Revisión narrativa del modelo de desarrollo positivo para adultos emergentes chilenos / A narrative review of the positive development model for Chilean emerging adults / Revisão narrativa do modelo de desenvolvimento positivo para adultos emergentes chilenos

Introducción: El desarrollo positivo es un estadio de ajuste psicosocial que acentúa las potencialidades y los recursos entre jóvenes y sus contextos próximos. En Australia, se desarrolló el primer modelo de desarrollo positivo para adultos emergentes, el cual consta de cinco componentes (competencia social, satisfacción con la vida, confianza y tolerancia con los otros, confianza hacia autoridades e instituciones, acción y compromiso cívico), pero no ha sido investigado en Chile. Objetivo: Analizar la evidencia disponible en la literatura científica sobre los cinco componentes del modelo de desarrollo positivo en adultos emergentes universitarios de Chile. Materiales y métodos: Revisión narrativa de la literatura publicada entre 2013 y 2023, en bases de datos Web of Science, Scopus, SciELO, Redalyc y Dialnet. Resultados: Se obtuvieron 83 artículos, de los cuales 53 cumplieron los requisitos de inclusión; en su mayor parte fueron estudios cuantitativos (81,13%) y en español (75,47%). Se evidenció una disparidad en la cantidad de estudios por temática; se encuentra mayor investigación en satisfacción con la vida y acción y compromiso cívico. Conclusiones: Existen brechas en la literatura científica chilena en el estudio del desarrollo positivo; además de que se discuten particularidades idiosincrásicas y desafíos asociados a la etapa de adultez emergente.

Introduction: Positive development is a stage of psychosocial adjustment that accentuates the potentials and resources of young people and their close contexts. The first positive development model for emerging adulthood was developed in Australia, which includes five components: social; life satisfaction; trust and tolerance of others; trust in the authorities and institutions; and action and civic engagement. However, this model has not been investigated in Chile. Objective: To analyze the evidence available in the scientific literature on the five components of the positive development model in emerging adults universities. Materials and methods: A narrative review of the literature published between 2013 and 2023 in the Web of Science, Scopus, SciELO, Redalyc, and Dialnet databases was conducted. Results: 83 articles were selected, of which 53 met the inclusion criteria; most of them were qualitative studies (81.13%) and in Spanish (75.47%). There is an evident disparity in terms of the number of studies and topics, e.g., there is more research on life satisfaction and civic action and commitment. Conclusions: There are gaps in the Chilean scientific literature in the study of positive development. In addition, idiosyncratic particularities and challenges associated with the stages of emerging adulthood are discussed.

Introdução: O desenvolvimento positivo é uma fase de ajustamento psicossocial que acentua o potencial e os recursos dos jovens e dos seus contextos imediatos. Na Austrália, foi desenvolvido o primeiro modelo de desenvolvimento positivo para adultos emergentes, que consiste em cinco componentes (social, satisfação com a vida, confiança e tolerância com os outros, confiança nas autoridades e instituições, ação e envolvimento cívico), mas ainda não foi investigado no Chile. Objetivo: Analisar as evidências disponíveis na literatura científica sobre os cinco componentes do modelo de desenvolvimento positivo em adultos universitários emergentes no Chile. Materiais e métodos: Revisão narrativa da literatura publicada entre 2013 e 2023, nas bases de dados Web of Science, Scopus, SciELO, Redalyc e Dialnet. Resultados: foram obtidos 83 artigos, dos quais 53 atenderam aos requisitos de inclusão; A maioria deles eram estudos quantitativos (81,13%) e em espanhol (75,47%). Ficou evidente uma disparidade no número de estudos por tema; Há mais pesquisas sobre satisfação com a vida e ação e compromisso cívico. Conclusões: Existem lacunas na literatura científica chilena no estudo do desenvolvimento positivo; Além disso, são discutidas particularidades e desafios idiossincráticos associados à fase da idade adulta emergente.

Doubling the known diversity of a remote island fauna: marine bivalves of the Juan Fernández and Desventuradas oceanic archipelagos (Southeastern Pacific Ocean).

Juan Fernández and Desventuradas are two oceanic archipelagos located in the southeastern Pacific Ocean far off the Chilean coast that received protected status as marine parks in 2016. Remoteness and access difficulty contributed to historically poor biodiversity sampling and limited associated research. This is particularly noticeable for bivalves, with most prior regional publications focused on single taxa or un-illustrated checklists. This study investigates marine bivalves collected between the intertidal and 415 m depth during (1) the 1997 IOC97 expedition aboard the M/V Carlos Porter, with special focus on scuba-collected micro-mollusks of both archipelagos, (2) two expeditions by the R/V Anton Bruun (Cruise 12/1965 and Cruise 17/1966), and (3) Cruise 21 of USNS Eltanin under the United States Antarctic Program, which sampled at Juan Fernández in 1965. Also, relevant historical material of the British H.M.S. Challenger Expedition (1873-1876), the Swedish Pacific Expedition (1916-1917), and by German zoologist Ludwig H. Plate (1893-1895) is critically revised. A total of 48 species are recognized and illustrated, including 19 new species (described herein) and six other potentially new species. The presence of two species mentioned in the literature for the region (Aulacomya atra and Saccella cuneata) could not be confirmed. The genera Verticipronus and Halonympha are reported for the first time from the Eastern Pacific, as are Anadara and Condylocardia from Chilean waters. Lectotypes are designated for Arca (Barbatia) platei and Mytilus algosus. These findings double the number of extant bivalve species known from the Juan Fernández and Desventuradas archipelagos, highlighting the lack of attention these islands groups have received in the past. A high percentage of species endemic to one or both archipelagos are recognized herein, accounting for almost 78% of the total. The newly recognized level of bivalve endemism supports the consideration of Juan Fernández and Desventuradas as two different biogeographic units (Provinces or Ecoregions) of the Eastern Pacific Ocean.

The 5Cs of positive youth development: their impact on symptoms of depression, anxiety, stress, and emotional distress in Chilean adolescents.

Effective approaches to addressing mental health challenges faced by adolescents require a deep understanding of the factors contributing to optimal development, well-being, and prosperity. From the perspective of Positive Youth Development (PYD), this study proposes to examine the relationship between the 5Cs of PYD (Competence, Confidence, Connection, Character, and Caring) and symptoms of depression, anxiety, stress, and emotional distress among Chilean adolescents. A quantitative, cross-sectional, non-experimental study was conducted with 425 adolescents (ages 12 to 19, M = 14.95, SD = 1.81) from three Chilean cities: Arica (23%), Alto Hospicio (32%), and Iquique (46%). Data analysis included the use of confirmatory factor analysis (CFA) and structural equation modeling (SEM). The results indicate that two of the 5Cs, Confidence and Connection, have a significant negative direct effect on the four evaluated criterion indicators. These findings contribute to the literature on positive youth development in Latin America and underscore the importance of fostering confidence and connection in interventions aimed at promoting the mental health of adolescents in Chile and in similar contexts.

Protective factors for the risk of suffering intimate partner violence in help-seeking women survivors from a social organization in Chile.

Objective: Intimate partner violence (IPV) is a major public health problem in Latin America. The present study investigates the protective factors that contribute to minimizing the risk of exposure to IPV analyzing different variables in a sample of Chilean women victims of IPV. Methods: We used data from the Cicatrices Foundation, a nonprofit Chilean organization providing psychological support to IPV victims. Relevant variables for IPV prevention were identified analyzing a database containing all the information reported by victims during a structured interview. A final sample of 444 women suffering IPV was used in the present study. Results: Logistic regression analysis was calculated in order to make predictions related to IPV protective factors, showing that having a support network (OR = 2.85), treatment compliance (OR = 2.05) and being younger (OR = 0.95) increased the probability of not living with the aggressor. Another logistic regression analysis was calculated in order to predict IPV victims´ health taking medication intake as an indicator. A significant association was observed between this variable and working outside (p = 0.002) and between mediation intake and age (p < 0.001), with an OR of 1.987 and 0.93, respectively. Working outside and being younger were identified as protective factors against consuming medication. Conclusion: To the best of our knowledge, this is one of the first studies conducted in Chile on the prevention of IPV in a sample of victims seeking for help. Our results will contribute to guide policy makers, researchers and other women in the prevention of potential risks for IPV.

Are Rattus rattus fleas invasive? Evaluation of flea communities in invasive and native rodents in Chile.

Co-invasion, characterized by the simultaneous introduction of hosts and parasites with the latter establishing themselves in native hosts, is a phenomenon of ecological concern. Rattus rattus, a notorious invasive species, has driven the extinction and displacement of numerous avian and mammalian species and serves as a key vector for diseases affecting both humans and wildlife. Among the parasites hosted by R. rattus are fleas, which exhibit obligate parasitic behaviour, a generalist nature and high prevalence, increasing the likelihood of flea invasion. Simultaneously, invasive species can serve as hosts for native parasites, leading to potential amplification or dilution of parasite populations in the environment. In Chile, R. rattus has been present since the 17th century because of the arrival of the Spanish colonizers through the ports and has spread throughout urban, rural and wild Chilean territories. This study aims to evaluate whether co-invasion of native fleas of invasive rats occurs on native rodents in Chile and to determine whether black rats have acquired flea native to Chile during their invasion. For this, we captured 1132 rodents from 26 localities (20° S-53° S). Rattus rattus was found coexisting with 11 native rodent species and two species of introduced rodents. Among the native rodents, Abrothrix olivacea and Oligoryzomys longicaudatus exhibited more extensive sympatry with R. rattus. We identified 14 flea species associated with R. rattus, of which only three were native to rats: Xenopsylla cheopis, Leptopsylla segnis and Nosopsyllus fasciatus. These three species presented a higher parasite load in black rats compared to native fleas. Leptopsylla segnis and N. fasciatus were also found associated with native rodent species that cohabit with R. rattus. The remaining species associated with R. rattus were fleas of native rodents, although they were less abundant compared to those associated with native rodents, except for Neotyphloceras pardinasi and Sphinctopsylla ares. Although there has been evidence of flea transmission from rats to native species, the prevalence and abundance were relatively low. Therefore, it cannot be definitively concluded that these fleas have established themselves in native rodent populations, and hence, they cannot be classified as invasive fleas. This study underscores R. rattus' adaptability to diverse environmental and geographical conditions in Chile, including its capacity to acquire fleas from native rodents. This aspect has critical implications for public health, potentially facilitating the spread of pathogens across various habitats where these rats are found.

[Do not resuscitate orders and limitation of therapeutic effort: Ethical challenges in healthcare teams in Chile]. / Orden de no reanimar y limitación del esfuerzo terapéutico: desafíos éticos en equipos sanitarios en Chile.

The purpose of this paper is to delve into the ethical aspects experienced by the healthcare team when they receive the directive to limit therapeutic effort or a do-not-resuscitate order. From an interpretative, qualitative paradigm with a content analysis approach, a process based on three phases was conducted: pre-analysis in which categories were identified, the projection of the analysis, and inductive analysis. During 2023, interviews were conducted in the clinical setting of a high-complexity hospital in Chile with 56 members of the healthcare teams from critical and emergency units, from which four categories emerged: a) the risk of violating patients' rights by using do-not-resuscitate orders and limiting therapeutic effort; b) the gap in the interpretation of the legal framework addressing the care and attention of patients at the end of life or with terminal illnesses by the healthcare team; c) ethical conflicts in end-of-life care; and d) efficient care versus holistic care in patients with terminal illness. There are significant gaps in bioethics training and aspects of a good death in healthcare teams facing the directive to limit therapeutic effort and not resuscitate. It is suggested to train personnel and work on a consensus guide to address the ethical aspects of a good death.

El propósito de este trabajo es profundizar en los aspectos éticos que experimenta el equipo de salud cuando reciben la indicación de limitar el esfuerzo terapéutico o la orden de no reanimar. Desde un paradigma interpretativo, cualitativo y con un enfoque de análisis de contenido, se realizó un proceso basado en tres fases: preanálisis en el que se identificaron las categorías, la proyección del análisis y el análisis inductivo. Durante 2023, se realizaron entrevistas en el entorno clínico de un hospital de alta complejidad en Chile a 56 miembros de equipos de salud de unidades críticas y urgencias, de las que emergieron cuatro categorías: a) riesgo de vulnerar los derechos de los pacientes al utilizar la orden de no reanimar, y limitación del esfuerzo terapéutico; b) brecha en la interpretación del marco legal que aborda la atención y cuidado de pacientes al final de la vida, o con enfermedades terminales por parte del equipo de salud; c) conflictos éticos de la atención al final de la vida; y d) el cuidado eficiente o el cuidado holístico en pacientes con enfermedad terminal. Existen brechas importantes en la formación en bioética y aspectos del buen morir en los equipos de salud que se enfrentan a la orden de limitar el esfuerzo terapéutico y no reanimar. Se sugiere capacitar al personal, y trabajar una guía de consenso para abordar los aspectos éticos del buen morir.

Enriching cross-sectoral collaboration to foster inclusive cultures in schools: a Model to address the needs of diverse Chilean Students.

Inclusive education involves the interaction of diverse actors from different societal sectors, such as education, health, and policy. Inclusion laws and regulations in Chile are relatively new and have been taken as a regional model. However, the efforts to implement them have revealed some structural difficulties that must be discussed. This conceptual analysis article aims to provide insights to enrich cross-sectoral collaboration to foster inclusive cultures in Chilean schools. Considering the OECD Analytical Framework, which describes a systemic approach, we provide definitions for the critical components of the model and discuss the advances and challenges of current Chilean public policies in this field -including the Chile Crece Contigo and the School Integration Programs (SIP)-, the Chilean education system functioning, the social contexts, and students' needs and supports based on the available evidence. Building from inclusive education literature and previous experiences, we delve into the model to address the needs of students with disabilities, social and cultural disadvantages, students belonging to the indigenous population, and students with a low socioeconomic level to propose action guidelines with a particular focus on integrating inclusive practices at the school level.

Chilean Darwin Wasps (Ichneumonidae): Biogeographic Relationships and Distribution Patterns.

Ichneumonidae, or Chilean Darwin wasps, are an important component of South American hymenopteran diversity, but the taxonomic and distributional knowledge on this insect is still deficient. Taking advantage of recently updated taxonomic knowledge, we assessed biogeographic relationships at the genus level and biodiversity spatial patterns along the latitudinal gradient. The results show the presence of 264 species in Chile, arranged in 102 genera and 22 subfamilies. Biogeographic relationships are based on six elements (cosmopolitan (n = 50; 36%), endemic (n = 29; 21%), Neotropical (n = 22; 16%), Holarctic-Oriental (n = 19; 14%), south-temperate (n = 16; 11%) and Australasian) and composed of just three genera: Anacis, Labena, and Meringops. Species and genera show a bimodal distribution along the latitudinal gradient: around 34° and 38° S. From an ecoregional perspective, richness is concentrated in the Valdivian temperate forests, but when assessed at a 0.5 × 0.5 cell scale, several outstanding cells are in the contact zone between the temperate forests and the Chilean Matorral. On the other hand, the Atacama Desert shows little or no presence of Darwin wasps. The results agree with Charles Porter, who identified a northern province composed of Neotropical and cosmopolitan genera with their own representatives in the far north (11 genera), a distributional gap in the core of the Atacama Desert, and around 128 genera in Porter's Neantarctic realm, covering all of Chile from 25° S to Cape Horn, including the Juan Fernandez islands. These results reinforce knowledge gaps and the need for more sampling and studies of available collections. Due to sampling gaps at this stage, identifying a continued increase or decrease in richness towards higher latitudes is not possible. More taxonomic and distributional information is also needed to assess potential threats to endemic genera and species.

Victimization, polyvictimization, and depression symptoms among immigrants and native children and youth in Chile.

BACKGROUND: Migration exposes children and youth to vulnerabilities, including uprooting, lack of protection, limited access to services, and violence. Previous studies have shown that victimization experiences impact the mental health of migrant children, including depression, anxiety, and post-traumatic stress disorder. This study aims to examine the co-occurrence of multiple forms of maltreatment (polyvictimization) among migrant and Chilean children and youth and its association with depressive symptoms, addressing a research gap in Latin America. METHODS: Secondary data from the National Polyvictimization Survey (NPS) conducted by the Chilean Ministry of the Interior were analyzed. Measures assessing polyvictimization and depressive symptoms were administered to a sample of 1362 participants, with equal group sizes for migrants and Chilean-born individuals. Data analysis included descriptive statistics, group comparisons, correlation analyses, and multiple regression analyses. RESULTS: The study revealed marked differences in experiences of conventional crime victimization and polyvictimization between migrant and Chilean-born participants, with migrants facing slightly higher incidences. Correlational analysis indicated variable strengths of association between victimization types and depressive symptoms across groups, with Chilean-born individuals showing stronger correlations for certain victimization forms. Multiple regression analysis highlighted gender, polyvictimization, child maltreatment, internet victimization, sexual victimization, and peer/sibling victimization as significant predictors of depressive symptoms across the sample. Notably, an interaction was observed between child maltreatment and migrant status, indicating a mitigated impact of maltreatment on depressive symptoms among migrant adolescents. This suggests the potential for unique resilience or coping mechanisms in this group. CONCLUSIONS: This study elucidates the varied victimization experiences of migrant children and youth in Chile, with a notable emphasis on the mitigating effect of migrant status on the relationship between child maltreatment and depressive symptoms. It highlights the resilience and potential adaptive strategies of migrant minors facing adversity. The findings underscore the necessity of developing support and intervention strategies that recognize the specific needs and strengths of migrant children and youth, advocating for policies that protect and empower this vulnerable demographic amidst new environmental challenges.

Ambient air pollution exposure and COVID-19 related hospitalizations in Santiago, Chile.

Morbidity and mortality from several diseases are increased on days of higher ambient air pollution. We carried out a daily time-series analysis with distributive lags to study the influence of short-term air pollution exposure on COVID-19 related hospitalization in Santiago, Chile between March 16 and August 31, 2020. Analyses were adjusted for temporal trends, ambient temperature, and relative humidity, and stratified by age and sex. 26,579 COVID-19 hospitalizations were recorded of which 24,501 were laboratory confirmed. The cumulative percent change in hospitalizations (95% confidence intervals) for an interquartile range increase in air pollutants were: 1.1 (0.2, 2.0) for carbon monoxide (CO), 0.30 (0.0, 0.50) for nitrogen dioxide (NO2), and 2.7 (1.9, 3.0) for particulate matter of diameter ≤ 2.5 microns (PM2.5). Associations with ozone (O3), particulate matter of diameter ≤ 10 microns (PM10) and sulfur dioxide (SO2) were not significant. The observed effect of PM2.5 was significantly greater for females and for those individuals ≥ 65 years old. This study provides evidence that daily increases in air pollution, especially PM2.5, result in a higher observed risk of hospitalization from COVID-19. Females and the elderly may be disproportionately affected.

Knowledge and attitudes of physicians in Chile toward Do-Not-Attempt-Resuscitation orders: A cross-sectional nation-wide study.

Objective: Do-Not-Attempt-Resuscitation orders originated in the early 1960s with the establishment of advanced cardiopulmonary resuscitation. These orders aim to limit therapeutic efforts in cases where it may be futile. The decision not to resuscitate a patient is a process that involves a series of ethical, legal, and clinical considerations. Still, it also requires a process in which priority is given to the patients and their autonomy. The objective of this study was to describe the knowledge and attitudes of physicians working in Chile toward Do-Not-Attempt-Resuscitation orders. Methods: A cross-sectional study was conducted, in which a digital questionnaire was sent to physicians from different regions of Chile. Quantitative variables were analyzed using measures of central tendency and dispersion (e.g., median and interquartile range), while qualitative variables were evaluated using frequencies and percentages. Results: Four hundred and thirty-one physicians completed the survey. 85.4% were familiar with the ethical and legal guidelines for cardiopulmonary resuscitation and the rights and duties of the patient. 39.2% believed that patients should have the final decision Do-Not-Attempt-Resuscitation orders, especially if they themselves requested not to be resuscitated. 87.7% mentioned that the Do-Not-Attempt-Resuscitation orders should be reassessed if the patient's prognosis improves. In addition, it was found that the decision not to resuscitate was not always discussed with the patient or their family. Conclusions: The study revealed an ethical conflict regarding Do-Not-Attempt-Resuscitation orders and their management by Chilean physicians. Therefore, it is necessary to create recommendations and provide training to guide professionals in this process, which should also involve patients and their families.

Ecological consequences of hidden pathology by larval digeneans in South American mollusks.

The study of digeneans and their association with mollusks commenced in Europe and South America during the mid-19th to early 20th centuries. Digenean infestation can severely degrade host tissue, leading to diminished energy resources and eventual host mortality. However, these parasites can also induce various non-lethal effects, including changes in growth rates, survival rates, and reproductive capabilities, alongside physiological and behavioral alterations. While numerous studies have explored the ecological effects of digeneans on hosts in Europe and North America, our understanding of these dynamics in South America, particularly in first intermediate hosts, remains limited. Therefore, this paper aims to provide an overview of ecological investigations into digenean-mollusk systems in South America, emphasizing the importance of robust sampling designs and statistical analyses to address key ecological inquiries. Although fascinating examples exist of parasitism influencing different hierarchical levels of digenean-mollusk systems, particularly at the individual, population, and community levels, documentation of their ecosystem-level impacts is comparatively sparse. As South American studies of digenean-mollusk systems from an ecological perspective are still in their early stages, there is immense potential for uncovering unique ecological patterns in this largely unexplored region, propelling us toward further developmental strides in the parasite ecology.

Four Unique Genetic Variants in Three Genes Account for 62.7% of Early-Onset Severe Retinal Dystrophy in Chile: Diagnostic and Therapeutic Consequences.

Leber congenital amaurosis (LCA)/early-onset severe retinal dystrophy (EOSRD) stand as primary causes of incurable childhood blindness. This study investigates the clinical and molecular architecture of syndromic and non-syndromic LCA/EOSRD within a Chilean cohort (67 patients/60 families). Leveraging panel sequencing, 95.5% detection was achieved, revealing 17 genes and 126 variants (32 unique). CRB1, LCA5, and RDH12 dominated (71.9%), with CRB1 being the most prevalent (43.8%). Notably, four unique variants (LCA5 p.Glu415*, CRB1 p.Ser1049Aspfs*40 and p.Cys948Tyr, RDH12 p.Leu99Ile) constituted 62.7% of all disease alleles, indicating their importance for targeted analysis in Chilean patients. This study underscores a high degree of inbreeding in Chilean families affected by pediatric retinal blindness, resulting in a limited mutation repertoire. Furthermore, it complements and reinforces earlier reports, indicating the involvement of ADAM9 and RP1 as uncommon causes of LCA/EOSRD. These data hold significant value for patient and family counseling, pharmaceutical industry endeavors in personalized medicine, and future enrolment in gene therapy-based treatments, particularly with ongoing trials (LCA5) or advancing preclinical developments (CRB1 and RDH12).

Carexrecondita Muñoz-Schüler, Martín-Bravo & Jim.Mejías (Carex section Junciformes Kük., Cyperaceae), a new sedge species from the Andes of central Chile.

CarexsectionJunciformes is one of the most diverse groups of the genus in South America, consisting of approximately 30 species. Here we describe a new species, Carexrecondita, belonging to this section. We studied its placement within a molecular phylogeny of the group and found it to constitute an independent lineage. The new species is morphologically very close to C.austroamericana, from southern Patagonia, despite being phylogenetically divergent to the rest of Patagonian species of sect. Junciformes. So far, this species is known only from a few specimens recently collected in its type locality, despite growing in a well-collected area in the Andes of Metropolitana Region of Santiago, the most populated administrative region of Chile. We provide a detailed morphological description, comments on its relationship with other Southern Cone species of sect. Junciformes and relevant ecological notes.

Pathological lesions associated with avian schistosomes (Digenea: Schistosomatidae) in the freshwater snail Chilina dombeiana (Gastropoda: Chilinidae) from Southern Chile.

Avian schistosomes inhabit the blood stream of domestic and wild birds with aquatic snails as their intermediate hosts. In the Neotropics there is an emerging effort to describe species from these hosts, including Chile, although the knowledge about their pathological consequences is mostly understudied. This study aimed to describe the pathological changes associated with the parasitism of a native schistosomatid restricted to the Southern Cone of Neotropics. To achieve this, a total of 401 Chilina dombeiana snails (Chilinidae) were collected in two locations from Southern Chile. All of them were disposed to cercarial release procedure for three consecutive days. Furcocercariae released were stained and characterized by microscopic evaluation. Then, all snails were dissected under stereomicroscope and preserved in 10 % buffered formalin until histopathological analysis was performed. Eight out 401 (P = 2 %) snails were found parasitized with avian schistosomes. The released furcocercariae were identified as Schistosomatidae gen. sp. Lineage II which was previously reported in the same host. The main pathological change was an atrophy of ovotestes and an absence or mild infiltration of hemocytes in the surrounding tissues. Besides, a co-infection with echinostomes was found which was associated with a moderate hemocyte infiltration, granuloma-like lesion, and a reduced presence of schistosome' sporocysts. The latter would suggest an antagonistic interaction between these two digeneans, as has been proposed in the Echinostoma spp.-Schistosoma mansoni model. Despite the above, the release of furcocercariae was present but reduced, in contrast with the non-release of echinocercariae. This interaction requires further attention. This study represents the first attempt to characterize the pathological consequences of parasitism by a native, yet undescribed, avian schistosome in an endemic snail. Future studies should consider experimental infections to understand the dynamics of single infections in other Chilina species, including inter- and intra-specific parasitism as previous studies have found, including this study.

Redescription of the enigmatic myriapod Hanseniellachilensis (Hansen, 1903) (Symphyla, Scutigerellidae) based on scanning electron microscope images of Chilean specimens.

Hanseniellachilensis is the only myriapod of the class Symphyla known from Chile. This garden centipede, or pseudocentipede, was described more than 120 years ago based on morphologically incomplete specimens collected in central Chile, a well-known biodiversity hotspot. In this study, we redescribe this species based on morphologically complete specimens collected near the type locality using scanning electron microscope images. Our study provides the description of diagnostic characters hitherto unknown in this species such as macrochaetae of the tergites and spinnerets of the cerci. We also include a new record from central Chile and discuss the presumed presence of this species in Argentina and Madagascar.

Socio-spatial analysis of migrant school students according to Bourdieu's capitals in Santiago de Chile (2017-2020).

Chile has experienced a substantial immigration boom in the last 10 years. The urban areas of this nation present high levels of residential segregation, represented in its main city, Santiago. This article presents results of an exploratory analysis of the relationship between residential segregation, immigration rate by educational institutions and changes in school performance. Based on the generation of clusters characterized by cultural, social, economic and symbolic capital, an analysis of the changes in school performance in those schools that received the greatest number of migrants is generated.

Stranding and mass mortality in humboldt penguins (Spheniscus humboldti), associated to HPAIV H5N1 outbreak in Chile.

The highly pathogenic Avian Influenza virus (HPAIV) H5N1 has caused a global outbreak affecting both wild and domestic animals, predominantly avian species. To date, cases of the HPAIV H5 Clade 2.3.4.4b in penguins have exclusively been reported in African Penguins. In Chile, the virus was confirmed in pelicans in December 2022 and subsequently spread across the country, affecting several species, including Humboldt penguins. This study aims to provide an overview of the incidents involving stranded and deceased Humboldt penguins and establish a connection between these events and HPAIV H5N1. Historical data about strandings between 2009 and 2023 was collected, and samples from suspected cases in 2023 were obtained to confirm the presence of HPAIV H5N1. Between January and August 2023, 2,788 cases of stranded and deceased penguins were recorded. Out of these, a total of 2,712 penguins deceased, evidencing a significative increase in mortality starting in early 2023 coinciding with the introduction and spreading of HPAIV H5N1 in the country. Thirty-seven events were categorized as mass mortality events, with the number of deceased penguins varying from 11 to 98. Most cases (97 %) were observed in the North of Chile. One hundred and eighty-one specimens were subjected to HPAIV diagnosis, four of which tested positive for HPAIV H5N1. Spatial analysis validates the correlation between mass mortality events and outbreaks of HPAIV in Chile. However, the limited rate of HPAIV H5N1 detection, which can be attributed to the type and quality of the samples, requiring further exploration.

Work engagement and sense of coherence as predictors of psychological distress during the first phase of the COVID-19 pandemic in Chile.

Objectives: The aim of this study was to analyse the relationship between sense of coherence, work engagement, and work environment variables as predictors of the level of psychological distress during the first phase of the COVID-19 pandemic in Chile. Methods: Cross-sectional descriptive study collected between April 22 and December 16, 2020, using non-probabilistic snowball sampling. The study variables and instruments were socio-demographic variables, work engagement (UWES-9 scale), sense of coherence (Antonovsky SOC-13 scale), and psychological distress (GHQ-12 scale). Multivariate analysis and binary logistic regression were performed including the scores of the three questionnaires and other variables such as effectiveness, safety, stress, health perception, and sex. Finally, the CHAID technique was applied to create a segmentation tree. Results: 72.7 % of participants had high levels of psychological distress, more predominantly among women, with work stress and low sense of coherence acting as the most influential mediators in generating psychological distress, and even more so when both were combined. Low work engagement and the availability of safe and effective means to prevent infection were predictors of psychological distress among workers. Conclusion: During the first phase of the COVID-19 pandemic, factors that contributed to psychological distress in the Chilean population were identified. These included a fair or poor perception of health, being a woman, work-related stress, availability of safety measures, low level of work engagement, and low level of sense of coherence. Identifying these factors may help prevent similar effects in future phases of the current pandemic or in future pandemics.

Community-acquired methicillin-resistant Staphylococcus aureus invasive infections: a case series from Central-South Chile.

The emergence of community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) infections at the end of the 20th century represents a significant shift in the epidemiology of staphylococcal infections and, consequently, their clinical management. There are diverse CA-MRSA clones that are widely spread worldwide, showing differences in their regional dissemination, which has been dynamically changing over time. Although the first CA-MRSA description occurred about 30 years ago, its epidemiology in certain regions, such as South America, has been poorly explored, resulting in a gap in the understanding of the epidemiology of CA-MRSA in under-represented countries/regions. This report describes the first four clinical cases of invasive infections caused by CA-MRSA in a tertiary hospital in the central-southern region of Chile. It also associates the clinical characteristics of the infections with the microbiological and molecular features of the isolates. The four S. aureus isolates belong to sequence type 8, which has been widely described as a cause of community-acquired infections. All of them presented a wide resistome and virulome. Additionally, in two of them, it was possible to reconstruct the COMER genetic element, present in the USA300-Latin American variant clone. Considering these findings, it is crucial to prepare for a potential increase in invasive CA-MRSA infections in Chile. This would involve enhancing current surveillance systems and maintaining a low threshold of suspicion for these infections among clinicians.