED (ISRCTN17299125) is a multicentre prospective, non-interventional, case–control study. We aim to recruit 1000 adult participants with a recent cancer diagnosis, 250 adult participants with symptoms of cancer where a cancer diagnosis was ruled out by the National Health Service (NHS) standard of care and 100 healthy adult volunteers. Cancer tissue of origin (ToO) will include bladder, breast, colorectal, lung, melanoma, oesophageal, ovarian, pancreatic, prostate and renal. Participants in the two non-cancer cohorts who are later diagnosed with cancer will be moved to the cancer cases cohort. The primary aim is to train and validate a machine learning algorithm to detect cancer, which will be evaluated by AUROC. Secondary aims include training and validating an algorithm to predict ToO and stage of cancer, exploring differences in performance by demographics and estimating how sensitivity varies across specificity cut-offs of 95%, 99% and 99.9%. These results will provide a statistically powered estimate of how well the Enlighten test can discriminate between individuals with and without cancer, which can then be validated for clinical use in further research.

Ethics and dissemination

This study is sponsored by University Hospital Southampton NHS Foundation Trust and has been approved by the Health Research Authority and Health and Care Research West Midlands (24/WM/0234). Results will be presented at scientific meetings and published in international peer-reviewed journals. Lay summaries of study progress and findings will be published on the Southampton Clinical Trial Unit’s website.

Trial registration number

ISRCTN17299125.

Clinical practice guidelines for the care of people experiencing chronic primary pain: protocol for a systematic review with interpretation against an established chronic pain care priority framework

Por: Briggs · A. M. · Siegfried · N. · Waller · R. · OConnell · N. E. · Romero · L. · Klem · N.-R. · Ampiah · P. K. · Belton · J. L. · Blyth · F. M. · De Morgan · S. · Lord · S. M. · Nicholas · M. · OSullivan · P. B. · Shakya · A. · Smith · A. J. · Slater · H.
Introduction

Most clinical practice guidelines (CPGs) for assessing and managing people’s chronic pain focus on specific pain conditions, body sites or life course stages. This creates complexity for clinicians making care choices in the absence of a diagnosis and/or where a person experiences more than one pain condition. Specific to this context is the ICD-11 classification of chronic primary pain where an experience of pain cannot be better accounted for by another condition. CPGs for chronic primary pain, agnostic to condition or body part, may support clinicians towards best pain care since many of the principles of person-centred chronic pain care are transdiagnostic. The two aims of this systematic review are to (1) identify and appraise CPGs for chronic primary pain, relevant across the life course and (2) map the CPG content against a pain care priority framework to evaluate the extent to which the CPG content aligns with the priorities of people with lived chronic pain experience.

Methods and analysis

We will systematically search nine scholarly databases, the Epistemonikos database and international and national guidelines clearinghouses. CPGs published within 2015–2025, in any language, that offer recommendations about assessment and/or management of chronic primary pain for people of any age, excluding hospitalised inpatients or institutionalised populations, will be included. Pairs of reviewers will independently screen citations for eligibility and appraise CPG quality and implementation potential using the Appraisal of Guidelines for Research and Evaluation (AGREE)-II and the AGREE-Recommendations Excellence tools, respectively. Data extraction will include the citation and scope characteristics of each CPG, methods used to develop recommendations, verbatim recommendations, guiding principles or practice information and narrative excerpts related to the GRADE Evidence-to-Decision (EtD) considerations (or equivalent). We will use the PROGRESS-PLUS framework as a checklist to identify whether determinants of health equity were considered by guideline developers. CPG recommendations will be organised according to common topics and categorised in a matrix according to strength and direction. Qualitative content analysis will be used to synthesise excerpts relating to GRADE EtD considerations (or equivalent), and we will map extracted data against an established chronic pain care priority framework to determine the extent to which the CPGs align with values and preferences of people with lived experience. Interpretation will be informed by an interdisciplinary Advisory Group, including lived experience partners.

Ethics and dissemination

Ethical approval is not required for this systematic review. Results will be disseminated through publication in an open-access peer-reviewed journal, through professional societies, and integrated into education curricula and public-facing resources. Reporting will be consistent with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) statement.

PROSPERO registration number

CRD420251000482.

Efficacy of peroneal nerve functional electrical stimulation (FES) for the reduction of bradykinesia in Parkinsons disease: an assessor-blinded randomised controlled trial (STEPS II)--study protocol

Por: Tufft · A. · Neilens · H. · Marsden · J. · Creanor · S. · Ali · A. · Donovan-Hall · M. · Aspinall · P. · Lord · A. · Jones · B. · Taylor · P.
Introduction

Difficulty with walking can lead to reduced quality of life for people with Parkinson’s disease (pwPD); improving walking is considered a treatment priority. Drug therapies can control PD symptoms; however, pwPD often still experience mobility problems.

Functional electrical stimulation (FES) induces movement in weak muscles via external electrical stimulation. FES is used in stroke and multiple sclerosis patients to correct dropped foot by stimulating the common peroneal nerve and is associated with improved quality of life and mobility. The randomised feasibility study preceding this definitive study showed that daily FES can produce a clinically meaningful improvement in walking speed in pwPD; this was sustained 4 weeks after FES was withdrawn. STEPS II is the first definitive randomised controlled trial, with blinded outcome assessment, aiming to determine the efficacy of FES in pwPD.

Methods and analysis

STEPS II is a two-group, parallel, assessor-blinded, superiority randomised controlled trial with an internal pilot, designed to compare FES plus usual care versus usual care alone. 234 participants will be randomised across eight UK sites. Telephone pre-screening and face-to-face screening will determine eligibility. The intervention group will attend four unblinded FES visits to receive the device and assess walking with and without FES. All participants have blinded assessments at baseline and weeks 2, 6, 18 and 22. The primary objective is to compare whole body bradykinesia at 18 weeks post-baseline via changes in 10m walking speed. Secondary objectives will assess the wider effects of FES on Parkinsonian gait and quality of life. An embedded qualitative component will explore wider experiences of FES.

Ethics and dissemination

This study received ethical approval from the Yorkshire and The Humber-Sheffield Research Ethics Committee (reference 23/YH/0193). A Data Monitoring Committee and Trial Steering Committee will provide independent oversight. Dissemination will be via publications, conferences and social media. FES intervention and training materials will be made open access.

Trial registration number

ISRCTN13120555.

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