Biomedicine hub最新文献

Introduction: Invasive pneumococcal disease is a major cause of morbidity and mortality in infectious diseases. Selective reporting of antibiotic susceptibility test results might lead to a tailored antibiotic therapy and could therefore be an important antibiotic stewardship program intervention. The aim of this study was to analyse whether a switch to selective reporting of antibiotic test results leads to a more focused antibiotic therapy in patients with a bloodstream infection with Streptococcus pneumoniae.

Methods: This study was performed as a retrospective cohort study at the University Hospital Regensburg, Germany. All blood cultures positive for Streptococcus pneumoniae between 2006 and 2021 were analysed. In 2014, a switch to selective reporting of antibiotic susceptibility test results omitting sensitivity results for agents not recommended was introduced.

Results: Twenty-four hours after final antibiotic susceptibility test results were available, 20.9% before (BI) versus 15.4% after implementation (AI) of selective reporting of antibiotic test results received a narrow-spectrum penicillin, while only 2.3% BI versus 5.8% AI received a narrow-spectrum penicillin from the beginning.

Conclusion: Selective reporting of antibiotic susceptibility test results without further antimicrobial stewardship interventions did not lead to a higher use of a narrow-spectrum penicillin in this study.

Introduction: The Flemish version of the Triage Risk Screening Tool (fTRST), derived from the Triage Risk Screening Tool for assessing risk of readmission to the emergency department, is increasingly used as a simple screening tool in oncology. This study aimed to evaluate the utility of the fTRST in the context of elective surgical treatment for urologic cancer patients.

Methods: We included 886 patients who underwent major urologic cancer surgery at our institution between 2020 and 2022 and underwent preoperative screening, including fTRST. We set the fTRST cutoff at 2 and used propensity score matching and multivariate regression analysis to assess how fTRST affected two postoperative outcomes: ambulation failure and delirium.

Results: Of the 886 patients, 693 (78%) had an fTRST score <2, and 193 (22%) had an fTRST score ≥2 (high likelihood of frailty). After matching the groups by propensity scores, we compared the outcomes of 131 patients in each group. We found that the group with fTRST ≥2 had significantly higher rates of ambulation failure (15 vs. 11%, p = 0.03) and delirium (16 vs. 11%, p = 0.008) than the group with fTRST <2. Multivariate logistic regression analysis showed that fTRST score ≥2 was an independent risk factor for postoperative ambulation failure (odds ratio [OR] = 4.05, p = 0.02), along with age ≥75 years (OR = 6.62, p = 0.02), preoperative benzodiazepine medications (OR = 5.12, p = 0.01), and receiving radical cystectomy (OR = 9.30, p = 0.02). Similarly, for delirium, fTRST score ≥2 was an independent risk factor (OR = 2.88, p = 0.03), along with preoperative benzodiazepine medications (OR = 4.38, p = 0.002).

Conclusion: The fTRST might be a screening tool with great potential for identifying patients at high risk for unfavorable postoperative outcomes in elective urologic cancer surgery.

Introduction: Human cathelicidin LL-37 is a salivary antimicrobial peptide (AMP) with broad-spectrum activity against oral diseases, but few studies have assessed its role in children and adolescents living with HIV (CALHIV). We assessed salivary LL-37 levels and correlates in a long-term cohort of Kenyan CALHIV followed since antiretroviral therapy (ART) initiation.

Methods: Saliva was collected from 76 CALHIV who were recruited from two ongoing pediatric HIV studies in Nairobi, Kenya. Oral examinations documenting oral manifestations of HIV, dental caries, and gingivitis were completed. Additional variables included age, sex, HIV treatment (initial ART regimen) and disease parameters, caregivers' demographics, and oral pathologies were conducted. Data were statistically analyzed using the independent T test on the log-transformed LL-37.

Results: At the oral exam visit, the mean age of participants was 13.3 years (±SD = 3.4), and the median CD4 count was 954 cells/mm³. Mean salivary cathelicidin values of the cohort were 23.7 ± 21.1 ng/mL. Children with permanent dentition at time of oral examination, and children who initiated ART at ≥2 years old had higher mean LL-37 concentrations compared to those with mixed dentition and those who initiated ART <2 years old (p = 0.0042, 0.0373, respectively). LL-37 levels were not found to differ by initial type of ART regimen, CD4 count, or oral disease.

Conclusion: Further research and longitudinal studies are necessary to evaluate and improve the innate immunity of CALHIV in Kenya.

Introduction: Airflow obstruction (AO) is evidenced by reduced forced expiratory volume in 1 s/forced vital capacity (FEV1/FVC) with the threshold for diagnosis often being set at <0.7. However, currently the ATS/ERS standards for interpretation of lung function tests recommend the lower limit of normal (LLN), calculated by reference equations of the Global Lung Initiative from 2012 (GLI-12), as a threshold for AO diagnosis. The present study aims to investigate phenotypes, with focus on hyperinflation, which influence AO prevalence defined by FEV1/FVC < LLN when compared to the fixed 0.7 threshold.

Methods: Data from 3,875 lung function tests (56.4% men, aged 18-95) including 3,824 body plethysmography recordings performed from July 2021 to June 2022 were analysed. The difference between both classifiers was quantified, before and after stratification by sex, age, and hyperinflation.

Results: AO diagnosis was significantly less frequent with the LLN threshold (18.2%) compared to the fixed threshold (28.0%) (p < 0.001) with discordance rate of 10.5%. In the presence of mild or moderate hyperinflation, there was substantial agreement (Cohen's kappa: 0.616, 0.718) between the classifiers compared to near perfect agreement in the presence of severe hyperinflation (Cohen's kappa: 0.896). In addition, subgroup analysis after stratification for sex, age, and hyperinflation showed significant differences between both classifiers.

Conclusion: The importance of using the LLN threshold instead of the fixed 0.7 threshold for the diagnosis of AO is highlighted. When using the fixed threshold AO, misdiagnosis was more common in the presence of mild to moderate hyperinflation.

Introduction: Ultrasonography (USG) can be used in neonates to manipulate and place the umbilical catheter in the correct position. Although chest radiograph (CXR) is the gold standard, a noninvasive method like USG without radiation exposure may be an alternative bedside armamentarium to the clinician. The purpose of the study was to evaluate whether USG-guided umbilical venous catheter (UVC) insertion is superior to the conventional method for the successful insertion of UVC.

Method: The neonates born between 25 and 42 weeks of gestation requiring parenteral fluids and admission to neonatal intensive care unit (NICU) between September 2020 and November 2022 were randomized in two weight-based strata: ≤1,200 and >1,200 g. USG-guided UVC insertion was done in the intervention group and blind UVC insertion was done in the control group.

Results: Out of 112 enrolled neonates, 58 were in the USG-guided group and 54 in the blind group. There was no significant difference in the failure rate between the intervention and control groups (20% versus 29% [RR: 0.69, 95% CI: 0.36-1.33]). The sensitivity and specificity of USG in locating tip position were 97 and 46.8%, respectively. The mean procedure time in USG and blind groups was 8.9 and 8.3 min, respectively (p value 0.56).

Conclusion: USG does not reduce the failure rates during the insertion of umbilical catheters. However, being a safe, noninvasive procedure, it can be considered a rescue modality to CXR in NICUs equipped with portable USG for guiding UVC insertion.

Background: Menopause in women marks the knot of reproductive life, and menopause is defined as the last menstrual period in a woman, but this is caused by the failure of the ovarian reserve. The average age of natural menopause in the general population of women has remained around 50-52 years. Premature ovarian insufficiency (POI) is a debilitating clinical syndrome that manifests as a decline in ovarian function in women under 40. This condition is a prominent cause of female infertility.

Summary: POI is a debilitating condition that not only wreaks havoc on patients' physical and mental well-being but also imposes substantial mental, psychological, and economic burdens, particularly on women. In addition to diminished fertility, individuals afflicted with POI face an elevated risk of developing debilitating conditions such as osteoporosis and cardiovascular disease. The etiologies of POI are highly heterogeneous, and it can be caused by spontaneous genetic defects or induced by autoimmune diseases, infections, and iatrogenic or environmental factors. Alarmingly, idiopathic POI, a subtype characterized by an unknown etiology, accounts for more than half of all POI cases. Currently, clinical interventions for POI primarily consist of hormone replacement therapy. Fertility preservation methods are cryopreservation of embryos, oocytes, and ovarian tissue. Immunological interventions, gene editing techniques, and stem cell-based therapies are being explored to unravel the diverse etiologies and underlying mechanisms of POI, thereby enabling the identification of optimal therapeutic interventions. These innovative approaches offer unprecedented opportunities to advance the field of reproductive medicine.

Key messages: The main aim of this paper was to offer a succinct summary of the latest research breakthroughs concerning the elucidation of the mechanisms governing the origin and management of POI.