Visibility and availability of single cigarettes around schools in four Latin American countries.

INTRODUCTION: Single cigarette sales at tobacco-selling points of sale (POS) may promote smoking. We explored visibility and availability of single cigarettes in POS around schools in Argentina, Guatemala, Mexico and Peru, countries where their sale is banned. METHODS: Between April and July 2023, an observational study was conducted at POS around high schools in urban and rural areas in Argentina, Guatemala, Mexico and Peru. A sampling frame of schools was generated from public registries, with schools categorised according to their socioeconomic status and randomly selected within socioeconomic strata. A total of 2081 POS were surveyed based on their proximity to these randomly selected schools. Data were collected on the visibility of single cigarettes (any cigarette sticks or open cigarette packs on display and able to be seen by customers were coded as visible) and their availability (ie, whether singles were sold, whether visible or not). RESULTS: Single cigarettes were visible in 37.2% of POS and available in most (84.9%), with neighbourhood stores the primary source. In most (84.1%) POS with visible single cigarettes, they were displayed near candy or toys. Prices of the cheapest single cigarette sticks ranged from US$0.03 in Argentina to US$0.13 in Guatemala. CONCLUSION: The findings indicate widespread availability of single cigarettes in four Latin American countries where their sale is banned. The low price of single cigarettes, and their proximity to candy/toys, may increase the appeal of smoking to youth. Stricter enforcement of bans on single cigarettes, which may serve as a gateway to experimentation and continued smoking, is needed.

Responding to COVID-19: an exploration of EU country responses and directions for further research.

BACKGROUND: During COVID-19, scientists advising policymakers were forced to deal with high uncertainty and risks in an environment of unknowns. Evidence on which policies and measures were effective in responding to the pandemic remains underdeveloped to answer the key question 'what worked and why?'. This study aims to provide a basis for studies to go further to answer this critical question, by starting to look efficacy or how countries ensured that health services remained available and what measures were enacted to protect and treat their populations and workers. METHODS: We applied a three-phase sequential mixed methods design. In phase one, we started with a qualitative content analysis of the EU Country Profile reports to retrieve and analyse data on COVID-19 responses taken by 29 countries in the European region. Phase two is the step of data transformation, converting qualitative data into numerical codes that can be statistically analysed, which are then used in a quantitative cross-national comparative analysis that comprises phase three. The quantifying process resulted in a numerical indicator to measure the 'response efficacy' of the 29 countries, which is used in phase three's association of the response measure with country performance indicators that were derived from European Centre for Disease Control (ECDC) COVID-19 case and death rate data. RESULTS: Through comparing the frequency of COVID-19 measures taken, we found that many countries in the European region undertook similar actions but with differing effects. The cross-national analysis revealed an expected relationship: a lower COVID-19 response efficacy appeared to be related to a higher case and death rates. Still, marked variation for countries with similar response efficacy indicators was found, signalling that the combination and sequence of implementation of COVID-19 responses is possibly just as important as their efficacy in terms of which response measures were implemented. CONCLUSIONS: Many European countries employed similar COVID-19 measures but still had a wide variation in their case and death rates. To unravel the question 'what worked and why?', we suggest directions from which more refined research can be designed that will eventually contribute to mitigate the impact of future pandemics and to be better prepared for their economic and human burden.

Feasibility of increasing calcium content of drinking tap water following quality regulations to improve calcium intake at population level.

Background: Calcium intake is below recommendations in several parts of the world. Improving calcium intake has benefits not only for bone health but also helps to prevent pregnancy hypertension disorders. Calcium concentration of tap water is usually low The aim of the present study was to determine the maximum amount of calcium that can be added to tap water while complying with drinking water Argentine regulations. Methods: Tap water samples were collected from the Province of Buenos Aires (Argentina). Physicochemical properties and saturation index were measured. Different incremental concentrations of calcium chloride were added to the experimental aliquots. Results: Baseline water had a mean calcium concentration of 22.00 ± 2.54 mg/L, water hardness of 89.9 ± 6.4 mg/L CaCO 3, and a saturation index of -1.50 ± 0.11. After the addition of 0.4554 ± 0.0071 g of salt, water hard-ness reached 355.0 ± 7.1 mg/L CaCO 3, a calcium concentration of 140.50 ± 2.12 mg/L, and a saturation index -0.53 ± 0.02. Conclusions: This study shows that at laboratory level it is feasible to increase calcium concentration of drinking water by adding calcium chloride while complying with national standards. Calcium concentration of drinking tap water could be evaluated and minimum calcium concentration of tap water regulated so as to improve calcium intake in populations with low calcium intake.

Evaluating the Clinical Effectiveness of Cardiac Rehabilitation among Patients of Very Low Socioeconomic Status Living in Colombia.

Cardiovascular disease (CVD) poses a significant health burden, particularly among individuals of low socioeconomic status (SES) in low- and middle-income countries (LMICs). This study evaluates the clinical effectiveness of cardiac rehabilitation (CR) in addressing CVD outcomes among very low-SES patients in Colombia. Data from participants enrolled in a CR program in Colombia between 2022 and 2023 were analyzed retrospectively. Measures included heart-healthy behaviors, physical/psychological outcomes, and quality of life assessed at 18, 36, and 60 sessions. Significant improvements were observed in exercise capacity, psychological well-being, and quality of life metrics throughout the CR program. However, barriers to CR attendance and the critical need for expanded program availability remain evident, particularly in LMIC settings like Colombia. In conclusion, structured CR programs demonstrate substantial benefits for very low-SES individuals in a LMIC country, highlighting the urgent need for increased program accessibility and equitable healthcare provision to optimize cardiovascular health outcomes.

Heart Failure Care Facilitators and Barriers in Rural Haiti: A Qualitative Study.

Background: Heart failure (HF) is a leading cause of hospitalizations in Haiti. However, few patients return for outpatient care. The factors contributing to chronic HF care access are poorly understood. Objective: The purpose of this study is to investigate the facilitators and barriers to accessing care for chronic HF from the patients' perspectives. Methods: We conducted a qualitative descriptive study of 13 patients with HF participating in three group interviews and one individual interview. We recruited patients after discharge from a nongovernmental organization-supported academic hospital in rural Haiti. We employed thematic analysis using emergent coding and categorized themes using the socioecological model. Findings: Facilitators of chronic care included participants' knowledge about the importance of treatment for HF and engagement with health systems to manage symptoms. Social support networks helped participants access clinics. Participants reported low cost of care at this subsidized hospital, good medication accessibility, and trust in the healthcare system. Participants expressedstrong spiritual beliefs, with the view that the healthcare system is an extension of God's influence. Barriers to chronic care included misconceptions about the importance of adherence to medications when symptoms improve and remembering follow-up appointments. Unexpectedly, participants believed they should take their HF medications with food and that food insecurity resulted in missed doses. Lack of social support networks limited clinic access. The nonhealthcare costs associated with clinic visits were prohibitive for many participants. Participants expressed low satisfaction regarding the clinic experience. A barrier to healthcare was the belief that heart disease caused by mystical and supernatural spirits is incurable. Conclusions: We identified several facilitators and barriers to chronic HF care with meaningful implications for HF management in rural Haiti. Future interventions to improve chronic HF care should emphasize addressing misconceptions about HF management and fostering patient support systems for visit and medication adherence. Leveraging local spiritual beliefs may also promote care engagement.

Health inequalities in a middle-income country: a systematic review of the Costa Rican case.

Objective: This study systematically reviews evidence of socioeconomic health disparities in Costa Rica, a middle-income country, to elucidate the relationship between socioeconomic status and health outcomes. Methods: Published studies were identified through a systematic review of PubMed (English) and Scielo (Spanish) databases from December 2023 to January 2024, following PRISMA guidelines. Search terms included socioeconomic status, social determinants, social gradient in health, and health inequalities. Results: Of 236 identified references, 55 met the inclusion criteria. Findings were categorized into health inequalities in mortality (among the general population, infants, and older adults), life expectancy, cause-specific mortality, and health determinants or risk factors mediating the association between the social environment and health. The studies indicate higher mortality among the most disadvantaged groups, including deaths from respiratory diseases, violence, and infections. Higher socioeconomic status was associated with lower mortality rates in the 1990s, indicating a positive social gradient in health (RII = 1.3, CI [1.1-1.5]). Disparities were less pronounced among older adults. Urban areas exhibited concentrated wealth and increased risky behaviors, while rural areas, despite greater socioeconomic deprivation, showed a lower prevalence of risky behaviors. Regarding smoking, people living in rural areas smoked significantly less than those in urban areas (7% vs. 10%). Despite the relatively equitable distribution of public primary healthcare, disparities persisted in the timely diagnosis and treatment of chronic diseases. Cancer survival rates post-diagnosis were positively correlated with the wealth of districts (1.23 [1.12-1.35] for all cancers combined). Conclusion: The study highlights the existence of social health inequalities in Costa Rica. However, despite being one of the most unequal OECD countries, Costa Rica shows relatively modest social gradients in health compared to other middle and high-income nations. This phenomenon can be attributed to distinctive social patterns in health behaviors and the equalizing influence of the universal healthcare system.

Tobacco industry pricing strategies during recent tax adjustments in Mexico: evidence from sales data.

INTRODUCTION: Previous studies have identified pricing strategies that the tobacco industry employs to try to minimise the impact of tobacco taxation, but these studies are mostly about high-income countries. This research examines industry price responses to a recent cigarette tax increase in Mexico, including in the capsule cigarette segment that has expanded rapidly in Latin America. METHODS: Data of cigarette prices and sales in Mexico between October 2018 and September 2021 licensed from NielsenIQ were used following a quasi-experimental design to analyse price changes after excise tax increases with fixed effect models by product. To explore heterogeneous responses, estimates were disaggregated by cigarette attributes such as presence of capsules and market segment. Differential shifting was also assessed. RESULTS: Increasing the tobacco tax from 2011MX$0.35(≈US$0.02) to 2020 MX$0.4944(≈US$0.0283) in January 2020 was associated with an overall 8% cigarette price increase in real terms. However, some cigarette types, including premium to discount segments, exhibited price increases larger than the tax increase, which reduced the relative price of ultra-low-priced cigarettes. Instead of a single hike, prices were gradually raised throughout the first months of 2020 for all cigarette types. A combination of both pricing strategies was employed for capsule cigarettes. The 2021 smaller tax adjustment for annual inflation was fully passed onto consumer, maintaining real prices constant. CONCLUSIONS: The industry's ability to raise prices more than the tax increase and manage these price increases smoothly suggests that there was room for larger tobacco tax increases in Mexico. Future developments on tobacco taxes could consider a fully specific tax structure or minimum taxes to mitigate the adverse effects of market segmentation and differential shifting.

Carboplatin desensitization in the era of target therapies: still worthwhile?

PURPOSE: Unresectable pediatric low-grade gliomas (LGG) usually need adjuvant therapy, and carboplatin hypersensitivity reaction (HR) commonly leads to premature treatment cessation of a standard chemotherapy regimen. In the molecular era, advances in understanding tumor genetic characteristics allowed the development of targeted therapies for this group of tumors; however, cost-effectiveness assessment of treatments, especially in low-income countries, is crucial. The aim is to describe the results of carboplatin desensitization protocol in a single center in a middle-income country. METHOD: Prospective analysis of children with LGG submitted to carboplatin desensitization from December 2017 to June 2020 with follow-up until April 2024. RESULTS: Nine patients were included. The mean age was 11 years. Five patients were male. Seven had optic pathway and two cervicomedullary location. Six had histologic diagnosis and four molecular analyses. The incidence of carboplatin reactions during the study period was 39.1%. Six patients underwent skin prick test, three with positive results. The first HR occurred, on average, around the 9th cycle of treatment. All patients had cutaneous symptoms, and five out of nine had anaphylaxis as the first reaction. 77.7% of the patients completed the protocol, and the clinical benefit rate (stable disease and partial response) was 88.8%. Six patients further required other lines of therapy. Monthly, the total cost for carboplatin was $409.09, and for target therapies (dabrafenib plus trametinib), $4929.28 to $5548.57. CONCLUSION: Our study presented an interesting and cost-effective option where desensitization allowed children with HR to be treated with first-line therapy, avoiding the discontinuation of an effective treatment.

Early versus Delayed Surgical Management of Ruptured Arteriovenous Brain Malformations in a Tertiary Referral Center in Colombia, South America.

BACKGROUND: Surgical timing after rupture of brain arteriovenous malformations (AVMs) is controversial. There is scarce literature on AVM surgical outcomes from developing countries. This study aims to determine if there is a difference between early and delayed surgical resection for patients with ruptured brain AVMs. METHODS: This single-center retrospective review included patients who underwent surgical resection for ruptured brain AVMs in Colombia. Patients were stratified by the timing of surgical intervention relative to the rupture into early (≤72 hours of bleeding) and delayed (>72 hours) resection. Continuous variables were analyzed using an independent t-test, and dichotomous variables were analyzed using a χ2 test. A linear regression analysis was performed with the final mRankin score at 2 years as the dependent variable; P < 0.05 was considered significant. RESULTS: Thirty-one patients were identified. The early treatment group included 14 (45.2%) patients, and the delayed group included 17 (54.8%) patients. The mean (SD) length of time between AVM rupture and surgical resection was 1.6 ± 1.2 days and 12.4 ± 8.4 days, respectively (P < 0.001). There were no differences regarding demographics, perioperative variables, and postoperative outcomes between groups. In the linear regression analysis, the only variable that had a significant association with the final mRankin score was the initial Glasgow Coma Scale, which had a ß coefficient of -0.6341 (95% confidence interval: -0.41,-0.017, P = 0.035). CONCLUSIONS: In this case series of 31 patients from a developing country, there were no differences in clinical outcomes at the final follow-up between acute and delayed surgical interventions for ruptured AVMs. The most important factor associated with the final outcomes was the initial Glasgow Coma Scale.

Overall survival and cause-specific mortality in a hospital-based cohort of retinoblastoma patients in São Paulo, Brazil.

Studies are lacking on long-term effects among retinoblastoma patients in low- and middle-income countries. Therefore, we examined cause-specific mortality in a retrospective cohort of retinoblastoma patients treated at Antonio Candido de Camargo Cancer Center (ACCCC), São Paulo, Brazil from 1986 to 2003 and followed up through December 31, 2018. Vital status and cause of death were ascertained from medical records and multiple national databases. We estimated overall and cause-specific survival using the Kaplan-Meier survival method, and estimated standardized mortality ratios (SMRs) and absolute excess risk (AER) of death. This cohort study included 465 retinoblastoma patients (42% hereditary, 58% nonhereditary), with most (77%) patients diagnosed at advanced stages (IV or V). Over an 11-year average follow-up, 80 deaths occurred: 70% due to retinoblastoma, 22% due to subsequent malignant neoplasms (SMNs) and 5% to non-cancer causes. The overall 5-year survival rate was 88% consistent across hereditary and nonhereditary patients (p = .67). Hereditary retinoblastoma patients faced an 86-fold higher risk of SMN-related death compared to the general population (N = 16, SMR = 86.1, 95% CI 52.7-140.5), corresponding to 42.4 excess deaths per 10,000 person-years. This risk remained consistent for those treated with radiotherapy and chemotherapy (N = 10, SMR = 90.3, 95% CI 48.6-167.8) and chemotherapy alone (N = 6, SMR = 80.0, 95% CI 35.9-177.9). Nonhereditary patients had only two SMN-related deaths (SMR = 7.2, 95% CI 1.8-28.7). There was no excess risk of non-cancer-related deaths in either retinoblastoma form. Findings from this cohort with a high proportion of advanced-stage patients and extensive chemotherapy use may help guide policy and healthcare planning, emphasizing the need to enhance early diagnosis and treatment access in less developed countries.

Overcoming challenges to reduce time to antibiotic therapy in febrile neutropenic children: insights from a Mexican center.

BACKGROUND: Providing quality supportive therapy for children with cancer is essential to reduce the high mortality rates in low- and middle-income countries. Febrile neutropenia is the most common life-threatening complication of cancer in children. The objective of this study was to evaluate the long-term effectiveness of the 'Golden Hour' intervention in reducing the time to administer antibiotics and its impact on clinical outcomes in a Mexican hospital. METHODS: A comparative study of children with febrile neutropenia who attended the emergency department at the Hospital Universitario "Dr. José Eleuterio González" was performed between January 2017 and December 2022. In May 2019, this center joined the collaborative 'Mexico in Alliance with St. Jude' project. An adapted improvement program was developed based on the implementation of an algorithm comprising institutional guidance, supplies kit, standardization of sample processing, training of healthcare providers, and patient education. The time to antibiotic administration was compared with clinical outcomes between the historical control and post-intervention groups. RESULTS: A total of 291 patients were included, 122 in the pre-intervention period and 169 in the intervention period. Only 5.7 % of the pre-intervention group received the first dose of antibiotics within 60 min of presenting to the emergency department compared to 84.6 % in the intervention group (p-value <0.000). The median times to antibiotic administration in the pre-intervention and post-intervention periods were 269.4 and 50.54 min, respectively (p-value <0.000). Clinical deterioration and admission to the pediatric intensive care unit decreased significantly from 6.6 % to 2.3 % (p-value = 0.03). CONCLUSIONS: Sustainability of the quality improvement project 'Golden Hour' in low- to mid-income countries demonstrated high effectiveness in reducing time to antibiotic administration among children with febrile neutropenia and improved clinical outcomes over three years of implementation.

The Brazilian version of the Johns Hopkins dementia care needs assessment (JHDCNA-br 2.0): translation, cultural adaptation, and preliminary psychometric testing.

OBJECTIVES: People with dementia have several unmet needs during the syndrome progression. More unmet needs are related to hospitalizations, injuries, and death. Little is known about the care needs for people living with dementia in Brazil. This study aims to translate and adapt the Johns Hopkins Dementia Care Needs Assessment (JHDCNA 2.0), a tool design to identify the dementia-related needs of people with dementia and their caregivers, to Brazilian Portuguese, and to verify psychometric properties. METHOD: JHDCNA 2.0 underwent a translation, back-translation, and cultural adaptation. Preliminary psychometric testing of the Brazilian version (JHDCNA-Br 2.0) included pilot testing and experts' assessment, analyses of reliability, evidence based on test content and relations to other variables. We conducted 140 in-home interviews to assess several sociodemographic and health aspects and to be able to complete the JHDCNA-Br 2.0. RESULTS: The JHDCNA-Br 2.0 is reliable and has evidence based on test content and on relations to other variables for people living with dementia and caregivers. Preliminary results suggest high prevalence of unmet needs. CONCLUSION: JHDCNA-Br 2.0 is a reliable and valid tool. The availability of this tool brings new opportunities to the study of dementia care, taking into consideration cultural aspects and may help inform future approaches to dementia care delivery to support persons and families affected by these conditions.

The mediating effect of resilience between work fatigue and psychological distress among healthcare workers in Brazil, Lebanon, Nigeria, Pakistan, Poland, Qatar, Serbia, and Tunisia.

OBJECTIVES: To test the hypothesis that resilience has a mediating effect on the association between work fatigue and psychological distress. METHODS: A cross-sectional survey was conducted online in eight countries in 2021: Brazil, Lebanon, Nigeria, Pakistan, Poland, Qatar, Serbia, and Tunisia. A total of 1094 healthcare professionals specialized in medicine, pharmacy, and nurse practitioners that were exposed to/worked with COVID-19 patients were included (age: 33.89 ± 10.79 years; 59.6% females). RESULTS: After adjusting for potential confounders (i.e., country, gender, primary work in emergency department, primary work in infectious disease, primary work in intensive care unit, working in a COVID-19 ward, and working voluntary hours), the results of the mediation analysis showed that resilience fully mediated the association between physical work fatigue and psychological distress and partially mediated the associations between mental and emotional work fatigue and psychological distress. Higher work fatigue was significantly associated with less resilience; higher resilience was significantly associated with less psychological distress. Finally, higher mental and emotional, but not physical, work fatigue, were directly and significantly associated with more psychological distress. CONCLUSION: Identifying resilience as an important mediator in the path from fatigue to distress helps elucidate underlying mechanisms and pathways leading to the mental health-alteration process among healthcare workers during COVID-19. New strategies targeting resilience may be developed to further improve mental health outcomes among healthcare workers.

Mortality of Young Women due to Breast Cancer in Low, Middle and High-Income Countries: Systematic Literature Review and Meta-Analysis.

OBJECTIVE: To identify the difference in breast cancer mortality rates among young women according to countries' economic classification. METHODS: A systematic literature review included retrospective studies on breast cancer mortality rates in women aged 20 to 49 years. Databases used were PubMed, Web of Science, Scopus, and Virtual Health Library, with articles selected in English, Portuguese, and Spanish. The study selection and analysis were conducted by two pairs of researchers. Data from 54 countries were extracted, including 39 high-income, 12 upper-middle-income, and 3 lower-middle-income countries. A meta-analysis was performed with the quantitative data from two studies. RESULTS: Six articles met the inclusion criteria. Four were analyzed descriptively due to data diversity, and two were included in the meta-analysis. The pooled mortality rate for high-income countries was 10.2 per 100,000 women (95% CI: 9.8-10.6), while for upper-middle-income countries, it was 15.5 per 100,000 women (95% CI: 14.9-16.1). Lower-middle-income countries had a pooled mortality rate of 20.3 per 100,000 women (95% CI: 19.5-21.1). The decrease in mortality rates in high-income countries was statistically significant (p<0.05). CONCLUSION: Mortality rates for breast cancer among young women have decreased significantly in high-income countries but have increased in lower-income countries. This disparity underscores the impact of insufficient investment in preventive measures, health promotion, early diagnosis, and treatment on young women's mortality in lower-income countries.

Physical Activity Perceptions and Participation of People With Type II Diabetes Mellitus in the Dominican Republic.

INTRODUCTION: Physical activity (PA) improves health outcomes for people with type II diabetes mellitus (diabetes), but little is known about PA among Dominicans. The purpose was to evaluate PA participation and perceptions among people with diabetes in the Dominican Republic (DR). METHODS: Participants (N=29) were recruited from an urban diabetes clinic in DR. PA was assessed via accelerometry and Godin Leisure Time Exercise Questionnaire (GLTEQ). RESULTS: Eighteen women and 11 men enrolled (age: 55 ± 13 years; BMI: 28.6 ± 4.5 kg·m-2). Twenty-seven participants reached acceptable wear time. Using a one-minute bout minimum, moderate- to vigorous-intensity PA (MVPA) was 152.2 ± 59.7 min·day-1; no vigorous PA was recorded. GLTEQ scores (103 ± 98) classified 25 participants as active. Around 93% reported that PA was "very important" for their health. There was no association between GLTEQ and MVPA (p>0.2). Participants who reported being "very active" (n=17) did more MVPA than those who were "rarely active" or "somewhat active" (n=10; p=0.02). CONCLUSION: Dominicans with diabetes are highly physically active but do very little vigorous PA. The GLTEQ was not an accurate measure of PA. Future research should develop validated questionnaires and evaluate structured exercise and dietary interventions.

To use or not to use electronic cigarettes? Reasons for use, stopping use and their behavioural sequelae among Mexicans who smoke.

INTRODUCTION: Reasons for using and stopping the use of e-cigarettes and their associations with transitions in nicotine product use are relatively unknown in countries with e-cigarette bans, such as Mexico. METHODS: Data comes from an open cohort of people who smoke in Mexico, surveyed every 4 months from November 2018 to November 2021. Those who smoked and used e-cigarettes at time t (n=904 individuals, 1653 observations) were categorised at 4-month follow-up (t+1): (1) continued 'dual use', (2) exclusive smoking, (3) exclusive use of e-cigarettes or neither product. For people who formerly used e-cigarettes at time t (n=332 individuals, 372 observations), follow-up categories were: (1) continued exclusive smoking; (2) re-initiated e-cigarette use. Multinomial and logistic models regressed follow-up status (ref=status at time t) on reasons for using or stopping e-cigarette use, respectively, at time t, adjusting for covariates. RESULTS: The most prevalent reasons for current e-cigarette use were 'they were less harmful to others' (40.5%) and 'enjoyable' (39.0%). Those who reported using e-cigarettes because they were less harmful to others (Adjusted Relative Risk Ratio (ARRR)=0.67), more enjoyable (ARRR=0.52), could help them to quit smoking (ARRR=0.65), or to control weight (ARRR=0.46) were less likely to return to exclusively smoking. Among people who formerly used e-cigarettes, lack of satisfaction was the primary reason for stopping e-cigarette use (32%) and those who reported this were less likely to start using e-cigarettes again at follow-up (Adjusted Odds Ratio (AOR)=0.58). CONCLUSIONS: Specific reasons for using and stopping e-cigarettes predict changes in smoking and e-cigarette use, and targeting these beliefs could promote desired behaviour changes.

Human-Induced Range Expansions Result in a Recent Hybrid Zone between Sister Species of Ducks.

Landscapes are consistently under pressure from human-induced ecological change, often resulting in shifting species distributions. For some species, changing the geographical breadth of their niche space results in matching range shifts to regions other than those in which they are formally found. In this study, we employ a population genomics approach to assess potential conservation issues arising from purported range expansions into the south Texas Brush Country of two sister species of ducks: mottled (Anas fulvigula) and Mexican (Anas diazi) ducks. Specifically, despite being non-migratory, both species are increasingly being recorded outside their formal ranges, with the northeastward and westward expansions of Mexican and mottled ducks, respectively, perhaps resulting in secondary contact today. We assessed genetic ancestry using thousands of autosomal loci across the ranges of both species, as well as sampled Mexican- and mottled-like ducks from across overlapping regions of south Texas. First, we confirm that both species are indeed expanding their ranges, with genetically pure Western Gulf Coast mottled ducks confirmed as far west as La Salle county, Texas, while Mexican ducks recorded across Texas counties near the USA-Mexico border. Importantly, the first confirmed Mexican × mottled duck hybrids were found in between these regions, which likely represents a recently established contact zone that is, on average, ~100 km wide. We posit that climate- and land use-associated changes, including coastal habitat degradation coupled with increases in artificial habitats in the interior regions of Texas, are facilitating these range expansions. Consequently, continued monitoring of this recent contact event can serve to understand species' responses in the Anthropocene, but it can also be used to revise operational survey areas for mottled ducks.

Shaping the curve from the microscopic transsphenoidal to the endoscopic endonasal approach for the sellar region.

OBJECTIVE: This study aimed to investigate the limitations, barriers, and complications in the early transition from the microscopic transsphenoidal approach (MTA) to the endonasal endoscopic approach (EEA) to the skull base in our institution. METHODS: Technical challenges, as well as clinical features and complications, were compared between MTA, EEA, and mixed cases during the early surgical curve. RESULTS: The period from the early learning curve was 1 year until the EEA protocol was used routinely. A total of 34 patients registered a resection using a transsphenoidal approach. Eighteen patients underwent EEA, 11 underwent MTA, and five underwent a mixed endonasal and microscopic approach. Non-significant differences were found in endocrine outcomes between the three groups. Patients with unchanged or improved visual function were higher in the EEA group (p = 0.147). Non-significant differences were found in terms of the extent of resection (EOR) between groups (p = 0.369). Only 1 (2.9%) patient in the whole series developed a post-operative CSF leaking that resolved with medical management, belonging to the EEA group (5.5%). CONCLUSIONS: The early phase of the learning curve did not affect our series significantly in terms of the EOR, endocrine status, and visual outcomes.

OBJETIVO: Investigar las limitaciones, las barreras y las complicaciones en la transición del abordaje transesfenoidal microscópico (ATM) al abordaje endonasal endoscópico (AEE) para la base del cráneo en nuestra institución. MÉTODO: Se compararon las características clínicas y las complicaciones entre ATM, AEE y casos mixtos durante la curva quirúrgica temprana. RESULTADOS: El periodo desde la curva de aprendizaje inicial fue de 1 año hasta que se utilizó el protocolo AEE de forma sistemática. Un total de 34 pacientes tuvieron una resección por vía transesfenoidal. A 18 pacientes se les realizó AEE, a 11 ATM y a 5 abordaje mixto endonasal y microscópico. Se encontraron diferencias no significativas en los resultados endocrinos entre los tres grupos. Los pacientes con función visual sin cambios o mejorada fueron más en el grupo AEE (p = 0.147). No se encontraron diferencias significativas respecto a la extensión de la resección (p = 0.369). Solo 1 (2.9%) paciente desarrolló una fístula de líquido cefalorraquídeo que se resolvió con manejo médico, perteneciente al grupo AEE (5.5%). CONCLUSIONES: La fase inicial de la curva de aprendizaje no afectó significativamente a nuestra serie en términos de extensión de la resección, estado endocrino y resultados visuales.