Conectar
by Elizabeth Youens, Dan G. O’Neill, Zoe Belshaw, Johanna Neufuss, Mickey S. Tivers, Rowena M. A. Packer
Extreme conformation and reduced genetic diversity are recognised to lead to severely reduced health, welfare and longevity in certain dog breeds. There is growing interest in applying strategic crossbreeding to promote more moderate conformations and greater genetic diversity within currently problematic breeds. Crossbreeding could therefore lead to more rapid and effective improvements in welfare compared to current practices of within-breed selection. Deliberate crossbreeding between distinct different dog breeds is not a new concept; it was historically commonly used to create the current pure breeds, to increase genetic diversity and to bring new physical and/or temperament traits into existing breeds. However, a recent surge in the popularity of ‘designer crossbreeds’ (intentional crosses between established purebreds) has elicited fresh interest around the potential positives and negatives of crossbreeding practices. Further research on crossbred brachycephalic dogs is urgently required for a greater understanding of the motivators and barriers to their acquisition. An online survey explored factors that motivate dog breed choice and acquisition of both crossbreed and purebred dogs. In addition, the survey used both closed and open questioning to explore the UK public’s perceptions of crossbreeding, specifically (i) between a brachycephalic breed and a non-brachycephalic breed, and (ii) between two non-brachycephalic breeds. Free-text results were analysed using content analysis and subsequently quantified. Results from 4,899 participants identified that key motivators to acquire a brachycephalic crossbreed vs a brachycephalic purebred included perceptions of improved health, including the reduction in risk of breed and conformation-related disorders, and increased genetic diversity. However, the desire to acquire a purebred dog, or even a specific breed, remained a significant barrier to crossbreed acquisition, alongside concerns surrounding the ethics of crossbreeding. Other barriers included perceived negative changes to appearance and temperament of the offspring from crossbreeding. The current study identified a common set of acquisition decision-making factors across all ownership groups, including desiring a dog who the owner perceives to enjoy being loved and to enjoy physical affection, but further demonstrated that good health is of motivational low priority to some dog owners, particularly to owners of purebred brachycephalic dogs. The mix of positive and negative public perceptions and beliefs around crossbreeding and crossbreed dogs demonstrate the need for further research into the health, temperament and appearance of brachycephalic crossbreed dogs. The suitability of crossbreed dogs as an alternative to certain current purebred breeds with high risk of genetic or conformational disorders depends on both public desire and on evidence-based selection of suitable breeds to encourage crosses which maximise canine welfare.
by Mary O’Keeffe, Nathan Skidmore, Arianna Bagnis, Przemysław Bąbel, Elżbieta A. Bajcar, Alessandra De Palma, Andrea W.M. Evers, Eveliina Glogan, Julia W. Haas, Stefanie H. Meeuwis, Marek Oleszczyk, Antonio Portolés, Johan W.S. Vlaeyen, Katia Mattarozzi, on behalf of PANACEA Consortium
BackgroundPlacebo and nocebo effects significantly influence health outcomes, yet healthcare professionals receive limited training and guidance on their mechanisms and clinical application, creating a gap in education and practical understanding. Conducted within the European PANACEA Consortium, this study evaluated healthcare professionals’ knowledge, attitudes, and practices regarding placebo and nocebo effects, and assessed their needs in further education.
MethodsAn online cross-sectional survey among a European multi-country convenience sample of healthcare professionals collected data assessing participants’ knowledge, perceptions, and experiences regarding placebo and nocebo effects; their application and ethical considerations in clinical practice; and investigated educational needs and interest in further training. Quantitative data were analyzed using descriptive statistics, and thematic analysis was applied to the free-text responses.
ResultsAmongst 807 participants, 71.7% reported taking advantage of placebo effects in their practice, and over half of participants (55.8%) observing nocebo effects. Participants reported feeling somewhat confident (53.3%) in harnessing placebo effects with 47.5% feeling confident in preventing nocebo effects. The majority of respondents had not received formal training on placebo and nocebo effects, with most expressing an interest in further training in areas such as healthcare education, emphasizing communication skills to enhance placebo effects, and knowledge to recognize and reduce nocebo effects.
ConclusionsThere is a significant need for more comprehensive training on placebo and nocebo effects, particularly in early health professional education. These findings informed the development of educational resources and best practice recommendations developed as part of the outcomes from the PANACEA Consortium, improving the understanding and application of these effects among healthcare professionals across Europe.
by Qian Yue Tan, Kinda Ibrahim, Helen C. Roberts, Khaled Amar, Simon D.S. Fraser
BackgroundPeople with Parkinson’s (PwP) and their caregivers have to manage multiple daily healthcare tasks (treatment burden). This can be challenging and may lead to poor health outcomes.
ObjectiveTo assess the extent of treatment burden in Parkinson’s disease(PD), identify key modifiable factors, and develop recommendations to improve treatment burden.
MethodsA mixed-methods study was conducted consisting of: 1) a UK-wide cross-sectional survey for PwP and caregivers using the Multimorbidity Treatment Burden Questionnaire (MTBQ) to measure treatment burden levels and associated factors and 2) focus groups with key stakeholders to discuss survey findings and develop recommendations.
Results160 PwP (mean age = 68 years) and 30 caregivers (mean age = 69 years) completed the surveys. High treatment burden was reported by 21% (N = 34) of PwP and 50% (N = 15) of caregivers using the MTBQ. Amongst PwP, higher treatment burden was significantly associated with advancing PD severity, frailty, a higher number of non-motor symptoms, and more frequent medication timings (>3 times/day). Caregivers reporting higher treatment burden were more likely to care for someone with memory issues, had lower mental well-being scores and higher caregiver burden. Three online focus groups involved 11 participants (3 PwP, 1 caregiver and 7 healthcare professionals) recruited from the South of England. Recommendations to reduce treatment burden that were discussed in the focus groups include improving communication. clear expectation setting, and better signposting from healthcare professionals, increasing education and awareness of PD complexity, flexibility of appointment structures, increasing access to healthcare professionals, and embracing the supportive role of technology.
ConclusionsTreatment burden is common amongst PwP and caregivers and could be identified in clinical practice using the MTBQ. There is a need for change at individual provider and system levels to recognise and minimise treatment burden to improve health outcomes in PD.
by Darren Curnoe, Mohammed S. Sauffi, Hsiao Mei Goh, Xue-feng Sun, Roshan Peiris
The rarity of Late Pleistocene hominin remains from Insular Southeast Asia (ISEA) has hampered our ability to understand a crucial episode of human evolutionary history, namely, the global dispersal of Homo sapiens from Africa. Moreover, recent discoveries indicate a surprising level of taxic diversity during this time with at least two species—H. floresiensis and H. luzonensis—endemic to the region when H. sapiens first arrived. A third hominin dubbed the ‘Denisovans’ is shown from DNA evidence to have interbred with the ancestors of contemporary Indigenous populations across ISEA, New Guinea and Australia. Yet, the Denisovans have not been identified from the fossil record of the area despite recent breakthroughs in this regard on mainland East Asia. New excavations by our team at the Trader’s Cave in the Niah National Park (‘Niah Caves’), northern Borneo, have yielded an isolated hominin upper central permanent incisor dated with Optically Stimulated Luminescence dating of sediments to about 52 − 55 thousand years ago. Specimen SMD-TC-AA210 has a massive crown absolutely and relative to its root size, the crown is wide (mesiodistally) and relatively short (labiolingually). Morphologically, it exhibits a very strong degree of labial convexity, pronounced shovelling, and the bulging basal eminence exhibits several upward finger-like projections. Labial enamel wrinking on the enamel-dentine junction is expressed as two large ridges exhibiting numerous spine-like projections, and the lingual extensions on the enamel surface of the basal eminence are expressed as six extensions. This combination of crown size and morphological traits is not normally found in H. sapiens and instead characterises archaic members of Homo such as H. erectus, H. neanderthalensis and Middle Pleistocene hominins sharing a clade with H. heidelbergensis. The Trader’s Cave tooth suggests that an archaic hominin population inhabited northern Borneo just prior to or coincident with the arrival of H. sapiens as documented at the nearby West Mouth of the Niah Great Cave.
by Shirley Ge, Hope Lappen, Luz Mercado, Kaylee Lamarche, Theodore J. Iwashyna, Catherine L. Hough, Virginia W. Chang, Adolfo Cuevas, Thomas S. Valley, Mari Armstrong-Hough
BackgroundRacial and ethnic disparities in the delivery and outcomes of critical care are well documented. However, interventions to mitigate these disparities are less well understood. We sought to review the current state of evidence for interventions to promote equity in critical care processes and patient outcomes.
MethodsFour bibliographic databases (MEDLINE/PubMed, Web of Science Core Collection, CINAHL, and Embase) and a list of core journals, conference abstracts, and clinical trial registries were queried with a pre-specified search strategy. We analyzed the content of interventions by categorizing each as single- or multi-component, extracting each intervention component during review, and grouping intervention components according to strategy to identify common approaches.
ResultsThe search strategy yielded 11,509 studies. Seven-thousand seventeen duplicate studies were removed, leaving 4,491 studies for title and abstract screening. After screening, 93 studies were included for full-text review. After full-text review by two independent reviewers, eleven studies met eligibility criteria. We identified ten distinct intervention components under five broad categories: education, communication, standardization, restructuring, and outreach. Most examined effectiveness using pre-post or other non-randomized designs.
ConclusionsDespite widespread recognition of disparities in critical care outcomes, few interventions have been evaluated to address disparities in the ICU. Many studies did not describe the rationale or targeted disparity mechanism for their intervention design. There is a need for randomized, controlled evaluations of interventions that target demonstrated mechanisms for disparities to promote equity in critical care.
by Dilara Tank, Bianca G. S. Schor, Lisa M. Trommelen, Judith A. F. Huirne, Iacer Calixto, Robert A. de Leeuw
PurposeTransvaginal ultrasound (TVUS) is pivotal for diagnosing reproductive pathologies in individuals assigned female at birth, often serving as the primary imaging method for gynecologic evaluation. Despite recent advancements in AI-driven segmentation, its application to gynecological ultrasound still needs further attention. Our study aims to bridge this gap by training and evaluating two state-of-the-art deep learning (DL) segmentation models on TVUS data.
Materials and methodsAn experienced gynecological expert manually segmented the uterus in our TVUS dataset of 124 patients with adenomyosis, comprising still images (n = 122), video screenshots (n = 472), and 3D volume screenshots (n = 452). Two popular DL segmentation models, U-Net and nnU-Net, were trained on the entire dataset, and each imaging type was trained separately. Optimization for U-Net included varying batch size, image resolution, pre-processing, and augmentation. Model performance was measured using the Dice score (DSC).
ResultsU-Net and nnU-Net had good mean segmentation performances on the TVUS uterus segmentation dataset (0.75 to 0.97 DSC). We observed that training on specific imaging types (still images, video screenshots, 3D volume screenshots) tended to yield better segmentation performance than training on the complete dataset for both models. Furthermore, nnU-Net outperformed the U-Net across all imaging types. Lastly, we report the best results using the U-Net model with limited pre-processing and augmentations.
ConclusionsTVUS datasets are well-suited for DL-based segmentation. nnU-Net training was faster and yielded higher segmentation performance; thus, it is recommended over manual U-Net tuning. We also recommend creating TVUS datasets that include only one imaging type and are as clutter-free as possible. The nnU-Net strongly benefited from being trained on 3D volume screenshots in our dataset, likely due to their lack of clutter. Further validation is needed to confirm the robustness of these models on TVUS datasets. Our code is available on https://github.com/dilaratank/UtiSeg.
by Gebremedhin Gebreegziabher Gebretsadik, Andargachew Kassa Biratu, Alemayehu Bayray Kahsay, Amanuel Gessessew, Zohra S. Lassi, Hailemariam Segni, Afework Mulugeta
BackgroundAdverse pregnancy outcomes continue to pose a significant global public health challenge, especially in low- and middle-income countries. Although preconception care (PCC) interventions are advised to address this problem, their adoption remains inadequate, supported by scarce evidence particularly in conflict-impacted areas such as Tigray, Ethiopia, where rates of poor outcomes like neural tube defects are notably higher than in other regions. This study investigates the experience of pregnant women regarding the use of PCC in the Tigray, northern Ethiopia.
MethodsA community-based cross-sectional study was conducted from July 31 to August 16, 2024, involving 764 pregnant women in their first or second trimester. Participants were consecutively enrolled from clusters until the predetermined sample size was achieved. Data were collected through interviewer-administered questionnaires in accordance with World Health Organization, and Centers for Disease Control and Prevention, and national guidelines. PCC uptake was measured as the receipt of any service component (screening, counseling, or management) during healthcare consultations. We used SPSS version 27.0 to analyze PCC uptake and its associated factors. Descriptive and binary logistic regression statistics were used in the analysis. Finally, data was presented using text, tables, and figures as appropriate.
ResultsIn this study, the overall uptake of PCC services was 7.2%. All participants in the current pregnancy were exposed to at least one risk factor for adverse pregnancy outcomes. Factors such as women’s decision-making power, having information about PCC, HIV screening during the current pregnancy, and perceived susceptibility to preconception risks showed a statistically significant positive association with the uptake of PCC services.
ConclusionThe uptake of PCC services was very low. Addressing the low uptake of PCC services requires a multifaceted strategy, including public health campaigns via media and social forums, strengthened health extension programs, and the integration of a reproductive life plan tool to improve health-seeking behavior among women.
by Menucha Jurkowicz, Michael Solomovich, Eugene Leibovitz, Nathan Keller, Dafna Yahav, Galia Barkai, Nofar Atari, Ilana S. Fratty, Hodaya Cohen, Ana Belkin, Yaniv Lustig, Michal Stein, Michal Mandelboim
BackgroundHuman rhinovirus (HRV) is a major cause of respiratory illness, however data on clinical presentation, outcomes across age-groups and associations with HRV subtypes are limited.
MethodsClinical characteristics and outcomes of hospitalized HRV-positive patients with cycle threshold (Ct)≤32 were collected retrospectively and analyzed in relation to age-groups and subtypes.
ResultsAmong 738 patients, the age distribution was: 0–1 (148,20.1%), 1–3 (94,12.7%), 3–5 (44,5.9%), 5–18 (76,10.3%), 18–40 (51,6.9%), 40–65 (95,12.9%) and ≥65 (230,31.2%). Younger children more frequently presented with bronchiolitis and asthma exacerbation, while older adults experienced higher rates of pneumonia and chronic obstructive pulmonary disease (COPD) exacerbation. ICU admissions and mechanical ventilation were more common in younger children, whereas oxygen support was predominant in older adults. Of 119 sequenced samples, HRV-A was the predominant species (69%), followed by HRV-C (28.5%), with both exhibiting considerable genetic subtype diversity. Lower respiratory tract infection (LRTI) associated with HRV-C was found only in adults while severe and critical outcomes with HRV-A and HRV-C occurred in both children and adults. When compared with human metapneumovirus (hMPV), a known pathogenic respiratory virus, no differences in severe outcomes were noted, however, HRV patients aged ≥65 had a higher proportion of critical outcomes.
ConclusionsHRV infection is associated with significant morbidity across age-groups, with distinct clinical presentation and outcomes. ICU admissions were more frequent in children, while older adults required oxygen support. The genetic diversity and age-related differences in HRV subtypes underscore its clinical impact in both pediatric and adult populations.
by Brandon Hergert, Kristin M. Whitworth, Devorah C. Goldman, Lisa Moreau, Kelsey McQueen, Kalindi Parmar, Alan D’Andrea, Melissa S. Samuel, Kevin D. Wells, Randall S. Prather, Craig Dorell, Markus Grompe, William H. Fleming
Although small animal models of Fanconi anemia (FA) are useful, they do not faithfully replicate many of the clinical features seen in FA patients. We reasoned that a porcine model of FA with its similar physiology and a relatively long lifespan would produce a phenotype more similar to human FA. Targeting FANCA in domestic swine resulted in skeletal abnormalities and extreme sensitivity to interstrand DNA cross-linking agents. In addition, FANCA disruption followed by mitomycin C treatment resulted in a > 10-fold increase in chromosomal radials, a finding that is considered diagnostic for human FA. Bone marrow derived, hematopoietic progenitor cells from a FANCA null pig showed a 75% reduction in colony forming activity compared to wild type. Evaluation of steady state hematopoiesis in the peripheral blood revealed the gradual development of red cell macrocytosis and a reduction in circulating neutrophils. Targeting of FANCD2 failed to produce any biallelic animals demonstrating the loss of FANCD2 function is embryonic lethal in pigs. These results indicate that a porcine model of FANCA holds promise for the development of strategies to prevent the development of bone marrow failure and malignancies in patients with FA.
by Wenxin Lu, Ellen A. Eisen, Liza Lutzker, Elizabeth Noth, Tim Tyner, Fred Lurmann, S. Katharine Hammond, Stephanie Holm, John R. Balmes
BackgroundAmbient air pollutants such as particulate matter (PM), ozone (O3), and nitrogen dioxide (NO2) have been associated with lower lung function among children. However, the reported associations could be due to correlation with other pollutants.
ObjectiveWe investigate the relationships between exposures to eight ambient air pollutants and children’s lung function and apply mixture analysis to identify key contributors to health effects.
MethodsThe Children’s Health and Air Pollution Study (CHAPS) in Fresno, California, is a prospective cohort study that recruited 299 children and assessed their lung function at two visits, at approximately 7 and 9 years of age. The children’s forced expiratory volume in the first second (FEV1), forced vital capacity (FVC), and FEV1/FVC ratio were standardized using the Global Lung Function Initiative (GLI) race-neutral calculators. We assessed the children’s average daily residential exposures to PM2.5, PM10, nitrogen oxides (NOx), NO2, O3, carbon monoxide (CO), elemental carbon (EC), and polycyclic aromatic hydrocarbons (PAHs), during the 1-week, 1-month, 3-month, 6-month, and 12-month periods before each visit, and the 2 years between visits. We applied linear mixed-effect models and quantile-based g-computation (q-gcomp) for statistical analysis.
ResultsThe children’s exposures to the eight ambient air pollutants exhibited high intercorrelation: Seven air pollutants were positively correlated, while O3 exposures were negatively correlated with the other pollutants. Higher PM10 was associated with lower FEV1 and FEV1/FVC ratio, and the associations were strongest for the 3-month exposure timeframe. Q-gcomp also identified PM10 as the key pollutant associated with lower FEV1 and FEV1/FVC ratio.
ConclusionAmong the eight ambient air pollutants, PM10 was the strongest risk factor for impaired lung function among children in Fresno. Ambient air pollution levels in this community exceed regulatory standards and are harmful to children’s lung function.
by Jasmine J. Su, Vasco S. Kupua, Daniel Cummings, Kathryn H. Jacobsen
ObjectivesAngola is one of the countries with the highest prevalence of sickle cell disease (SCD). Neonatal SCD testing is recommended by the Angolan government, but it is not routinely performed. Nearly all previous studies of SCD have been conducted in cities. We implemented a neonatal SCD screening program in a referral hospital in Huíla province to examine the epidemiology of SCD in this Umbundu-speaking population and to demonstrate the feasibility of using point-of-care (POC) tests for SCD in a rural setting.
MethodsBetween October 2024 and February 2025, we screened 353 infants less than one month old at Hospital Evangélico de Caluquembe for the hemoglobin S (HbS) gene using HemoTypeSC rapid diagnostic tests. We also reviewed all pediatric outpatient visits from 2024 to identify newly-diagnosed SCD cases.
ResultsTwenty-one (6.0%) of the 353 neonates had sickle cell trait (HbAS); none had SCD (HbSS). The outpatient register review identified 26 incident cases of SCD.
ConclusionsThe prevalence of HbS is lower in Caluquembe than in Luanda and Cabinda, but the combined results of our newborn screening and pediatric records provide evidence that there is a burden of disease from SCD in Caluquembe and the surrounding areas. Sickle cell screening and treatment programs should be available in all high-burden areas, not just large cities. The per-test costs may still be too expensive for universal newborn screening to be scaled up nationwide, but our pilot study demonstrates that POC tests can be a cost-effective method that yields immediate results.
by Sabine Scully, Bernadette Earley, Paul E. Smith, Matthew S. J. Finnie, Catherine McAloon, Frank Buckley, David A. Kenny, Sinéad M. Waters
There is increasing evidence to support the existence of a naturally occurring colostral microbiome, which may influence the development of the gastrointestinal microbiota and immune function of the calf. The objective of this study was to characterize the prokaryotic community of colostrum collected fresh (within 2h parturition) from primi- and multiparous Holstein-Friesian (n = 17) and Jersey (n = 10) cows. Extracted microbial DNA underwent qPCR and Illumina amplicon sequencing of the V4 region of the 16S rRNA gene. High throughput amplicon sequencing data was analysed using a variety of R packages. Taxonomy was assigned using the SILVA database (v. 138.1). No effect of breed or parity was observed on alpha (α; Shannon) diversity and community composition. The mean Shannon score was 3.33 (SE 0.14), indicating a diverse community within sample. A total of 681 genus-level amplicon sequence variant (ASV) groups were identified prior to filtering for relative abundance (RA) of >0.05%. Nineteen bacterial genera were identified as core. The predominant bacterial phyla observed were Bacillota, Pseudomonadota, and Actinomycetota. Community membership consisted of common gut commensals, with many members exhibiting diverse metabolic functions. Within the archaeal community, Methanobrevibacter had the highest RA, accounting for 85.99%. No observed differences between breeds suggests that farm origin may be more influential than breed on microbiota composition. The presence of archaea and strict anaerobes highlights the need to investigate the existence of an entero-mammary pathway in cattle. This is the first study jointly characterising bacteria and archaea in colostrum from different breeds from the same dairy herd under pasture-based conditions. The diverse bacterial community observed warrants further investigation into its role in calf health in early life. Specific microbes, like Lachnospiraceae, should be investigated for their potential in the development of probiotics and preventative practices for better calf health.
by Lauren S. Tailor, Hilary K. Brown, Jessie Cunningham, Simone N. Vigod, Erzsébet Horváth-Puhó, Sonia M. Grandi
ObjectiveThe goal of this scoping review is to summarize how prior studies have measured antidepressant continuation/discontinuation prior to, during, and after pregnancy.
IntroductionPregnant individuals and healthcare providers are faced with difficult decisions about whether to continue antidepressants in pregnancy due to the historical exclusion of pregnant women from clinical trials and the lack of rigorous evidence to support these decisions. Prior studies examining the effects of pre- and perinatal antidepressant use on perinatal outcomes using observational data have been inconsistent, primarily due to the binary (ever/never) categorization of exposure, which may not accurately reflect real-world use.
Inclusion criteriaThe population for this review consists of pregnant individuals. The concept is the measurement of continued preconception, prenatal, and postpartum antidepressant use. We will include human studies (no restrictions on language or geographic location) with the following study designs: cohort studies, cross-sectional studies, case-control studies, and descriptive analyses or spontaneous reports that reference antidepressant use over time.
MethodsWe will conduct a scoping review using the JBI (formerly Joanna Briggs Institute) manual for scoping reviews and the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews Checklist (PRISMA-ScR). The search strategy will be performed using database-specific nomenclature in MEDLINE, EMBASE, PsycINFO, Cochrane, Web of Science, and Canada’s Drug Agency Grey Matters Guide for grey literature, limiting the final search to publications since 2022 to include contemporary data. Two independent reviewers will 1) screen titles/abstracts/full-texts and 2) extract data. Findings will summarize measurements of antidepressant continuation during the perinatal period, categorizing studies based on the descriptions of timing, duration, adherence, and exposure ascertainment.
ConclusionThis scoping review will establish the extent to which prior studies have been able to measure continued use to inform a clear definition of continued antidepressant exposure to be used in future studies. Review registration: Open Science Framework https://osf.io/2ewpq
by Mohammad K. Siddiqui, Shagufta Khan, Rinchenla Bhutia, Vivek Nair, Ashok Rai, Nirmal Gurung, Tseten Yamphel, Peggy K. Dadul, Debya S. Kerongi, Karma Doma Bhutia, Jagat Pradhan, Kabita Khati, Sreenivas A. Nair, Shamim Mannan, Kiran K. Rade, Dinesh Gupta, Pawan Malhotra, L. Masae Kawamura, Shikha Dhawan, Asif Mohmmed
BackgroundMonasteries in India house individuals from childhood to advanced age. These congregate settings amplify tuberculosis (TB) transmission and exposure when the disease is present, especially in the high burden areas like Sikkim, India. However, the prevalence of active-TB disease (ATB), tuberculosis infection (TBI), and their associated risk factors have not been studied. The diagnosis and treatment of TBI remain a major bottleneck in eradicating TB. ATB and TBI risk among residents living in the congregate setting of monasteries in Sikkim, India, a high-TB burden area, may be high due to high-density living quarters, public interaction and their frequent travel history but has never been illustrated.
MethodA cross-sectional screening of the monks and residents of Rumtek Monastery (Sikkim, India) was carried out to assess extent of ATB and TBI in a congregate setting. TrueNat MTB and GeneXpert MTB/Rif systems were utilized for ATB diagnosis, whereas QuantiFERON-TB Gold Plus (QFT-plus) Interferon-gamma release assay (IGRA) analysis was used for TBI detection. Follow-up sputum testing by TrueNat MTB was performed on IGRA-positive individuals to exclude ATB.
ResultsAmong the 350 inhabitants of the monastery, 7% (25/350) were found to be symptomatic for TB, whereas 93% (325/350) were asymptomatic. Out of them, 189 participants, including symptomatic cases, agreed to participate in the study and were screened for TBI; however, 15 participants were excluded from the study due to result discrepancies. None of the participant were diagnosed with active tuberculosis (ATB), although, 44.2% (77/174) were found to be positive for TBI; however, none of those with TBI progressed to ATB during one year follow-up. Risk factors for TBI included: advancing age, frequent travel history, family history of TB or having contacts with TB patients and abnormal Body Mass Index (BMI) ≤18.5- ≥ 25.
ConclusionThis study confirms the high prevalence of TBI among residents in the congregate setting of monasteries, and justify TB prevention strategies by targeted screening, TBI testing and preventive treatment in congregate settings of high TB burden areas.
by Martin Chebet, Kathy Burgoine, Joseph Rujumba, Noela Regina Akwi Okalany, Peter Olupot-Olupot, Thorkild Tylleskär, Andrew D. Weeks, Agnes Napyo, David Mukunya, Ingunn Marie S. Engebretsen
BackgroundIn sub-Saharan Africa, stillbirth rates remain high. To design effective interventions to reduce stillbirths, accurate determination of their aetiology is important. Conventional autopsy for accurate confirmation of cause is not acceptable or feasible in several societies in sub-Saharan Africa; minimal invasive tissue sampling (MITS), is a recently developed, less invasive alternative. In this study, we explored the acceptability of MITS in the community and among healthcare workers in Uganda to guide the future implementation.
MethodsA qualitative study was done among community members and healthcare workers in Mbale in Eastern Uganda. We undertook in-depth interviews and focus group discussions in English or local languages. Interviews were audio-recorded, transcribed as necessary prior to formal content analysis. The themes were organised using NVivo software and presented according to Sekhon’s theoretical framework.
ResultsOverall, participants preferred the idea of MITS to conventional autopsy because of the perception that it was fast, maintained the facial appearance and kept the body intact. It was thought that the procedure would improve the detection of the cause of stillbirths, which in turn would help to prevent future stillbirths. It would also resolve conflicts in the community between community members or the women and the healthcare workers about the cause of a stillbirth. It was suggested that some community members may not approve of MITS because of their religious beliefs; the fear that the body parts may be extracted and stolen for witchcraft or organ donation; and a lack of trust in the healthcare system. To implement the procedure, it was suggested that extensive community sensitization should be done, space limitations in healthcare facilities overcome, healthcare workers should be trained and limited human resource should be addressed.
ConclusionThe implementation of MITS in Mbale, Eastern Uganda, is likely to be acceptable given sufficient training and sensitisation.
by Claudia Castro, Jacquelyn Badillo, Melissa Tumen-Velasquez, Adam M. Guss, Thomas S. Collins, Frank Harmon, Devin Coleman-Derr
Recent wildfires near vineyards in the Pacific United States have caused devastating financial losses due to smoke taint in wine. When wine grapes (Vitis vinifera) are exposed to wildfire smoke, their berries absorb volatile phenols derived from the lignin of burning plant material. Volatile phenols are released during the winemaking process giving the finished wine an unpleasant, smokey, and ashy taste known as smoke taint. Bacteria are capable of undergoing a wide variety of metabolic processes and therefore present great potential for bioremediation applications in many industries. In this study, we identify two strains of the same species that colonize the grape phyllosphere and are able to degrade guaiacol, a main volatile phenol responsible for smoke taint in wine. We identify the suite of genes that enable guaiacol degradation in Gordonia alkanivorans via RNAseq of cells growing on guaiacol as a sole carbon source. Additionally, we knockout guaA, a cytochrome P450 gene involved in the conversion of guaiacol to catechol; ΔguaA cells cannot catabolize guaiacol in vitro, providing evidence that GuaA is necessary for this process. Furthermore, we analyze the microbiome of berries and leaves exposed to smoke in the vineyard to investigate the impact of smoke on the grape microbial community. We found smoke has a significant but small effect on the microbial community, leading to an enrichment of several genera belonging to the Bacilli class. Collectively, this research shows that studying microbes and their enzymes has the potential to identify novel tools for alleviating smoke taint.
by Catarina Simões, Diana S. Vasconcelos, Raquel Xavier, Xavier Santos, Catarina Rato, D. James Harris
Fire has long been recognized as an important ecological and evolutionary force in plant communities, but its influence on vertebrate community ecology, particularly regarding predator-prey interactions, remains understudied. This study reveals the impact of wildfires on the diet of Podarcis lusitanicus, a lizard species inhabiting a fire-prone region in the Iberian Peninsula. In order to explore diet variability associated with different local burn histories, we evaluated P. lusitanicus diet across three types of sites in Northern Portugal: those had not burned since 2016, those burned in 2016, and those more recently burned in 2022. Podarcis lusitanicus is a generalist arthropod predator with dietary flexibility. Given the turnover of arthropod species after fire, it is expected to find variations in diet caused by different fire histories, especially between unburned and recently burned sites. From DNA metabarcoding of faecal samples, our study revealed that while prey richness remained unaffected by wildfire regime, significant shifts occurred in diet composition between more recently burned and unburned areas. Specifically, we found that differences in diet composition between these two fire regimes were due to the presence of Tapinoma ants and jumping spiders (Salticus scenicus). These prey were present in the diets of lizards occupying unburned areas, while these were absent in areas burned in 2022. Interestingly, diets in unburned areas and areas burned in 2016 showed no significant differences, highlighting the lizards’ ecological flexibility and the habitat’s resilience over time. The ant species T. topitotum was found in dominance in both burned areas, suggesting that this species may be fire tolerant. In addition, families such as Cicadellidae and Noctuidae were found to be more associated with more recently burned areas. The use of DNA metabarcoding in this study was essential to provide a more detailed and accurate view of predator-prey interactions in ecosystems susceptible to fire, and therefore a better understanding of changes in prey consumption in this fire-adapted ecosystem.
by Adedapo Olufemi Bashorun, Larry Kotei, Abdoulie F. Jallow, Ousubie Jawla, Emmanuel U. Richard-Ugwuadu, Muhammed Jagana, Lamin Bah, Amadou Tijan Bah, Karamo Conteh, Mamadou S.K. Jallow, Mehrab Karim, Bai Lamin Dondeh, Anne Segonds-Pichon, Gary M. Clifford, Iacopo Baussano, Bruno Pichon, David Jeffries, Ed Clarke
Human papillomavirus (HPV) infection is a primary cause of preventable deaths from cervical cancer, a condition of profound inequality with approximately 90% of deaths occurring in low- and middle-income countries, particularly in sub-Saharan Africa. In May 2018, the WHO Director-General declared a Joint Global Commitment to Cervical Cancer Elimination, highlighting the critical role of HPV vaccines in achieving this goal. However, there is a lack of systemically collected data on HPV prevalence in The Gambia, and impact data from high-income countries may not be reliably extrapolated to West African settings due to geographical variation in HPV types and distinct behavioural, biological, and sociodemographic exposures. The Gambia introduced a two-dose HPV vaccination schedule in 2019, but coverage has been very low, interrupted mainly by the COVID-19 pandemic. This presents a key opportunity to generate vital baseline data on HPV prevalence in the population before potential scale-up of vaccination efforts. The PHASE survey, a multi-stage cluster survey, aims to establish the baseline, population prevalence estimates of high-risk and low-risk, vaccine-type and non-vaccine-type HPV infection in 15- to 49-year-old females in The Gambia by measuring urinary HPV-DNA. The survey will also quantify the effects of various exposures on HPV prevalence, including sexual behaviour, the presence of other sexually-transmitted infections (STIs) - Neisseria gonorrhoea (NG), Chlamydia trachomatis (CT), Trichomonas vaginalis (TV), Mycoplasma genitalium (MG), syphilis, as well as blood borne viruses, human immunodeficiency virus (HIV), hepatitis B and hepatitis C; obstetric history, socio-demographic characteristics, and cervical cancer screening and/or treatment. Additionally, the study will provide important antimicrobial resistance (AMR) data for NG and MG in sub-Saharan Africa, a region poorly represented in global surveillance programs. This data is needed to guide regional treatment guidelines and advocate for new solutions, including gonococcal vaccines. The AMR data are expected to immediately influence recommendations regarding the appropriate choice of antibiotics for syndromic STI management in West Africa and hence to address an important driver of AMR in the sub-region. Leveraging on the Medical Research Council Unit The Gambia funded Health Demographic Surveillance system (HDSS) as its sampling frame, the survey will utilize validated diagnostic assays and culturally sensitive data collection methods, to ensure both scientific rigor and local relevance. Tools such as Audio Computer-Assisted Self-Interviewing (ACASI) technology, developed in consultation with local community advisory boards, are included to reduce social desirability bias in reporting sexual behaviour. This approach aims to maximize both the reliability and cultural appropriateness of the findings. This study directly addresses the critical need for baseline epidemiological data on HPV in a West African setting to accelerate vaccine impact and drive new interventions towards cervical cancer elimination. By understanding other factors that influence HPV (like other STIs, sexual behaviour, etc.), the study aims to ensure that, when the vaccine’s impact is measured later, changes in other confounding factors that may impact on HPV prevalence can be accounted for. The study will also establish the population prevalence of the measured STIs and their relationship to common symptoms and other adverse health outcomes related to STIs.
by Cheyenne R. Wagi, Renee McDowell, Anyssa Wright, Kathleen L. Egan, Christina S. Meade, April M. Young, Madison N. Enderle, Angela T. Estadt, Kathryn E. Lancaster
BackgroundHepatitis C virus (HCV) and injection drug use among young women are dramatically rising in the rural United States. From 2004 to 2017, heroin use among non-pregnant women increased 22.4% biennially, mirroring increases in HCV cases, especially among younger populations. Young women who inject drugs (YWID, ages 18–35) face elevated HCV risk due to biological, behavioral, and socio-cultural factors. Barriers to HCV testing and treatment services further delay diagnoses, fuel transmission, and limit access to harm reduction services. This study applies the Theoretical Domains Framework (TDF) to identify factors influencing HCV testing and treatment among YWID in rural Appalachia Ohio.
MethodsWe conducted in-depth interviews with YWID (n = 30) in 2023 to understand their HCV testing and treatment experiences in rural Appalachia Ohio. Interviews were transcribed, inductively coded, and analyzed using grounded theory. Identified themes were mapped onto the TDF domains.
ResultsKey TDF domains influencing HCV care included knowledge, beliefs about consequences, and intentions. While YWID knew where to get tested, they expressed uncertainty about treatment value and access while actively using drugs. Social influences, stigma, and mistreatment by healthcare providers created barriers to treatment. Environmental context and resources, such as transportation, also influenced access to care.
ConclusionsYWID in rural Appalachia face barriers to HCV care, such as gaps in knowledge about HCV treatment, which is compounded by gendered stigma, and logistical challenges. Rapidly changing treatment restrictions led to misinformation about treatment access. These gaps highlight the need for interventions specifically designed to address YWID lived experiences.
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