Shed teeth from Portezuelo formation at Sierra del Portezuelo reveal a higher diversity of predator theropods during Turonian-Coniacian times in northern Patagonia.

The study of thirty-two shed crowns from the Portezuelo Formation (middle Turonian-late Coniacian) at the Sierra del Portezuelo locality, reveals six distinct tooth morphotypes identified through cladistic, discriminant, and cluster analyses. Two morphotypes were identified as belonging to Megaraptoridae, three to Abelisauridae, one to Abelisauroidea, and one to Alvarezsauridae. Additionally, two of the morphotypes exhibit a combination of dental features typically found in megaraptorid and abelisauridtheropods. These results suggest a greater diversity of theropods in the original ecosystem than previously thought, including the presence of a second morphotype of megaraptorid and alvarezsaurid previously undocumented in this formation. Furthermore, the existence of Morphotype 6 indicates the potential coexistence of medium-sized abelisauroids alongside larger abelisaurids in the same ecosystem. These findings underscore the importance of future expeditions to the Sierra del Portezuelo locality to further our understanding of these previously unknown theropod species.

A new genus of scutigerid centipede from southern South America with the description of two new species and an updated molecular phylogeny of the myriapod order Scutigeromorpha (Myriapoda: Chilopoda).

Scutigeromorph centipedes are conspicuous, yet often ignored myriapods for which little work has been conducted in southern South America. After examining recent and museum collections from Chile and Argentina, two new species of generic uncertainty were identified. A new genus of scutigerid centipede, Edgethreua , is therefore described with two new species, E. chilensis from Central Chile (type species of the genus) and E. goloboffi from Argentinian Patagonia. The new genus is characterised by the presence of scattered setiform bristles with short paired spines and the absence of simple spinulae and spines on all stomatotergites, the presence of a single spine-bristle in the prefemur of the second maxilla, a patch of cuticular ridges and pores surrounding the sensilla of the proximal labral portion of the epipharynx, the morphology of the sensilla of the distal patch of the hypopharynx and the morphology of the female gonopods. A phylogenetic analysis of the new species using two nuclear ribosomal RNA genes (18S and 28S rRNA), two mitochondrial ribosomal RNA genes (12S and 16S rRNA) and the mitochondrial protein-encoding gene cytochrome c oxidase subunit I show that the new genus does not cluster with any other described genus of scutigeromorph represented in molecular phylogenies. The data indicate that the new genus is probably sister group to a clade including the genera Lassophora , Ballonema and the subfamily Thereuoneminae, although one analysis suggests a position as sister group to Scutigerinae. ZooBank: urn:lsid:zoobank.org:pub:A4D453F3-9031-4E21-84C7-87F16C07AD51.

Human diphyllobothriasis in Argentina: assessing the epidemiological significance from historical records and reports of new cases.

Between 1898 and 1940, eight human cases of diphyllobothriasis were reported in Argentina, always in recently arrived European immigrants. In 1982, the first autochthonous case was detected, and since then, 33 other autochthonous cases have been reported, totaling 42 cases of human diphyllobothriasis in Argentina before the present study. Our aim is to update the information on diphyllobothriasis in Argentina by identifying specimens from new cases using morphometrical and/or molecular methods. We also aim to assess the epidemiological relevance of this food-borne disease in the country. Anamnestic data were obtained from patients or professionals, along with 26 worms identified using morphometrical (21 samples) and molecular techniques (5 samples). All the patients acquired the infection by consuming freshwater salmonids caught in Andean lakes in Northern Patagonia. Morphometrics and DNA markers of worms were compatible with Dibothriocephalus latus. In total, 68 human cases have been detected in Argentina, 60 of which were autochthonous. The human population living North-western Patagonia, whose lakes are inhabited by salmonids, is increasing. Similarly, the number of other definitive hosts for Dibothriocephalus dendriticus (gulls) and for D. latus (dogs) is also increasing. In addition, salmonid fishing and the habit of consuming home-prepared raw fish dishes are becoming widespread. Therefore, it is to be expected that diphyllobothriasis in Argentina will increase further.

Spatial pattern analysis of the impact of community food environments on foetal macrosomia, preterm births and low birth weight.

Community food environments (CFEs) have a strong impact on child health and nutrition and this impact is currently negative in many areas. In the Republic of Argentina, there is a lack of research evaluating CFEs regionally and comprehensively by tools based on geographic information systems (GIS). This study aimed to characterize the spatial patterns of CFEs, through variables associated with its three dimensions (political, individual and environmental), and their association with the spatial distribution in urban localities in Argentina. CFEs were assessed in 657 localities with ≥5,000 inhabitants. Data on births and CFEs were obtained from nationally available open-source data and through remote sensing. The spatial distribution and presence of clusters were assessed using hotspot analysis, purely spatial analysis (SaTScan), Moran's Index, semivariograms and spatially restrained multivariate clustering. Clusters of low risk for LBW, macrosomia, and preterm births were observed in the central-east part of the country, while high-risk clusters identified in the North, Centre and South. In the central-eastern region, low-risk clusters were found coinciding with hotspots of public policy coverage, high night-time light, social security coverage and complete secondary education of the household head in areas with low risk for negative outcomes of the birth variables studied, with the opposite with regard to households with unsatisfied basic needs and predominant land use classes in peri-urban areas of crops and herbaceous cover. These results show that the exploration of spatial patterns of CFEs is a necessary preliminary step before developing explanatory models and generating novel findings valuable for decision-making.

Patient perspectives and overall satisfaction after liver resection for benign disease.

BACKGROUND: Management of benign liver lesions (BLLs) is still an object of discussion. Frequently, patients receive multiple opinions about their diagnosis and treatment from physicians specialized in different areas, which can be opposite and controversial. This study aimed to understand patients' decision-making process in electing surgery and assess their satisfaction after resection for BLLs. METHODS: A 104-question survey was administered to 98 patients who had a resection for BLLs in 4 different hepatopancreatobiliary and transplant centers in Argentina. The first section included 64 questions regarding the initial discovery of the BLL, the decision-making process, and the understanding of the patient's feelings after surgery. The second section, 42 queries, referred to the quality of life. The patient's final diagnosis and outcome were correlated with the survey results using univariate analysis. RESULTS: Among 97 patients who had undergone liver resection for BLLs, 69 (70%) completed the survey. The median age was 51.71 years (range, 18-75), and 63% of the patients were females. Moreover, 21% of patients received conflicting information from different healthcare providers. Surgeons were the best to describe the BLL to the patient (63%), and 30% of patients obtained opinions from multiple surgeons. The respondents were quite or fully satisfied with their decision to have surgery (90%) and the decision-making process (91%). Only 59% of patients considered their lifestyle better after surgery, and 89% of patients would have retaken the same decision. CONCLUSION: Patients with resected BLLs are delighted with the decision to have surgery, regardless of the final diagnosis and outcome. The role of surgeons is crucial in the decision-making process.

[Asymmetries between national articulation and the autonomy of state governments in implementing health technologies to fight COVID-19 in Argentina]. / Asimetrías entre la coordinación nacional y la autonomía de los gobiernos estatales en la adopción de tecnologías sanitarias frente a la COVID-19 en Argentina.

Argentina, as other countries, showed several public policies related to the health technologies implemented to fight and treat the COVID-19 pandemic. This study sought to analyze how articulation vs. cooperation and autonomy vs. division of powers between entities occurred in Argentina, exploring asymmetries between several entities in implementing public policies related to health technologies during the pandemic and the influences of other actors. For this, a documentary research was carried out related to 2020-2021 (technical reports published by the World Health Organization, national agencies and scientific societies, laws, court decisions, press, and research and in-depth interviews with members of the Argentine Ministries of Health). The processes and results of decision-making in the Ministries of Health were analyzed, outlining the coverage and orientations of each technology and the political party in power in the province. This study found heterogeneous results and processes between Ministries and disputes within them. It also observed the poor adherence to official guidelines due to technical-political criteria (power relations, social, media, academic, judiciary, and legislative pressure). Some cases showed a strong tension between the government and its opposition over the discussion of technologies. Each province in Argentina has autonomously defined its policies on health technologies for COVID-19, and decision-making in public administration was disorderly, complex, and non-linear during the pandemic.

En pandemia, en Argentina y en otros países se observó variabilidad en las políticas públicas implementadas sobre tecnologías sanitarias para prevención y tratamiento de la COVID-19. El objetivo fue analizar cómo se procesaron en Argentina los movimientos de coordinación vs. cooperación, y de autonomía vs. reparto de autoridad entre entidades, explorando asimetrías entre diferentes entidades en la implementación de políticas públicas sobre tecnologías sanitarias en pandemia y las influencias de otros actores. Se realizó una revisión documental del período 2020-2021 (informes técnicos publicados por la Organización Mundial de la Salud, organismos nacionales y sociedades científicas, leyes, fallos judiciales, prensa, encuestas y entrevistas en profundidad a miembros de los Ministerios de Salud de Argentina). Se indagó sobre procesos y resultados de la toma de decisiones en los Ministerios de Salud, mapeando la cobertura y recomendación de cada tecnología y el partido político provincial gobernante. Hubo heterogeneidad en resultados y procesos entre los Ministerios, y disputas en el interior de los mismos. La adherencia a recomendaciones oficiales fue baja, influyendo distintos criterios técnico-políticos (relaciones de poder, presión social, de los medios, académicos, poder Judicial y Legislativo). En algunos casos se observó una fuerte tensión entre oficialismo y oposición al partido gobernante a partir de la discusión sobre tecnologías. Cada provincia argentina definió sus políticas sobre tecnologías sanitarias para COVID-19 con autonomía, y la toma de decisiones en la administración pública en pandemia fue desordenada, compleja y no lineal.

Na Argentina, assim como em outros países, houve uma variabilidade de políticas públicas relacionadas às tecnologias de saúde implementadas no combate e tratamento da COVID-19 durante a pandemia. Este estudo buscou analisar como ocorreram a articulação vs. cooperação, e a autonomia vs. divisão de poderes entre as entidades na Argentina, explorando assimetrias entre diferentes entidades na implementação de políticas públicas relacionadas a tecnologias de saúde na pandemia, bem como as influências de outros atores. Para tanto, realizou-se uma pesquisa documental para o período de 2020-2021 (relatórios técnicos publicados pela Organização Mundial da Saúde, agências nacionais e sociedades científicas, leis, decisões judiciais, imprensa, pesquisas e entrevistas em profundidade com membros dos Ministérios da Saúde da Argentina). Os processos e os resultados da tomada de decisão nos Ministérios da Saúde foram analisados, traçando a cobertura e orientações de cada tecnologia e o partido político no poder na província. Observou-se uma heterogeneidade nos resultados e processos entre os Ministérios, e disputas em seu interior. Houve uma baixa adesão às orientações oficiais, influenciada por diferentes critérios técnico-políticos (relações de poder, pressão social, midiática, acadêmica, do poder Judiciário e do Legislativo). Em alguns casos, observou-se uma forte tensão entre governo e oposição a partir da discussão das tecnologias. Cada província da Argentina definiu suas políticas sobre tecnologias de saúde para a COVID-19 de forma autônoma, e a tomada de decisões na administração pública foi desordenada, complexa e não linear durante a pandemia.

Emergence of NDM-producing Enterobacterales infections in companion animals from Argentina.

Antimicrobial resistance is considered one of the most critical threat for both human and animal health. Recently, reports of infection or colonization by carbapenemase-producing Enterobacterales in companion animals had been described. This study report the first molecular characterization of NDM-producing Enterobacterales causing infections in companion animals from Argentina. Nineteen out of 3662 Enterobacterales isolates analyzed between October 2021 and July 2022 were resistant to carbapenemes by VITEK2C and disk diffusion method, and suspected to be carbapenemase-producers. Ten isolates were recovered from canine and nine from feline animals. Isolates were identified as K. pneumoniae (n = 9), E. coli (n = 6) and E. cloacae complex (n = 4), and all of them presented positive synergy among EDTA and carbapenems disks, mCIM/eCIM indicative of metallo-carbapenemase production and were also positive by PCR for blaNDM gene. NDM variants were determined by Sanger sequencing method. All 19 isolates were resistant to ß-lactams and aminoglycosides but remained susceptible to colistin (100%), tigecycline (95%), fosfomycin (84%), nitrofurantoin (63%), minocycline (58%), chloramphenicol (42%), doxycycline (21%), enrofloxacin (5%), ciprofloxacin (5%) and trimethoprim/sulfamethoxazole (5%). Almost all isolates (17/19) co-harbored blaCTX-M plus blaCMY, one harbored blaCTX-M alone and the remaining blaCMY. E. coli and E. cloacae complex isolates harbored blaCTX-M-1/15 or blaCTX-M-2 groups, while all K. pneumoniae harbored only blaCTX-M-1/15 genes. All E. coli and E. cloacae complex isolates harbored blaNDM-1, while in K. pneumoniae blaNDM-1 (n = 6), blaNDM-5 (n = 2), and blaNDM-1 plus blaNDM-5 (n = 1) were confirmed. MLST analysis revealed the following sequence types by species, K. pneumoniae: ST15 (n = 5), ST273 (n = 2), ST11, and ST29; E. coli: ST162 (n = 3), ST457, ST224, and ST1196; E. cloacae complex: ST171, ST286, ST544 and ST61. To the best of our knowledge, this is the first description of NDM-producing E. cloacae complex isolates recovered from cats. Even though different species and clones were observed, it is remarkable the finding of some major clones among K. pneumoniae and E. coli, as well as the circulation of NDM as the main carbapenemase. Surveillance in companion pets is needed to detect the spread of carbapenem-resistant Enterobacterales and to alert about the dissemination of these pathogens among pets and humans.

5th Argentinean Meeting on Evolutionary Biology (RABE V): Report on the "Evo-Devo" Extended Symposium.

Evolutionary developmental biology (Evo-Devo) is flourishing in Latin America, particularly Argentina, where researchers are leveraging this integrative field to unlock the secrets of the region's remarkable biodiversity. A recent symposium held at the 5th Argentinean Meeting on Evolutionary Biology (RABE V) showcased a vibrant Evo-Devo community and the diversity of its research endeavors. The symposium included 3 plenary talks, 3 short talks, and 12 posters, and spanned a range of organisms and approaches. Interestingly, the symposium highlighted a prevalence of "top-down" Evo-Devo studies in the region, where researchers first analyze existing diversity and then propose potential developmental mechanisms. This approach, driven in part by financial constraints and the region's historical focus on natural history, presents a unique opportunity to bridge disciplines like comparative biology, paleontology, and botany. The symposium's success underscores the vital role of Evo-Devo in Latin America, not only for advancing our understanding of evolution but also for providing valuable tools to conserve and manage the region's irreplaceable biodiversity. As Evo-Devo continues to grow in Latin America, fostering collaboration and knowledge exchange within the region and beyond will be crucial for realizing the full potential of this transformative field.

Hydrochemistry and trace metals in water and sediments in forest coastal wetlands influenced by tidal regime in the middle Río de la Plata estuary, Argentina.

Coastal wetland ecosystems are of utmost importance in regulating the mobility and distribution of elements in water and sediments, being the flooding by tidal events a recurrent process that strongly controls the hydrodynamics of the system. The aim of this work is to assess the control of the tidal regime and anthropogenic influence on the dynamics of some trace metals in water and sediments in the Punta Lara Natural Reserve situated in the Río de la Plata littoral. For that purpose, relationship between tidal flows, surface water and groundwater was evaluated. Also, hydrochemistry was analyzed based on the study of major ions and trace metals, being the presence of high concentrations of elements in groundwater, such as Fe and Mn, probably favoured by redox processes associated with organic matter decomposition in the water - sediment interaction. Sediments in the wetland register deficient to minimal enrichment in most of the studied trace metals despite the numerous contributions that the Río de la Plata receives in relation to dissolved and particulate trace metals from diverse anthropogenic contributions. Despite that, there is a moderate enrichment in Pb and Cr in the surface sediments of the wetland. The data analyzed within the natural reserve in relation to the chemical composition of the water and sediments of the coastal wetland showed the strong influence of the tidal regime over the area.

A devastating blow: personal reflections on Argentina's scientific decline.

As an Argentine scientist, the defunding of CONICET and INTA feels like a blow to progress and our future. Despite free education, these cuts force talented researchers to seek opportunities abroad. Argentina's history of scientific achievement, from Nobel Prizes to COVID-19 vaccines, is at risk. Defunding science weakens our ability to solve problems and compete globally.

A Past Genetic Bottleneck from Argentine Beans and a Selective Sweep Led to the Race Chile of the Common Bean (Phaseolus vulgaris L.).

The domestication process of the common bean gave rise to six different races which come from the two ancestral genetic pools, the Mesoamerican (Durango, Jalisco, and Mesoamerica races) and the Andean (New Granada, Peru, and Chile races). In this study, a collection of 281 common bean landraces from Chile was analyzed using a 12K-SNP microarray. Additionally, 401 accessions representing the rest of the five common bean races were analyzed. A total of 2543 SNPs allowed us to differentiate a genetic group of 165 accessions that corresponds to the race Chile, 90 of which were classified as pure accessions, such as the bean types 'Tórtola', 'Sapito', 'Coscorrón', and 'Frutilla'. Our genetic analysis indicates that the race Chile has a close relationship with accessions from Argentina, suggesting that nomadic ancestral peoples introduced the bean seed to Chile. Previous archaeological and genetic studies support this hypothesis. Additionally, the low genetic diversity (π = 0.053; uHe = 0.53) and the negative value of Tajima' D (D = -1.371) indicate that the race Chile suffered a bottleneck and a selective sweep after its introduction, supporting the hypothesis that a small group of Argentine bean genotypes led to the race Chile. A total of 235 genes were identified within haplotype blocks detected exclusively in the race Chile, most of them involved in signal transduction, supporting the hypothesis that intracellular signaling pathways play a fundamental role in the adaptation of organisms to changes in the environment. To date, our findings are the most complete investigation associated with the origin of the race Chile of common bean.

Pine needle abortions in cattle due to consumption of Pinus ponderosa in Argentina: Case reports.

Two outbreaks of pine needle abortions in cattle are here reported for the first time in Argentina. The cases occurred in Chubut and Neuquén provinces in the Patagonia region, causing 29.6% and 9% of abortions in each herd respectively. In both outbreaks, the dams were in the last third of gestation, and, due to a period of cold, snow and lack of available forage, they gained access to Pinus ponderosa and Pinus contorta forests. No pathological lesions, serological, molecular, or microbiological evidence of infectious causes were observed in any of the six fetuses analyzed. Microhistological analysis of feces confirmed higher presence of fragments of Pinus spp. needles in the diet of affected dams than in that of non-affected ones (12.2 vs 3.0%). Moreover, toxicological analysis showed higher tetrahydroagathic acid in the sera of affected dams than in that of non-affected ones (10.05 vs 2.81 ppm). In addition, this acid was detected in different fetal fluids (3.6-8.1 ppm) of the six fetuses analyzed. Interestingly, isocupressic acid was detected only in needles of P. ponderosa, and its content was lower than that found in other areas of the world (0.31 and 0.5% in Chubut and Neuquén respectively). These results confirm that the consumption of P. ponderosa by dams could have been the cause of these abortion outbreaks, a fact that should be considered as differential diagnosis in abortions of cattle, especially in silvopastoral systems of Argentina.

Development of mental health first-aid guidelines for a person after a potentially traumatic event: A Delphi expert consensus study in Argentina and Chile.

BACKGROUND: Exposure to potentially traumatic events increases the risk of a person developing a mental disorder. Training community members to offer support to a person during and after a traumatic situation may help lower this risk. This study reports on the cultural adaptation of Australian mental health first aid guidelines for individuals exposed to a potentially traumatic event to the Chilean and Argentinian context. METHODS: A Delphi expert consensus study was conducted with two panels of experts, one of people with lived experience of trauma (either their own or as a carer; n = 26) and another one of health professionals (n = 41). A total of 158 items, drawn from guidelines developed by Australian experts in 2019, were translated to Spanish and evaluated in a two-round survey process. The panellists were asked to rate each item on a five-point Likert scale; statements were included in the final guidelines if 80% of both panels endorsed the item as "essential" or "important". RESULTS: Consensus was achieved on 142 statements over two survey rounds. A total of 102 statements were included from the English-language guidelines, and 40 locally generated statements were accepted in the second round. Local experts endorsed a larger number of items compared to their counterparts in Australia and emphasised the importance of acknowledging the first aider's limitations, both personally and as part of their helping role. Additional items about working as a team with other first responders and considering helping the person's significant others were endorsed by the local panellists. CONCLUSIONS: The study showed a high level of acceptance of the original actions suggested for inclusion in the guidelines for Australia, but also a significant number of new statements that highlight the importance of the adaptation process. Further research on the dissemination of these guidelines into a Mental Health First Aid training course for Chile and Argentina is still required.

Population structure and connectivity among coastal and freshwater Kelp Gull (Larus dominicanus) populations from Patagonia.

The genetic identification of evolutionary significant units and information on their connectivity can be used to design effective management and conservation plans for species of concern. Despite having high dispersal capacity, several seabird species show population structure due to both abiotic and biotic barriers to gene flow. The Kelp Gull is the most abundant species of gull in the southern hemisphere. In Argentina it reproduces in both marine and freshwater environments, with more than 100,000 breeding pairs following a metapopulation dynamic across 140 colonies in the Atlantic coast of Patagonia. However, little is known about the demography and connectivity of inland populations. We aim to provide information on the connectivity of the largest freshwater colonies (those from Nahuel Huapi Lake) with the closest Pacific and Atlantic populations to evaluate if these freshwater colonies are receiving immigrants from the larger coastal populations. We sampled three geographic regions (Nahuel Huapi Lake and the Atlantic and Pacific coasts) and employed a reduced-representation genomic approach to genotype individuals for single-nucleotide polymorphisms (SNPs). Using clustering and phylogenetic analyses we found three genetic groups, each corresponding to one of our sampled regions. Individuals from marine environments are more closely related to each other than to those from Nahuel Huapi Lake, indicating that the latter population constitutes the first freshwater Kelp Gull colony to be identified as an evolutionary significant unit in Patagonia.

["We are families too": LGBT experiences and demands for access to Surrogacy in Argentina]. / "También somos familias": experiencias y demandas LGBT por el acceso a la gestación por sustitución en Argentina.

Surrogacy (GS) has been established as a means of access to male homoparenting and, despite not being regulated in Argentina, it is negotiated in a "paralegal" scenario. For some time now, LGBT organizations have proposed regulation based on the argument that GS represents the only option available for a male homosexual couple to have a child with a genetic link, albeit with only one of them, and consecutively acknowledge the family ties of both. By means of ethnographic work carried out within the scope of a postgraduate research project, our objective is to ascertain the experiences of male homosexual couples who seek the legitimacy of GS processes and equal access to the healthcare system. With this in mind, we seek a reflection that articulates the construction of public health policies and the claims of sectors of the LGBT movement, focusing on the meanings of the collective experience, on the ways in which these actors organize their family demands, and on the conceptions and practices that articulate these claims with the production of public policies.

La gestación por sustitución (GS) se ha instalado como una vía de acceso a la homoparentalidad masculina y pese a que en Argentina no está reglamentada, se lleva adelante en un escenario "paralegal". Desde hace tiempo, organizaciones LGBT proponen su regulación bajo el argumento de que la GS representa la única opción que tiene una pareja de varones homosexuales de tener un/a hijo/a con lazo genético, aunque sólo con uno de ellos, y reconocer consecutivamente ambos vínculos filiatorios. A través del trabajo etnográfico realizado en el marco de un proyecto de investigación de posgrado, nuestro objetivo es recuperar las experiencias de parejas gays que buscan la legitimidad de los procesos de GS y el acceso igualitario en el sistema de salud. En ello, apuntamos a una reflexión que articula la construcción de políticas públicas en salud y los reclamos de sectores del movimiento LGBT, poniendo el foco en los sentidos de la experiencia colectiva, en los modos en que estos actores organizan sus demandas familiaristas y en las concepciones y prácticas que articulan esos reclamos con la producción de políticas públicas.

Between choices and decisions. Genetics in homoparental families through surrogacy in Argentina. / Entre elecciones y decisiones. La genética en familias homoparentales por gestación por sustitución en Argentina.

Comprehensive access to medically assisted reproduction procedures and techniques in Argentina has been assured by National Law No. 26,862 since 2013. This Law does not include surrogacy procedures, and the lack of specific regulation shifts practices to a paralegal setting. In this context, planned parenthood by male couples through surrogacy is performed through actions that convey demands for access rights and active State policies. For these couples, the argument is that surrogacy is the only option to have a child with a genetic bond with at least one of the two parents and recognize both filiatory bonds. This work results from field work in progress with parents from the Province of Buenos Aires running this practice in Argentina. Based on in-depth interviews, we attempted to rebuild personal experiences and analyze the meanings that the narratives construct regarding their parenting, the biological connections in establishing or defining family relationships, and the importance of genetics in constructing and maintaining affiliations.

En Argentina desde 2013 existe la Ley Nacional 26.862 de acceso integral a los procedimientos y técnicas de reproducción médicamente asistida (TRA). Esta no incluye los procedimientos de gestación por sustitución (GS) y la ausencia de regulación específica mueve las prácticas a un escenario de paralegalidad. En este contexto, las paternidades planificadas por parejas de varones a través de GS se llevan adelante mediante acciones que vehiculizan demandas de derechos de acceso y políticas activas del Estado. Para estas parejas el argumento es que la GS representa la única opción para tener un/a hijo/a con vínculo genético con al menos uno de los dos padres y poder reconocer ambos vínculos filiatorios. El presente trabajo es el resultado de un trabajo de campo en proceso con padres de Buenos Aires que están llevando adelante esta práctica en Argentina. A partir de entrevistas en profundidad intentamos reconstruir las experiencias personales y analizar los sentidos que construyen las narrativas respecto de sus parentalidades, las conexiones biológicas en la creación o definición de los lazos familiares y analizamos la importancia de la genética en la construcción y mantenimiento de vínculos filiatorios.

Phylodynamic analysis of foot-and-mouth disease virus evolution in Mar Chiquita, Argentina.

Foot-and-mouth disease is a highly contagious disease affecting cloven-hoofed animals, resulting in considerable economic losses. Its causal agent is foot-and-mouth disease virus (FMDV), a picornavirus. Due to its error-prone replication and rapid evolution, the transmission and evolutionary dynamics of FMDV can be studied using genomic epidemiological approaches. To analyze FMDV evolution and identify possible transmission routes in an Argentinean region, field samples that tested positive for FMDV by PCR were obtained from 21 farms located in the Mar Chiquita district. Whole FMDV genome sequences were obtained by PCR amplification in seven fragments and sequencing using the Sanger technique. The genome sequences obtained from these samples were then analyzed using phylogenetic, phylogeographic, and evolutionary approaches. Three local transmission clusters were detected among the sampled viruses. The dataset was analyzed using Bayesian phylodynamic methods with appropriate coalescent and relaxed molecular clock models. The estimated mean viral evolutionary rate was 1.17 × 10- 2 substitutions/site/year. No significant differences in the rate of viral evolution were observed between farms with vaccinated animals and those with unvaccinated animals. The most recent common ancestor of the sampled sequences was dated to approximately one month before the first reported case in the outbreak. Virus transmission started in the south of the district and later dispersed to the west, and finally arrived in the east. Different transmission routes among the studied herds, such as non-replicating vectors and close contact contagion (i.e., aerosols), may be responsible for viral spread.

Association between environmental gradient of anthropization and phenotypic plasticity in two species of triatomines.

BACKGROUND: Triatoma garciabesi and T. guasayana are considered secondary vectors of Trypanosoma cruzi and frequently invade rural houses in central Argentina. Wing and head structures determine the ability of triatomines to disperse. Environmental changes exert selective pressures on populations of both species, promoting changes in these structures that could have consequences for flight dispersal. The aim of this study was to investigate the relationship between a gradient of anthropization and phenotypic plasticity in flight-related traits. METHODS: The research was carried out in Cruz del Eje and Ischilín departments (Córdoba, Argentina) and included 423 individuals of the two species of triatomines. To measure the degree of anthropization, a thematic map was constructed using supervised classification, from which seven landscapes were selected, and nine landscape metrics were extracted and used in a hierarchical analysis. To determine the flight capacity and the invasion of dwellings at different levels of anthropization for both species, entomological indices were calculated. Digital images of the body, head and wings were used to measure linear and geometric morphometric variables related to flight dispersion. One-way ANOVA and canonical variate analysis (CVA) were used to analyze differences in size and shape between levels of anthropization. Procrustes variance of shape was calculated to analyze differences in phenotypic variation in heads and wings. RESULTS: Hierarchical analysis was used to classify the landscapes into three levels of anthropization: high, intermediate and low. The dispersal index for both species yielded similar results across the anthropization gradient. However, in less anthropized landscapes, the density index was higher for T. garciabesi. Additionally, in highly anthropized landscapes, females and males of both species exhibited reduced numbers. Regarding phenotypic changes, the size of body, head and wings of T. garciabesi captured in the most anthropized landscapes was greater than for those captured in less anthropized landscapes. No differences in body size were observed in T. guasayana collected in the different landscapes. However, males from highly anthropized landscapes had smaller heads and wings than those captured in less anthropized landscapes. Both wing and head shapes varied between less and more anthropogenic environments in both species. CONCLUSIONS: Results of the study indicate that the flight-dispersal characteristics of T. garciabesi and T. guasayana changed in response to varying degrees of anthropization.

[Calciphylaxis, risk factors, treatment and outcomes. Retrospective study of 39 patients]. / Calcifilaxis, factores de riesgo, tratamiento y evolución. Estudio retrospectivo de 39 pacientes.

INTRODUCTION: Calciphylaxis is a serious vascular disorder characterized by calcification of tunica media, intimal hyperplasia, thrombosis, and skin necrosis. It was described in patients with renal failure (UC), although it can occur in its absence (NUC). Its risk factors are under study and its diagnosis can be complex. Over a decade ago, its mortality was estimated at 60-80%. Recent studies indicate that it has decreased (40%). METHODS: A retrospective study was carried out in the period between January 1, 2011 and December 31, 2019. The past medical record, clinical characteristics, laboratory and histopathological findings, and evolution of all patients with calciphylaxis evaluated at the Hospital Italiano de Buenos Aires were reviewed. RESULTS: Thirty-nine patients were included. Sixtyone percent were men and 39% were NUC cases. Eightytwo percent had arterial hypertension, 66% obesity and 46% diabetes. Of those, 49% received coumarin anticoagulants. All patients with NUC and 75% with UC presented ulcers with necrosis, located more frequently on the legs. In 72% of the cases the histological diagnosis was made with one biopsy. In all the treatment was multimodal and mortality at one year was 42%. CONCLUSION: We observed a high proportion of patients with NUC, in relation to what is reported in the literature, and that half received vitamin K antagonists. The histological diagnosis was made with one biopsy in most of the cases, as the surgical technique for taking the sample, the Von Kossa staining and the evaluation by an expert pathologist were the key of it.

Introducción: La calcifilaxis es un trastorno vascular grave caracterizado por depósito de calcio en túnica media arteriolar, trombosis y necrosis cutánea. Se describió en pacientes con insuficiencia renal (CU), aunque puede producirse en su ausencia (CNU). Sus factores de riesgo están en estudio y su diagnóstico puede ser complejo. Su mortalidad se estimaba en 60-80%, aunque trabajos recientes indican que ha disminuido (40%). Métodos: Estudio retrospectivo entre el 1/1/2011 y el 31/12/2019. Se revisaron los antecedentes, las características clínicas, los hallazgos de laboratorio e histopatológicos, y la evolución de todos los pacientes con diagnóstico de calcifilaxis evaluados en el Hospital Italiano de Buenos Aires. Resultados: Se incluyeron 39 pacientes. El 61.5% (24) eran hombres y 38.5% (15) fueron casos de CNU. De éstos, 82% presentaba hipertensión arterial, 66% obesidad y 46% diabetes. El 49% recibía anticoagulantes dicumarínicos. Todos los pacientes con CNU y 75% con CU presentaron úlceras de fondo necrótico, localizadas con mayor frecuencia en las piernas. En 72% de los casos el diagnóstico histológico se efectuó con una toma de biopsia. En todos, el tratamiento fue multimodal y la mortalidad al año fue de 42%. Conclusión: Observamos una elevada proporción de pacientes con CNU, en relación con lo comunicado en la literatura, y la mitad recibía anticoagulantes dicumarínicos. El diagnóstico histológico se efectuó por biopsia en la mayor parte de los casos, para lo cual la toma quirúrgica de la muestra, la tinción con Von Kossa y la evaluación por un patólogo experto fueron claves.