Search Results (1,856)

Viral infections pose a major threat to honey bee health. While viruses are typically controlled indirectly through efforts of attaining Varroa resistance, the heritable trait suppressed in ovo virus infection (SOV) provides a direct avenue for selecting virus resistance. This study evaluated the potential of this trait using data collected within an established mass breeding selection program. Drone egg samples collected from honey bee colonies in Flanders (2015–2024) were screened for four viruses to determine the queen’s SOV status. Queens are classified as SOV-positive if no viral particles are detected in their sample, and as SOV-negative if genomic material from at least one of these viruses is present. The proportion of SOV-positive queens significantly increased over time, regardless of maternal background, and targeted breeding from SOV-positive maternal lines enhanced the likelihood of producing SOV-positive offspring. Simultaneously, the prevalence and viral load values of several viruses decreased over time. These findings demonstrate that selective breeding for SOV-positivity can improve virus resistance in managed honey bee populations. There is even a potential to raise the SOV trait occurrence by incorporating targeted mating within selection programs. Therefore, future research should focus on the combined selection for SOV through targeted breeding and mating, alongside Varroa-resistant traits. Full article

Background/Objectives: Pre-hospital delivery is an unpredictable event posing significant challenges for Emergency Medical Services (EMS) teams. Despite advances in perinatal care, emergency deliveries outside the hospital environment remain associated with increased maternal and neonatal risks. This study aimed to identify predictors of out-of-hospital delivery in EMS-attended labor cases and determinants of neonatal condition immediately after delivery. Methods: We conducted a retrospective analysis of 5097 EMS records of laboring women in Poland from August 2021 to January 2022, of which 2927 were included in the final study sample. Multivariate logistic regression models with multiple imputation for missing data were used to identify predictors of pre-hospital delivery and adverse neonatal condition (Apgar ≤ 7) in EMS-managed childbirths. Results: Pre-hospital delivery was strongly associated with second-stage labor (OR ≈ 535; p < 0.0001), ruptured membranes (OR ≈ 8.7; p < 0.0001), and fewer previous pregnancies (OR = 0.86; p = 0.018), and showed a trend with higher maternal heart rate (OR = 1.015; p = 0.083). Neonatal status classified as Apgar ≤ 7 was significantly associated with preterm birth (p < 0.0001), absence of fetal movements (OR ≈ 26.4; p = 0.025), and complications during pregnancy (p = 0.036). Complications during labor and lack of prenatal care were not significantly associated with increased risk of pre-hospital delivery in the model. Conclusions: Rupture of membranes, second-stage labor, and fewer previous pregnancies are significant predictors of pre-hospital delivery in EMS-managed cases. Absence of fetal movements and preterm gestation predict worse neonatal outcomes (Apgar ≤ 7). Early identification of these factors may enhance prehospital perinatal care and improve maternal and neonatal prognosis. Full article

Background: Nutrition during the perinatal period, including pregnancy, childbirth, postpartum, and lactation, is a critical determinant of maternal and neonatal health. While the importance of balanced nutrition is well established, the integration of nutritional counseling into midwifery care remains inconsistent across settings. Evidence suggests that midwives are uniquely positioned to deliver nutrition-related support, yet gaps persist in their formal training and in the availability of structured guidance. These gaps are particularly evident in certain regions, such as Greece, where dedicated national guidelines for perinatal nutrition are lacking. Methods: This systematized narrative review synthesises evidence from studies published between 2010 and 2025, retrieved through PubMed, CINAHL, Scopus, and relevant national guidelines. Although the synthesis draws on diverse study designs to provide contextual depth, randomized controlled trials (RCTs) were prioritized and synthesized separately to evaluate the effectiveness of midwife-led interventions. In total, ten randomized controlled trials were included in the evidence synthesis, alongside additional observational and qualitative studies that informed the narrative analysis. Both international and Greek literature were examined to capture current practices, challenges, and knowledge gaps in the nutritional dimension of midwifery care. Results: Findings indicate that adequate intake of macronutrients and micronutrients, including iron, folic acid, vitamin D, iodine, calcium, and omega-3 fatty acids, is essential for optimal maternal and neonatal outcomes. Despite this, studies consistently report insufficient nutritional knowledge among midwives, limited confidence in providing counseling, and variability in clinical practice. Socio-cultural factors, such as dietary traditions and migration-related challenges, further influence nutritional behaviors and access to guidance. Emerging approaches, including e-health tools, group counseling models, and continuity-of-care frameworks, show promise in enhancing midwives’ capacity to integrate nutrition into perinatal care. Conclusion: Nutrition is a cornerstone of perinatal health, and midwives are strategically placed to address it. However, gaps in training, inconsistent guidelines, and cultural barriers limit the effectiveness of current practices. Strengthening midwifery education in nutrition, developing context-specific tools, and fostering interdisciplinary collaboration are essential steps toward more comprehensive and culturally sensitive perinatal care. Future research should focus on longitudinal and intervention studies that assess the impact of midwife-led nutritional counseling on maternal and neonatal outcomes. Full article

Gestational diabetes mellitus (GDM) is a common metabolic complication of pregnancy associated with significant short- and long-term risks for both mother and offspring. Increasing evidence indicates that genetic susceptibility plays a central role in GDM pathogenesis, particularly through variants affecting insulin secretion and pancreatic β-cell function. This narrative review integrates molecular, clinical, and epidemiological perspectives, highlighting population-specific effects and gene–environment interactions. Improved understanding of the genetic risk architecture may support earlier risk stratification and enable the future development of personalized strategies for GDM prevention and management, with particular emphasis on genetic polymorphisms in SLC30A8, CDKAL1, and HHEX genes consistently implicated in glucose homeostasis and β-cell integrity. These genes contribute to distinct but complementary molecular pathways underlying GDM, including impaired insulin biosynthesis, defective zinc transport within insulin granules, and altered paracrine regulation within pancreatic islets. While associations between these variants and GDM have been repeatedly demonstrated, their clinical relevance and mechanistic impact remain incompletely understood. Available evidence suggests that CDKAL1 represents the strongest genetic determinant, followed by SLC30A8, while HHEX appears to play a modulatory role. This review summarizes current findings on the molecular functions and clinical significance of these polymorphisms, highlighting population-specific effects and gene–environment interactions. Improved understanding of genetic risk architecture may support earlier risk stratification and enable future development of personalized strategies for GDM prevention and management. Full article

Background: The increasing prevalence of low-birth-weight (LBW) offspring from obese mothers underscores the need for dietary strategies to mitigate the transgenerational propagation of metabolic diseases. Objectives: We determined whether dietary protein restriction under obesogenic conditions altered maternal energy balance and led to LBW offspring and whether branched-chain amino acid (BCAA) supplementation improved maternal energy balance and mitigated weight and craniofacial skeletal deficits in offspring. Methods: High-fat-fed obese pregnant Sprague Dawley rats (~8–10 weeks of age, n = 8–11/group) were randomized in study 1 to control high-fat diet (20% protein; HFD), low-protein diet (LP; 5% protein), and LP + BCAA diet (100% BCAA requirements) and in study 2 to control HFD (20% protein), LP (10% protein), and LP + 2BCAA diet (200% BCAA requirements). Post-weaning offspring were fed HFD until 8 weeks of age. Results: Protein restriction promoted hyperphagia and energy expenditure, whereas BCAA supplementation attenuated such hyperphagic effects in pregnancy but not in lactation. Protein restriction reduced maternal body weight in lactation, and although BCAA supplementation did not reverse the weight loss, it enhanced insulin sensitivity and paradoxically reduced offspring survival. Maternal protein restriction reduced offspring body weight and craniofacial bone growth that persisted into adulthood, but BCAA supplementation did not rescue such deficits. Conclusions: Maternal protein restriction in obese dams enhanced maternal energy expenditure but impaired offspring growth and development. Although BCAA supplementation improved maternal energy balance, it was insufficient to reverse the adverse effects of maternal protein restriction on offspring growth under obesogenic conditions. Full article

Background: Presence of milk, fruits, eggs, fish, nuts and wheat antigens in the amniotic fluid is described in the literature. Studies show a contradictory relationship between maternal exposure to allergens and early sensitization of the fetus to allergens. Hemochorionic type of the human placenta allows for easier transfer of nutrients and antibodies from the mother’s blood to the fetal circulation through the direct contact of maternal blood with the fetal chorion. During the third trimester of pregnancy, immunoglobulin G (IgG) is actively transferred through the placenta into the fetal via neonatal FcRN receptor (FcRN). In addition, monomeric immunoglobulin E (IgE) cannot cross the placenta Aim: The objective of our study is to track intrauterine sensitization to essential food proteins at birth in umbilical cord blood in mothers with established peripheral blood eosinophilia and in their infants using allergen-specific IgE and IgG. Methods: An observational study was carried out in a cohort of 22 mothers with eosinophilia and their babies. Differences in expression between groups were assessed. Blood samples were collected to determine serum IgE and IgG specific to a set of inhalant and food allergens. Results: We did not find a significant correlation between specific IgE to cow’s milk (p = 0.857), egg white (p = 0.926) and egg yolk (p = 0.096) in umbilical cord blood and maternal blood samples taken immediately before birth. Spearman’s correlation of the specific IgE and IgG in umbilical cord blood showed no dependence between the two variables. In contrast, statistical analysis showed that maternal eosinophilia in peripheral blood could be a risk factor for the development of allergy in the offspring (χ², p = 0.0347). However, given the small number of patients, this claim needs to be confirmed with further studies. Conclusions: Due to the functional immaturity of the developing immune system of the fetus, the generation and maintenance of an independent immune response to allergens are incomplete. Maternal IgG (specific) passes to the baby and high maternal IG to a specific allergen reduces babies IgE production. In addition, low maternal specific IgG may promote IgE production in the baby under the influence of microenvironmental factors (cytokine background). The main limitation of our study is the small number of patients. Further research is needed in this direction to clarify the mechanisms and risk factors for early sensitization in newborns. Full article

Background: Gestational diabetes mellitus (GDM) is associated with metabolic disturbance and subclinical cardiovascular changes during pregnancy and after birth. Optimal glycaemic control remains challenging for many patients despite existing management strategies. Ursodeoxycholic acid (UDCA) has shown potential metabolic effects, including enhanced insulin sensitivity and anti-inflammatory effects. Previously, we demonstrated that UDCA improves glycaemic control in women achieving higher circulating UDCA concentrations; however, its effect on maternal cardiac function remains unknown. The objective was to evaluate whether treatment with UDCA compared with placebo is associated with differences in maternal cardiac function in pregnancies complicated by GDM. Methods: In this randomized, placebo-controlled trial, 113 women with GDM were recruited, with 56 allocated to UDCA and 57 to placebo (IMIB-GU-2019-02, registration date: 17 June 2020; first participant enrolled: 3 March 2021). After measurement of maternal blood UDCA levels, 43 participants in the treatment group with levels ≥ 0.5 μmol/L were included in a per-protocol analysis. Participants had cardiac assessments at baseline, in the late third trimester (36 weeks) and postpartum. Detailed left ventricular systolic and diastolic functional indices were assessed using conventional pulse and tissue Doppler indices as well as strain imaging. Right ventricular systolic function was also assessed. Results: Baseline maternal characteristics and cardiac functional indices were comparable between the UDCA and placebo groups. In the third trimester, women treated with UDCA showed more negative left atrial strain during atrial contraction (LASct_AC) compared with placebo (p = 0.016), while no significant between-group differences were observed in conventional left ventricular systolic or diastolic parameters. In the postpartum period, UDCA treatment was associated with higher left atrial reservoir function, reflected by increased LASr_ED (p = 0.041) and LASr_AC (p = 0.036), as well as more negative left atrial conduit strain at end-diastole (LAScd_ED; p = 0.043). No consistent differences were observed in left ventricular systolic function, haemodynamic indices, or right ventricular functional parameters between the two groups. Conclusions: These findings are associated with small and time-dependent differences in reducing atrial dysfunction and improving cardiac efficiency during late pregnancy and postpartum. However, given the lack of long-term follow-up, further research is needed to determine the long-term cardiovascular relevance of UDCA in this population. Full article

Background: Postnatal growth failure in very preterm infants remains a major concern in neonatal care and clinical management is complicated by the lack of a standardized definition. This study aims to identify risk factors for growth faltering (GF) and undernutrition (UN) at hospital discharge, defined according to the latest consensus definitions established by the European Society for Paediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN). Methods: We conducted a retrospective observational study of 416 preterm infants (gestational age < 32 weeks and/or birth weight < 1500 g). Growth was monitored using the Intergrowth 21st standards. In line with ESPGHAN criteria, GF was defined longitudinally as a weight for age (WFA) z-score decline ≥ 1 SD from birth, while UN was defined cross-sectionally as a WFA or length for age z-score < −2 SD at discharge. Logistic regression models were used to determine independent predictors for both growth phenotypes. Results: At discharge, the prevalence of GF and UN was 45.3% and 33.1%, respectively. In infants born without growth restriction (GR), UN was almost entirely driven by GF (89.7%). In contrast, 85.5% of infants born with GR remained undernourished at discharge. Multivariate analysis identified bronchopulmonary dysplasia and higher maximal postnatal weight loss as major independent risk factors for GF, while female sex and human milk feeding at discharge were associated with a lower risk of GF. For infants born with adequate weight, maternal hypertension, extremely low birth weight, and the co-occurrence of GF were the strongest predictors of UN. Conclusions: Nearly half of very preterm infants experience significant growth impairment before discharge. By assessing the dynamic process of GF and the static endpoint of UN, we identified distinct clinical trajectories. Standardized ESPGHAN criteria allow for the identification of high-risk “phenotypes”—particularly those with GR at birth or severe neonatal morbidity—enabling more targeted and intensive nutritional management during the critical developmental window. Full article

Cumulus cells (CCs) are a distinct population of granulosa cells (GCs) that surround the developing and ovulated mammalian oocyte. The features of their structural organization and the expression pattern of key genes significantly affect oocyte viability. Changes in the functional activity of the nucleus are often expressed in changes in the structure of nuclear bodies (NBs), including Cajal bodies (CBs). The diagnostic protein of CBs is coilin, which maintains their structural integrity. Using fluorescent and electron microscopy, we examined maternal aging-associated changes in coilin pattern in mouse CCs. We found that older mice had a decrease in the number of coilin-positive bodies, while external transcriptome data analysis revealed no significant changes in Coil and Smn1 gene expression. We hypothesized that the age-related dynamics of coilin-containing bodies are determined not by changes in the expression level of key components of these bodies, but by age-related changes in CC metabolism. Considering that CCs are a by-product of IVF protocols, making them available for analysis in sufficient quantities, age-related changes in the number and size of coilin-positive NBs in CCs may serve as a promising biomarker for assessing ovarian functional aging. Full article

Background: Varroa destructor is the major threat to honey bee health, and selective breeding for resistance traits such as Varroa-sensitive hygiene represents a promising long-term strategy for controlling mite populations. However, breeding programs that rely on highly controlled mating schemes, including single-drone instrumental insemination, may reduce allelic diversity at the complementary sex determiner (csd) locus, potentially increasing the production of non-viable diploid males and compromising colony fitness. Methods: To evaluate whether csd diversity can be maintained under these conditions, we characterized the hypervariable region of csd in a selectively bred Apis mellifera population subjected to four years of selection. Using a validated de novo assembly pipeline, we reconstructed 43 amino-acid sequences from 33 diploid worker pupae sampled across 13 colonies. Results: Seven distinct alleles were identified, five of which were shared among multiple colonies and corresponded to variants already described in the literature, while two were private to individual colonies and novel in the literature. Colony-level frequency data revealed a moderate diversity: the most common allele was detected in nine colonies, with an allelic frequency of 31%. Moreover, the expected heterozygosity of the population was estimated at 0.79. Conclusions: Overall, these findings show that csd diversity can be partially maintained even under strong selective pressure when multiple maternal lines are retained, and they underscore the importance of incorporating genetic information into breeding decisions to support the long-term sustainability of selective breeding programs. Full article

Background/Objectives: Birth preparedness and complication readiness (BPCR) is a cornerstone of maternal health strategies designed to minimize the “three delays” in seeking, reaching, and receiving skilled care. In Ethiopia, uptake of BPCR remains insufficient, and little evidence exists on how individual- and community-level factors interact to shape preparedness. This study assessed the determinants of BPCR among women of reproductive age in Hawela Lida district, Sidama Region. Methods: A community-based cross-sectional study was conducted among 3540 women using a multistage sampling technique. Data were analyzed with multilevel mixed-effect negative binomial regression to account for clustering at the community level. Adjusted prevalence ratios (APRs) with 95% confidence intervals (CIs) were reported to identify determinants of BPCR. Model fitness was assessed using Akaike’s Information Criterion (AIC), the Bayesian Information Criterion (BIC), and log-likelihood statistics. Results: At the individual level, women employed in government positions had over three times higher expected BPCR scores compared with farmers (AIRR = 3.11; 95% CI: 1.89–5.77). Women with planned pregnancies demonstrated higher BPCR preparedness (AIRR = 1.66; 95% CI: 1.15–3.22), as did those who participated in model family training (AIRR = 2.53; 95% CI: 1.76–4.99) and women exercising decision-making autonomy (AIRR = 2.34; 95% CI: 1.97–5.93). At the community level, residing in urban areas (AIRR = 2.78; 95% CI: 1.81–4.77) and in communities with higher women’s literacy (AIRR = 4.92; 95% CI: 2.32–8.48) was associated with higher expected BPCR scores. These findings indicate that both personal empowerment and supportive community contexts play pivotal roles in enhancing maternal birth preparedness and readiness for potential complications. Random-effects analysis showed that 19.4% of the variance in BPCR was attributable to kebele-level clustering (ICC = 0.194). The final multilevel model demonstrated superior fit (AIC = 2915.15, BIC = 3003.33, log-likelihood = −1402.44). Conclusions: Both individual- and community-level factors strongly influence BPCR practice in southern Ethiopia. Interventions should prioritize women’s empowerment and pregnancy planning, scale-up of model family training, and address structural barriers such as rural access and community literacy gaps. Targeted, multilevel strategies are essential to accelerate progress toward improving maternal preparedness and reducing maternal morbidity and mortality. Full article

The skin of bats hosts diverse microbial communities, yet most research has focused on bacteria or single fungal pathogens such as Pseudogymnoascus destructans. Here, we present the first direct comparison of culturable skin mycobiota in the greater mouse-eared bat (Myotis myotis) between hibernation and the reproductive season. Swabs collected from hibernating bats in the Nietoperek reserve and from maternity colonies in Lipy yielded 41 fungal species, including 27 that represent new records for M. myotis. Winter assemblages were less diverse but strongly dominated by Penicillium (>90% of isolates), while summer maternity roosts supported broader communities shaped by environmental exposure and plant-associated fungi. Despite seasonal turnover, a small set of taxa, including Aspergillus fumigatus, Mucor fragilis, and Pseudogymnoascus pannorum, persisted across both seasons, indicating the presence of a limited core mycobiota. Richness was higher on wing membranes than on tail membranes, whereas biometric variables such as sex, age, body mass, and forearm length showed only weak and inconsistent associations with fungal diversity. These findings demonstrate that seasonal filtering is likely one of the main factors determining the skin mycobiota in M. myotis. Additionally, we expand the known fungal diversity of this species, and emphasize its role as a reservoir of environmental, opportunistic, and pathogenic fungi. Full article

Background/Objectives: Southeastern Europe and Croatia have served as a genetic crossroads between the Near East and Europe since prehistoric times, shaped by numerous and repeated migrations. By integrating 19 newly generated ancient genomes with 285 previously published ancient genomes from Croatia, we investigated patterns of maternal and paternal landscapes from the Neolithic, Bronze, and Iron Ages through to the Antiquity and medieval periods, as well as the modern Croatian population. Methods: Ancient DNA extraction from human remains and library preparation were conducted in dedicated clean-room facilities, followed by high-throughput sequencing on the Illumina platform. Sequencing data were analyzed with established pipelines to determine mitochondrial and Y-chromosomal haplogroups and the genetic sex of individuals. Results: New ancient data reveal a predominantly European maternal profile, dominated by haplogroups H, U, and HV0, whereas Y-chromosomal lineages are characterized by J subclades and R1a, with limited representation of R1b and the absence of I2a. When combined with published ancient Croatian genomes, the results reveal similar haplogroup diversity and patterns, as well as the expansion of mtDNA haplogroup H over time and a substantial increase in Y-chromosome R1a and I2a haplogroup frequency from the prehistoric to the modern period. Conclusions: Although the analyzed samples are heterogeneous and originate from different historical periods, their genetic signatures conform to the broader patterns expected for the region. In a wider context, the ancient Croatian mitochondrial data reveal stronger genetic persistence from prehistory to modern times, unlike paternal lineages, which show significantly higher divergence. Full article

Background: Maternal health behaviors during pregnancy are crucial for maternal and fetal outcomes. While global research has explored that demographic, clinical, and psychosocial determinants significantly influence these behaviors, evidence from low- and middle-income countries (LMICs), including Albania, remains limited. This study aims to evaluate psychosocial perceptions and health behaviors related to lifestyle among pregnant women in a local Albanian community in order to identify which are higher risk subgroups that need targeted and tailored antenatal care interventions. Methods: This multicenter cross-sectional study included 200 pregnant women attending antenatal clinics from May to August 2024 in Vlora city, Albania. Participants were selected using consecutive sampling based on inclusion criteria. Data were collected through a validated questionnaire composed of five sections: demographic/obstetric data; maternal health behaviors; dietary diversity; physical activity, perceived stress; and social support. Clinical and anthropometric measurements were assessed by trained health professionals during antenatal visits. SPSS version 23.0 and binary logistic regression with p-value ≤ 0.05 statistically significant were used for data analysis. Results: Mean age was 28.3 ± 6.4 years, 71% employed and 83.5% urban residents. Key unhealthy behaviors included tobacco use (25.5%), alcohol consumption (10.5%), exposure to toxins (15%), and low dietary diversity (32%). We found significant correlations between low dietary diversity and rural residence (Adj OR = 2.48), hypertension (Adj OR = 6.88), and overweight/obesity (Adj OR = 2.33). Tobacco use was associated with unemployment and alcohol use with unemployment and hypertension variables. Low/moderate social support and high perceived stress were significantly related with multiple unhealthy behaviors, such as low dietary diversity, inadequate physical activity and antenatal care. Conclusions: Unhealthy nutritional behaviors, tobacco and alcohol use and low physical activity are more prevalent risk factors among pregnant women in Vlora city. Priority should be given to vulnerable groups, including rural residents, pregnant women with low social support, high perceived stress and those with hypertension and obesity. Interventions that integrate psychosocial support and health education into antenatal care services are urgently needed to enhance pregnancy outcomes in Albanian communities. Full article

Background: Menstrual hygiene management (MHM) is a vital aspect of adolescent girls’ health and well-being. However, in many Gulf countries, including Saudi Arabia, this issue has received less attention because of cultural taboos, misconceptions, and a lack of knowledge about factors affecting menstrual hygiene practices. Thus, it is crucial to promote adolescent health and develop effective school-based interventions. Aim of the Study: Our aim was to assess menstrual hygiene practices and their determinants among adolescent girls in secondary schools in Bisha, Saudi Arabia. Methods: A cross-sectional descriptive approach was used to study 320 female secondary school students in Bisha City, southwestern Saudi Arabia. Sample: The subjects were selected by using a stratified random sampling procedure. Information was obtained using a previously validated and culturally sensitive self-administered questionnaire on knowledge and menstrual hygiene. Descriptive statistics, chi-square tests, and binary logistic regression analyses were conducted to determine factors associated with good menstrual hygiene practices. Results: A total of 320 adolescent girls participated, of whom 53.8% demonstrated good menstrual hygiene practices. In the multivariable analysis, independent predictors of good practices were increased age (AOR = 2.69, 95% CI:1.59–4.56), urban residency (AOR = 2.62, 95% CI: 1.46–4.69), and good menstrual knowledge (AOR = 2.13, 95%CI: 1.24–3.67). Maternal primary education (AOR = 8.033, CI: 1.44–44.99) and maternal employment in the government sector (AOR = 7.346, CI: 2.29–23.54) also showed strong positive associations with good menstrual hygiene practices. Conversely, experiencing menarche after age 12 was associated with lower odds of good menstrual hygiene (AOR = 0.49). Conclusions: Although a good proportion of girls practiced adequate menstrual hygiene, major knowledge and behavior gaps persist. Providing strong menstrual education in schools and through community-based efforts is critical for supporting the health of adolescent girls and promoting menstrual equity in Saudi Arabia. Full article