Tag: pubmed

BMC Glob Public Health. 2026 Apr 3;4(1):31. doi: 10.1186/s44263-026-00256-z.

ABSTRACT

BACKGROUND: Mozambique has a high burden of tuberculosis (TB) and in 2021, an estimated 18,000 persons with TB nationwide were not diagnosed. Estimates suggest that globally 47% of TB disease in prisons is undiagnosed. We implemented an integrated-care model health intervention to enhance the diagnosis and treatment of TB disease, provide TB preventive treatment (TPT), and identify and treat other undiagnosed health conditions in three prisons in Maputo, Mozambique.

METHODS: From July 11, 2023, through the second quarter of 2024, we systematically screened for TB using digital chest X-rays with computer-aided detection (DCXR-CAD). This was combined with symptom screening in a parallel algorithm. We conducted clinical assessments for other health conditions and delivered TPT. Graphs visually compare TB case notification trends with two control prisons, which continued the usual standard of care, symptom screening for TB. An interrupted time series (ITS) analysis was used to evaluate TB case notification counts before and after the intervention in the intervention prisons.

RESULTS: Of 7912 individuals screened, 264 new diagnoses of TB disease were notified, a TB screening yield of 3.34% and a number needed to screen of 30, and 1346 persons were initiated on TPT. Other conditions diagnosed and treated include HIV (28), malnutrition (830), and skin conditions (462). TB case notifications were higher in the intervention prisons during the intervention than in the preceding period in the same prisons. Comparing case notifications during the intervention with an equivalent period prior to the intervention showed an increase of about 52% in intervention prisons but a decrease in control prisons by the same magnitude. The ITS analysis found the effect of the intervention on TB case notification counts statistically significant in two of the intervention prisons: (incidence rate ratio [IRR] 3.96, 95% confidence interval [CI] 1.51-10.40; p = 0.005) and (IRR 6.17, 95% CI 2.17-17.55; p < 0.001).

CONCLUSIONS: Strengthening local infrastructure and implementing DCXR-CAD for screening likely contributed to a higher TB yield in the intervention prisons. Screening and diagnosing TB, delivering TB disease treatment and prevention, and addressing other health conditions simultaneously in this vulnerable population were feasible and important.

PMID:41933406 | DOI:10.1186/s44263-026-00256-z

Med Phys. 2026 Apr;53(4):e70414. doi: 10.1002/mp.70414.

ABSTRACT

BACKGROUND: Median nerve, a major peripheral nerve, connects the hand to the central nervous system, facilitating upper limb motor function and sensation by transmitting sensory data from the palm and fingers. Damage to this nerve can result in motor and sensory deficits, with carpal tunnel syndrome (CTS) causing compression, leading to tingling and numbness in the thumb, index, middle, and lateral ring fingers.

PURPOSE: This study aimed to develop an accurate deep-learning-based segmentation method for measuring the cross-sectional area (CSA) of the median nerve to facilitate the diagnosis of nerve entrapment syndromes and aid in surgical planning, with a focus on CTS.

METHODS: This study introduces MNSeg-Net, a novel lightweight multiscale feature fusion network with 2.46M parameters for median nerve segmentation in ultrasound (US) frames, specifically designed to enable a fully automated, end-to-end clinical setup supporting real-time segmentation and CSA computation. The dataset comprised 100 subjects and 30 000 ultrasound frames, which were split into training (80%), validation (10%), and testing (10%) subsets with subject-wise separation to avoid data leakage. MNSeg-Net was benchmarked against state-of-the-art segmentation models, including UNet and its variants (UNet++ and U2Net). The performance was assessed using metrics such as the Dice similarity coefficient (DSC) and CSA difference. The statistical significance of performance differences was evaluated using paired t-tests, effect size (Cohen’s d), and one-way ANOVA with Tukey’s HSD correction for multiple comparisons at a $p$ -value threshold of 0.05, while statistical equivalence between models within predefined margins was formally assessed using the two one-sided test (TOST) procedure. Following quantitative validation, the model was deployed in a real-time clinical setup utilizing an Av.io HD Epiphan frame grabber to stream ultrasound images from the ultrasound machine to a GPU-equipped system. A secondary display running parallel to the original ultrasound screen visualized the segmented median nerve and computed the CSA values in real time.

RESULTS: MNSeg-Net achieved high segmentation performance, with average DSC scores of 94.7% at the wrist and 83.4% from the wrist to the elbow, and the lowest Hausdorff distance, matching the performance of the best-performing 44-million-parameter heavy U2Net model. Compared to U2Net, MNSeg-Net showed no statistically significant difference in DSC performance ( $p=9.11\times {10}^{–1}$ ; Cohen’s $d=–0.003$ ; mean difference = -0.001), with formal equivalence testing confirming equivalence across all tested margins ( $\pm 0.01,\pm 0.03,\pm 0.05$ ). For CSA estimation, MNSeg-Net also showed no statistically significant difference from clinician-annotated values ( $p=1.14\times {10}^{–1}$ ; Cohen’s $d=–0.041$ ; mean difference = -0.081), and equivalence was established at the $\pm 0.5$ margin, confirming a strong alignment with expert clinical assessments. MNSeg-Net demonstrated real-time performance by processing up to 43 frames per second on a single GPU, successfully segmenting the median nerve and computing CSA from ultrasound frames.

CONCLUSION: The developed MNSeg-Net-based clinical system represents an important step toward real-time median nerve assessment, enabling a fully automated solution for CTS diagnosis. By combining a lightweight architecture, real-time processing capability, and successful clinical deployment, it represents a substantial advancement in the CTS detection and management.

PMID:41933401 | DOI:10.1002/mp.70414

Infect Agent Cancer. 2026 Apr 3. doi: 10.1186/s13027-026-00758-3. Online ahead of print.

ABSTRACT

OBJECTIVE: To evaluate the associations of plasma EBV-DNA and tumor EBV status with clinical outcomes in patients with AIDS-related non-Hodgkin lymphoma (ARL).

METHODS: We retrospectively analyzed ARL patients diagnosed at Shanghai Public Health Clinical Center between 2013 and 2021. Tumor EBV status was determined by EBV-encoded RNA (EBER) in situ hybridization, and plasma EBV-DNA was quantified using real-time PCR. Survival outcomes were evaluated using Kaplan-Meier analysis and Cox regression. Longitudinal EBV-DNA patterns during chemotherapy were classified into four groups: persistently negative, persistently positive, clearance, and conversion.

RESULTS: Among 183 ARL patients, 99 underwent tumor EBER testing with 45.5% (45/99) positivity. Survival analysis was performed in 85 ARL patients who received treatment. The 2-year overall survival (OS) did not differ by EBER status (positive: 63.2% vs. negative: 52.5%; HR 0.86, 95% CI 0.41-1.80; p = 0.695). Baseline plasma EBV-DNA was quantified in 52 patients, with 47 (90.4%) undergoing ≥ 4 tests during chemotherapy cycles. Baseline plasma EBV-DNA levels were not predictive of prognosis. However, detectable EBV-DNA during chemotherapy was associated with significantly inferior OS (p = 0.048) and remained an independent prognostic factor after adjustment. Longitudinal analysis showed no statistically significant survival differences among four EBV-DNA patterns (p = 0.074), but patients with persistently positive or conversion patterns exhibited poorer outcomes, while persistently negative or clearance patterns were associated with more favorable prognosis. Pairwise analysis confirmed significantly better survival in persistently negative compared with persistently positive patients (p = 0.016).

CONCLUSION: Dynamic monitoring of plasma EBV-DNA during chemotherapy provides important prognostic information in ARL. Persistent or newly detectable EBV-DNA identifies patients at higher risk of poor outcomes, supporting the clinical utility of longitudinal EBV-DNA assessment for risk stratification and treatment guidance.

PMID:41933387 | DOI:10.1186/s13027-026-00758-3

Parasit Vectors. 2026 Apr 3. doi: 10.1186/s13071-026-07346-9. Online ahead of print.

ABSTRACT

BACKGROUND: Belgium will likely be confronted with the introduction of West Nile virus (WNV) in the near future, as its presence in neighboring countries has been documented, and the high abundance of Culex pipiens, the main vector of this virus, has been documented in Belgium as well. Other mosquito species, such as Anopheles plumbeus, could also play a role in disease transmission. Anopheles plumbeus is a tree hole-breeding species whose habitat is expanding to urban sites, thus increasing its contact with humans. Only limited data are available on the vector competence of this species for arboviruses, let alone WNV. Such knowledge is important with respect to risk assessments and a preparedness plan in case a WNV introduction in Belgium takes place.

METHODS: A vector competence study with field-collected Belgian Anopheles plumbeus mosquitoes for WNV (lineage 1) was performed under different temperature conditions: a constant 25 °C, 25/20 °C, and 25/15 °C day/night temperature gradient.

RESULTS: At 14 days post-blood-feeding, the different temperature conditions did not impact the infection rate, ranging between 24% and 29%, nor the viral load in the gut, indicating a similar level of viral replication. Interestingly, statistically significant differences in virus dissemination from the gut to secondary tissues were observed between the different conditions. At a constant temperature of 25 °C, WNV was detected via quantitative reverse transcription polymerase chain reaction (RT-qPCR) in the saliva of one mosquito, resulting in a transmission efficiency of 1.6%. In contrast, no WNV was detected in the saliva under gradient conditions. WNV could not be isolated from the RT-qPCR positive saliva sample.

CONCLUSIONS: Since no proof could be found of infectious WNV being present in the saliva of Anopheles plumbeus under any temperature condition, this species cannot be considered a competent vector on the basis of our results. As also only a low viral RNA load was detected by RT-qPCR in one saliva sample at the 25 °C condition, we conclude that Anopheles plumbeus will probably play no role in WNV transmission in Belgium, especially under temperature conditions that more closely reflect the current Belgian climate (25/15 °C) or what could occur in the future (25/20 °C) during the vector season.

PMID:41933367 | DOI:10.1186/s13071-026-07346-9

Chin Med. 2026 Apr 3;21(1):109. doi: 10.1186/s13020-026-01371-7.

ABSTRACT

BACKGROUND: Golden bile powder (GBP), an artificial bear bile powder, is used for liver protection and contains taurine-conjugated bile acids (BAs) with broad pharmacological activities. However, its pharmacokinetics and effects on endogenous BA homeostasis are unclear.

METHODS: Sprague-Dawley rats received oral administration of GBP (54 mg/kg/day) combined with three deuterated taurine-conjugated BAs at fixed ratios for 7 days to facilitate separate analysis of changes in exogenous and endogenous BAs following administration. Single deuterated taurine-conjugated BA groups were also included. Blood samples were collected over a 24 h time window on days 1 and 7. We developed and validated a surrogate analyte-based UPLC-MS/MS method to quantify six BAs in rat plasma, eliminating endogenous interference. Pharmacokinetic parameters were obtained by non-compartmental analysis, and gender differences and accumulation effects were assessed using appropriate statistical comparisons.

RESULTS: The UPLC-MS/MS method demonstrated good linearity (r > 0.999), accuracy (89.1%-115%), precision (RSD < 15%), and stability (within ± 15%). Pharmacokinetic studies showed taurine-conjugated BAs in GBP had long half-lives (8.43-12.7 h) and gender-specific accumulation, with females displaying higher systemic exposure. For example, the AUC_{0-24 h} of TCA was approximately 16-fold higher in females than in males. Repeated GBP administration (54 mg/kg/day for 7 days) reshaped systemic BA composition, increasing both exogenous and endogenous BA concentrations, with the latter displaying more pronounced elevations-approximately fivefold higher than the exogenous BA AUC increase. Sex differences were evident, as female rats exhibited enhanced conversion of conjugated BAs to free forms. The BA shifts observed may be related to known enterohepatic circulation and gut microbiota-mediated BA transformation pathways.

CONCLUSIONS: This work establishes an analytical framework for evaluating endogenous and exogenous BA dynamics, contributing to future mechanistic and translational studies involving GBP and its potential applications.

PMID:41933363 | DOI:10.1186/s13020-026-01371-7

Int J Health Geogr. 2026 Apr 3. doi: 10.1186/s12942-026-00467-5. Online ahead of print.

NO ABSTRACT

PMID:41933361 | DOI:10.1186/s12942-026-00467-5

BMC Nurs. 2026 Apr 3. doi: 10.1186/s12912-026-04623-x. Online ahead of print.

ABSTRACT

BACKGROUND: Diabetic foot ulcers (DFUs) are a major cause of morbidity, lower-limb amputation, and mortality among people with diabetes, particularly in low- and middle-income countries. Nurses play a key role in DFU prevention and management; however, evidence on their knowledge, attitudes, and practices (KAP) in Ghana remains limited. This study assessed nurses’ KAP regarding DFU care at a tertiary hospital in Ghana.

METHODS: A hospital-based cross-sectional study was conducted among nurses providing direct patient care from September to November 2025. A structured self-administered online questionnaire assessed socio-demographic characteristics and DFU-related knowledge, attitudes, and practices. Descriptive statistics summarized the data, and chi-square tests examined associations between knowledge levels and selected variables (p < 0.05).

RESULTS: Of the 128 nurses invited, 100 participated (response rate: 78.1%). Most respondents were female (77%), and 90% had not received formal DFU training. Overall, 61% demonstrated good knowledge, 30% moderate knowledge, and 9% poor knowledge. Attitudes toward DFU care were generally positive, though workload constraints were noted. Common practices included patient education (81%), foot inspection (74%), and referral of suspected DFU cases (75%), while use of standardized neuropathy screening tools was low (10%) and documentation of foot-care education inconsistent (52%). Knowledge was significantly associated with academic qualification (χ² = 14.876, p = 0.002), years of practice (χ² = 8.219, p = 0.016), and prior DFU training (χ² = 12.604, p < 0.001).

CONCLUSIONS: Despite positive attitudes toward DFU care, gaps remain in preventive knowledge and evidence-based screening practices. Strengthening structured DFU training and institutional support may improve nursing practice and patient outcomes.

PMID:41933340 | DOI:10.1186/s12912-026-04623-x

Harm Reduct J. 2026 Apr 3. doi: 10.1186/s12954-026-01437-7. Online ahead of print.

ABSTRACT

BACKGROUND: Xylazine prevalence has surged in the unregulated fentanyl supply across the United States. In efforts to inform education initiatives for people who use drugs, this study aimed to identify factors associated with reported xylazine use and knowledge gaps.

METHODS: This Connecticut-based mixed methods study employed both surveys and interviews. Survey participants, recruited from collaborating harm reduction organizations, were adults who used unregulated substances in the last six months. They were asked about their drug use, knowledge of xylazine, service use experience, and demographic information. Purposive sampling of survey participants was then used to select individuals for in-depth interviews. Topic guides were designed to gain a deeper understanding of participants’ xylazine awareness and future learning preferences. Quantitative data were dichotomized based on reported xylazine use and analyzed using descriptive statistics, Chi-square, Fisher’s exact, or t-tests. Simple and multiple logistic regression were used to find correlates of reported use of xylazine. Interviews were analyzed using thematic analysis.

RESULTS: Between August and November 2024, we surveyed 114 respondents. Nearly half reported lifetime xylazine use (49.1%) and almost three-quarters heard of xylazine prior to engaging in the study (71.9%). Multiple logistic regression revealed that unemployment (OR 6.5, 95% CI 2.4-17.8), past-year fentanyl use (OR 41.1, 95% CI 4.8-354.4), and harm reduction service engagement (OR 5.2, 95% CI 1.6-16.8) as predictors of reported xylazine use, after adjustments. We conducted n=31 interviews; thematic analysis identified four major themes: (1) information about xylazine was obtained from many sources, (2) knowledge about xylazine was gained from using xylazine, (3) some misconceptions about xylazine have developed, and (4) multiple mechanisms for xylazine education are desired.

CONCLUSIONS: This study underscores the need for accessible xylazine education to address knowledge and confidence gaps among people who use drugs. Xylazine education should be tailored to one’s likely xylazine exposure. Education must be harm-reduction oriented, stigma-free, and incorporate the voices of people who use drugs.

PMID:41933329 | DOI:10.1186/s12954-026-01437-7

BMC Endocr Disord. 2026 Apr 3. doi: 10.1186/s12902-026-02253-7. Online ahead of print.

ABSTRACT

OBJECTIVE: To systematically evaluate the effect of short-term androgen therapy on final adult height in boys with constitutional delay of growth and puberty (CDGP).

METHODS: Original studies investigating androgen therapy in children with CDGP and reporting final adult height as an outcome were retrieved from PubMed, Embase, Web of Science, and SpringerLink. The search period extended from database inception to September 2025. EndNote 20.0 was used for duplicate removal, and study quality was assessed using the Newcastle-Ottawa Scale (NOS). Literature screening, data extraction, and quality assessment were independently conducted by two researchers, with discrepancies resolved through consultation with a third researcher. Meta-analysis was performed using R 4.5.2 and Review Manager 5.4.1.

RESULTS: A total of 13 eligible retrospective cohort studies involving 803 patients were included. Sensitivity analyses demonstrated good robustness of the pooled results, and Egger’s tests indicated no significant publication bias (P₁ = 0.0794, P₂ = 0.3982). Meta-analysis showed that, compared with untreated controls, androgen therapy-including testosterone and oxandrolone-significantly increased measured final adult height [MD = 1.78 cm, 95% CI (0.47, 3.08), P = 0.0076] and significantly improved final height Z-scores [MD = 0.24, 95% CI (0.07, 0.41), P = 0.0057]. Subgroup analyses revealed that the low-dose regimen yielded the most favorable effect [MD = 1.88 cm, 95% CI (0.63, 3.12), P = 0.003], whereas the medium-dose [MD = 1.17 cm, 95% CI (-0.90, 3.25), P = 0.268] and high-dose regimens [MD = 1.68 cm, 95% CI (-5.07, 8.42), P = 0.626] showed no statistically significant benefit. Short-course therapy was associated with greater improvement in final adult height compared with long-course therapy [MD = 2.70 cm, 95% CI (1.30, 4.09), P < 0.001]. In addition, testosterone demonstrated superior efficacy compared with oxandrolone [MD = 2.64 cm, 95% CI (1.44, 3.80), P < 0.001].

CONCLUSION: Short-term androgen therapy can improve final adult height in boys with CDGP, with low-dose, short-course testosterone regimens appearing to be the most favorable option. Given the limited number and retrospective nature of the included studies, these findings require further confirmation through high-quality comparative studies.

CLINICAL TRIAL NUMBER: Not applicable.

PMID:41933328 | DOI:10.1186/s12902-026-02253-7

BMC Infect Dis. 2026 Apr 3. doi: 10.1186/s12879-026-13236-3. Online ahead of print.

ABSTRACT

BACKGROUND: Chlamydia pneumoniae is a significant pathogen in pediatric community-acquired pneumonia, with increasing incidence globally, particularly in East Asia. However, gender disparities and the role of bronchoscopy in disease management remain underexplored. This study aimed to analyze the clinical features, risk factors, and outcomes of C. pneumoniae pneumonia in children.

METHODS: We conducted a retrospective analysis of 266 children with C. pneumoniae pneumonia admitted to a tertiary maternal and child health hospital from January 2024 to June 2025. Data included age, gender, fever at admission, cough duration, length of stay, bronchoscopy performance, hematological parameters (white blood cell count, neutrophil ratio, lymphocyte ratio), C-reactive protein, procalcitonin, pulmonary involvement, co-infection status, and medication use. Statistical analyses involved t-tests, chi-square tests, and logistic regression.

RESULTS: A significant surge in cases was observed since January 2025. Gender-based analysis showed girls (n = 127) had longer hospitalization (mean difference:7.0, p < 0.05) and cough duration at admission (median value: 7, p < 0.05), with higher co-infection rates (48% vs. 30.9% in boys, n = 139, p < 0.05). Among 102 co-infected cases, rhinovirus was predominant (37.3%, n = 38). Logistic regression identified younger age as an independent risk factor for co-infection (OR 0.91 per year, p < 0.05). Children undergoing bronchoscopy (n = 86) had prolonged hospital stays, lower lymphocyte and monocyte ratios, and higher neutrophil ratios (p < 0.05). Bronchoscopic findings revealed viscous yellowish secretions, which were looser than Mycoplasma pneumoniae-induced plastic bronchitis and effectively managed with lavage. Younger age and lower neutrophil ratios predicted multi-lobar involvement (p < 0.05).

CONCLUSION: C. pneumoniae pneumonia in children exhibits gender-specific severity, with girls showed trends of prolonged hospitalization and cough duration. Younger age increases co-infection risk, and bronchoscopy indicates more severe disease but aids in targeted therapy. These findings underscore the need for early diagnosis and personalized interventions in high-risk groups.

PMID:41933307 | DOI:10.1186/s12879-026-13236-3