One way or another: Combined effect of dispersal and asymmetry on total realized asymptotic population abundance.

Understanding the consequences on population dynamics of the variability in dispersal over a fragmented habitat remains a major focus of ecological and environmental inquiry. Dispersal is often asymmetric: wind, marine currents, rivers, or human activities produce a preferential direction of dispersal between connected patches. Here, we study how this asymmetry affects population dynamics by considering a discrete-time two-patch model with asymmetric dispersal. We conduct a rigorous analysis of the model and describe all the possible response scenarios of the total realized asymptotic population abundance to a change in the dispersal rate for a fixed symmetry level. In addition, we discuss which of these scenarios can be achieved just by restricting mobility in one specific direction. Moreover, we also report that changing the order of events does not alter the population dynamics in our model, contrary to other situations discussed in the literature.

Molecular surveillance of microbial agents from cattle-attached and questing ticks from livestock agroecosystems of Antioquia, Colombia.

Ticks are obligate ectoparasites and vectors of pathogens affecting health, agriculture, and animal welfare. This study collected ticks from the cattle and questing ticks of 24 Magdalena Medio Antioquia region cattle farms. Genomic DNA was extracted from the specimens (individual or pools) of the 2088 adult ticks collected from cattle and 4667 immature questing ticks collected from pastures. The molecular detection of Babesia, Anaplasma, Coxiella and Rickettsia genera was performed by polymerase chain reaction amplification and subsequent DNA sequencing. In a total of 6755 Rhipicephalus microplus DNA samples, Anaplasma marginale was the most detected with a frequency of 2% (Confidence Interval- CI 1.68-2.36), followed by Babesia bigemina with 0.28% (CI 0.16-0.44), Coxiella spp. with 0.15% (CI 0.07-0.27), and Rickettsia spp. with 0.13% (CI 0.06-0.25). Molecular analysis of the DNA sequences obtained from the tick samples revealed the presence of Coxiella-like endosymbiont and R. felis. These results demonstrated the diversity of microorganisms present in R. microplus ticks predominantly associated with cattle and questing ticks from livestock agroecosystems, suggesting their role as reservoirs and potential biological vectors of these microorganisms on the studied sites. Also, it emphasizes the need to combine acarological surveillance with clinical diagnoses and control strategies on regional and national levels.

Adenopatías gigantes en paciente con diagnóstico de linfoma no Hodking / Giant Lymphadenopathy in a Patient Diagnosed with Non-Hodgkin's Lymphoma

El linfoma se encuentra en el área de los ganglios linfáticos a ambos lados (superior e inferior) del diafragma, así como en el bazo(AU)

Chlamydia psittaci seropositivity in workers exposed to birds and review of the literature: Evidence of circulation in Antioquia / Seropositividad de Chlamydia psittaci en trabajadores expuestos a aves y revisión de la literatura: evidencia de circulación en Antioquia.

Introduction: Psittacosis is a zoonotic disease caused by Chlamydia psittaci, a bacterium classified as an agent with bioterrorist potential. It has caused multiple outbreaks in exposed poultry workers around the world. Colombia has no epidemiological follow-up of the infection and a big knowledge gap. Objectives: To determine the antibodies' frequency against C. psittaci in workers with occupational exposure to birds and to review the literature on studies conducted in Colombia. Materials and methods: We conducted a cross-sectional descriptive study with analytical intent on workers in contact with birds and reviewed the related literature in Colombia. IgM and IgG serum antibodies against C. psittaci were detected by microimmunofluorescence. The sociodemographic and exposure characteristics were expressed as frequencies and summary measures. Associated factors were explored by bivariate and multivariate analysis. The scientific and gray literature review was done with a structured search. Results: We analyzed 54 workers in contact with birds. Antibody prevalence was 31.5%. Slaughtering and evisceration by non-veterinarians was a risk factor for antibody presence. There are only four previous studies on C. psittaci in Colombia. Conclusions: Here, we present the first evidence of C. psittaci circulation among workers exposed to birds in Antioquia and the second report in the country. These findings contribute to the "One Health" public health strategy.

Introducción: La psitacosis es una enfermedad zoonótica causada por Chlamydia psittaci. Esta bacteria es catalogada como un agente con potencial bioterrorista y ha causado múltiples brotes en trabajadores con exposición laboral a aves en diferentes lugares del mundo. En Colombia, no se hace seguimiento epidemiológico de la infección y existe una gran brecha en el conocimiento. Objetivos: Determinar la frecuencia de anticuerpos contra C. psittaci en trabajadores con exposición laboral a aves y sus factores asociados. Además, revisar la literatura en relación con los estudios sobre el tema realizados en Colombia. Materiales y métodos: Se llevó a cabo un estudio descriptivo, transversal, con intención analítica, en trabajadores en contacto con aves y se revisó la literatura científica relacionada en Colombia. Se detectaron anticuerpos IgM e IgG contra C. psittaci en suero por microinmunofluorescencia. La descripción de las características sociodemográficas y de exposición se hizo con frecuencias y medidas de resumen. Se exploraron factores asociados por análisis bivariados y multivariados. La revisión de la literatura científica y gris se hizo con búsqueda estructurada. Resultados: Se analizaron 54 trabajadores en contacto con aves y se encontró una prevalencia de anticuerpos del 31,5 %. El ejercer funciones de sacrificio y faenado de las aves sin ser médico veterinario fue un factor de riesgo para la presencia de anticuerpos. Solo se encontraron cuatro estudios previos sobre C. psittaci hechos en Colombia. Conclusiones: Este estudio constituye la primera evidencia de la circulación de C. psittaci en trabajadores en contacto con aves en Antioquia y el segundo reporte en el país. Estos hallazgos aportan desde la salud pública a la estrategia One Health.

Neoadjuvant Chemotherapy plus Interval Cytoreductive Surgery with or without Hyperthermic Intraperitoneal Chemotherapy (NIHIPEC) in the Treatment of Advanced Ovarian Cancer: A Multicentric Propensity Score Study.

INTRODUCTION: Epithelial ovarian cancer (EOC) is primarily confined to the peritoneal cavity. When primary complete surgery is not possible, neoadjuvant chemotherapy (NACT) is provided; however, the peritoneum-plasma barrier hinders the drug effect. The intraperitoneal administration of chemotherapy could eliminate residual microscopic peritoneal tumor cells and increase this effect by hyperthermia. Intraperitoneal hyperthermic chemotherapy (HIPEC) after interval cytoreductive surgery could improve outcomes in terms of disease-free survival (DFS) and overall survival (OS). MATERIALS AND METHODS: A multicenter, retrospective observational study of advanced EOC patients who underwent interval cytoreductive surgery alone (CRSnoH) or interval cytoreductive surgery plus HIPEC (CRSH) was carried out in Spain between 07/2012 and 12/2021. A total of 515 patients were selected. Progression-free survival (PFS) and OS analyses were performed. The series of patients who underwent CRSH or CRSnoH was balanced regarding the risk factors using a statistical analysis technique called propensity score matching. RESULTS: A total of 170 patients were included in each subgroup. The complete surgery rate was similar in both groups (79.4% vs. 84.7%). The median PFS times were 16 and 13 months in the CRSH and CRSnoH groups, respectively (Hazard ratio (HR) 0.74; 95% CI, 0.58-0.94; p = 0.031). The median OS times were 56 and 50 months in the CRSH and CRSnoH groups, respectively (HR, 0.88; 95% CI, 0.64-1.20; p = 0.44). There was no increase in complications in the CRSH group. CONCLUSION: The addition of HIPEC after interval cytoreductive surgery is safe and increases DFS in advanced EOC patients.

The effect of dispersal on asymptotic total population size in discrete- and continuous-time two-patch models.

Many populations occupy spatially fragmented landscapes. How dispersal affects the asymptotic total population size is a key question for conservation management and the design of ecological corridors. Here, we provide a comprehensive overview of two-patch models with symmetric dispersal and two standard density-dependent population growth functions, one in discrete and one in continuous time. A complete analysis of the discrete-time model reveals four response scenarios of the asymptotic total population size to increasing dispersal rate: (1) monotonically beneficial, (2) unimodally beneficial, (3) beneficial turning detrimental, and (4) monotonically detrimental. The same response scenarios exist for the continuous-time model, and we show that the parameter conditions are analogous between the discrete- and continuous-time setting. A detailed biological interpretation offers insight into the mechanisms underlying the response scenarios that thus improve our general understanding how potential conservation efforts affect population size.

Ipsilesional Hippocampal GABA Is Elevated and Correlates With Cognitive Impairment and Maladaptive Neurogenesis After Cortical Stroke in Mice.

BACKGROUND: Cognitive dysfunction is a frequent stroke sequela, but its pathogenesis and treatment remain unresolved. Involvement of aberrant hippocampal neurogenesis and maladaptive circuitry remodeling has been proposed, but their mechanisms are unknown. Our aim was to evaluate potential underlying molecular/cellular events implicated. METHODS: Stroke was induced by permanent occlusion of the middle cerebral artery occlusion in 2-month-old C57BL/6 male mice. Hippocampal metabolites/neurotransmitters were analyzed longitudinally by in vivo magnetic resonance spectroscopy. Cognitive function was evaluated with the contextual fear conditioning test. Microglia, astrocytes, neuroblasts, interneurons, γ-aminobutyric acid (GABA), and c-fos were analyzed by immunofluorescence. RESULTS: Approximately 50% of mice exhibited progressive post-middle cerebral artery occlusion cognitive impairment. Notably, immature hippocampal neurons in the impaired group displayed more severe aberrant phenotypes than those from the nonimpaired group. Using magnetic resonance spectroscopy, significant bilateral changes in hippocampal metabolites, such as myo-inositol or N-acetylaspartic acid, were found that correlated, respectively, with numbers of glia and immature neuroblasts in the ischemic group. Importantly, some metabolites were specifically altered in the ipsilateral hippocampus suggesting its involvement in aberrant hippocampal neurogenesis and remodeling processes. Specifically, middle cerebral artery occlusion animals with higher hippocampal GABA levels displayed worse cognitive outcome. Implication of GABA in this setting was supported by the amelioration of ischemia-induced memory deficits and aberrant hippocampal neurogenesis after blocking pharmacologically GABAergic neurotransmission, an intervention which was ineffective when neurogenesis was inhibited. These data suggest that GABA exerts its detrimental effect, at least partly, by affecting morphology and integration of newborn neurons into the hippocampal circuits. CONCLUSIONS: Hippocampal GABAergic neurotransmission could be considered a novel diagnostic and therapeutic target for poststroke cognitive impairment.

Defective hippocampal neurogenesis underlies cognitive impairment by carotid stenosis-induced cerebral hypoperfusion in mice.

Chronic cerebral hypoperfusion due to carotid artery stenosis is a major cause of vascular cognitive impairment and dementia (VCID). Bilateral carotid artery stenosis (BCAS) in rodents is a well-established model of VCID where most studies have focused on white matter pathology and subsequent cognitive deficit. Therefore, our aim was to study the implication of adult hippocampal neurogenesis in hypoperfusion-induced VCID in mice, and its relationship with cognitive hippocampal deficits. Mice were subjected to BCAS; 1 and 3 months later, hippocampal memory and neurogenesis/cell death were assessed, respectively, by the novel object location (NOL) and spontaneous alternation performance (SAP) tests and by immunohistology. Hypoperfusion was assessed by arterial spin labeling-magnetic resonance imaging (ASL-MRI). Hypoperfused mice displayed spatial memory deficits with decreased NOL recognition index. Along with the cognitive deficit, a reduced number of newborn neurons and their aberrant morphology indicated a remarkable impairment of the hippocampal neurogenesis. Both increased cell death in the subgranular zone (SGZ) and reduced neuroblast proliferation rate may account for newborn neurons number reduction. Our data demonstrate quantitative and qualitative impairment of adult hippocampal neurogenesis disturbances associated with cerebral hypoperfusion-cognitive deficits in mice. These findings pave the way for novel diagnostic and therapeutic targets for VCID.

Comparison of 2 medium cutoff dialyzers versus on-line hemodiafiltration regarding depurative ability and albumin loss: An uncontrolled clinical research.

BACKGROUND: Hemodialysis (HD) techniques that best remove molecules in the middle to high molecular weight range are on-line hemodiafiltration (OL-HDF) and HD with medium cut-off (MCO) membranes. The aim of this study was to compare efficacy and safety of OL-HDF with FxCordiax HDF 800™, with HD with 2 MCO dialyzers: Theranova 500® and the new Elisio 21HX™ dialyzer. METHODS: Fourteen patients following treatment with OL-HDF using FxCordiax HDF 800™ were randomized to receive a consecutive 1-week HD treatment with Theranova 500® and Elisio 21HX™.The reduction rate (RR) of differently sized molecules was compared, as well as the variation rate in molecules smaller than 1000, detected by nuclear magnetic resonance based chemometrics (metabolomics). Albumin loss in dialysate was quantified. RESULTS: Lower RRs were found for molecules around 20 000 with Elisio 21HX™ compared to OL- HDF (RR prolactin 58.5% versus 66.7%, p = 0.034; RR Kappa light chain 63.1% versus 71.8%, p = 0.010). Albumin loss per session was higher with Theranova 500® than with OL-HDF and with Elisio 21HX™ (2249.9 ± 714.1 mg, 815.2 ± 474.0 mg, 442.9 ± 135.9 mg, p < 0.001, respectively). Metabolomic studies suggested, by semi-quantitative analysis, a greater depurative capacity of OL-HDF, followed by Elisio 21HX™, and then Theranova 500®. CONCLUSIONS: In this study, HD with Theranova 500® has proven to be very similar in efficacy to OL-HDF, although with a significantly higher albumin loss. HD with Elisio 21HX™ resulted in lower removal of molecules around 20 000 compared to OL-HDF, with no significant difference compared to Theranova 500®, and with less albumin loss than Theranova 500®.

[Public Resistance to Vaccination During Epidemics: The Example of COVID-19Resistência da população à vacinação em tempos de epidemias: sobre a COVID-19]. / Resistencia de la población hacia la vacunación en época de epidemias: a propósito de la COVID-19.

Objective: This article presents the findings of a review of the literature on public resistance to vaccines and the main factors that have influenced their decisions about immunoprevention, with a focus on the COVID-19 pandemic. Methods: We searched the literature using the terms DeCs/MeSH, anti-vaccination movement, vaccination refusal, epidemics, COVID-19, and impacts on health, using the Boolean operators OR and AND in Google Scholar, Medline, Lilacs, and Ibecs. Documents from official sources were also considered. Results: Throughout history, since vaccination began, people have had controversial perceptions of the procedure: some accept what the health authorities recommend, and others allege hidden intentions behind immunization. The COVID-19 vaccine against SARS-CoV-2 has been no exception. Conclusions: Vaccination has been one of the greatest scientific achievements in public health. However, despite its benefits, it has raised fear, uncertainty, and suspicion in the population. For this reason, it is important to increase health education actions in the population-with clear, concise, understandable information that is based on reliable and truthful sources-in order to reduce resistance to vaccination and address preventable diseases.

Objetivo: Este artigo busca apresentar os achados de uma revisão da literatura sobre a resistência da população às vacinas e os principais motivos que influenciaram suas decisões em relação à imunoprevenção, com foco na pandemia de COVID-19. Métodos: Foi realizada uma busca na literatura utilizando os termos DeCs/MeSH anti-vaccination movement, vaccination refusal, epidemics, COVID-19 e impacts on health, relacionados entre si pelos operadores booleanos OR e AND, no Google Scholar, MEDLINE, LILACS e IBECS. Documentos de fontes oficiais também foram levados em consideração. Resultados: Ao longo da história, desde o início da vacinação, a percepção das pessoas em relação a esse procedimento foi controversa. Há quem aceite o que as autoridades de saúde recomendam e quem alegue intenções ocultas por trás da imunização. A vacina contra o SARS-CoV-2, que causa a COVID-19, não foi exceção. Conclusões: A vacinação tem sido uma das maiores conquistas científicas em termos de saúde pública ­ um avanço que, apesar de seus benefícios, tem causado medo, incerteza e desconfiança na população. Por isso, é importante aumentar as ações de educação em saúde para a população, com informações claras, concisas e compreensíveis, baseadas em fontes confiáveis e verídicas, a fim de diminuir a resistência à vacinação e evitar doenças preveníveis.

Resistencia de la población hacia la vacunación en época de epidemias: a propósito de la COVID-19

[RESUMEN]. Objetivo. El presente artículo busca exponer los hallazgos de una revisión de la literatura sobre la resistencia de la población frente a las vacunas y las principales razones que han influido en sus decisiones hacia a la inmunoprevención, con foco en la pandemia de la COVID-19. Métodos. Se realizó una búsqueda en la literatura utilizando los términos DeCs/MeSH, Anti-Vaccination Movement, Vaccination refusal, Epidemics, COVID-19, Impacts on health, relacionados entre ellos por los operadores booleanos OR y AND en Google Scholar, Medline, Lilacs e Ibecs; también se tuvieron en cuenta documentos de fuentes oficiales. Resultados. A lo largo de la historia, desde el inicio de la vacunación, la percepción de las personas hacia este procedimiento ha sido controversial, hay quienes aceptan lo que las autoridades sanitarias recomiendan y quienes alegan intenciones ocultas detrás de la inmunización; la vacuna contra el SARS-CoV-2 causante de la COVID-19 no ha sido la excepción. Conclusiones. La vacunación ha sido uno de los mayores logros científicos en términos de salud pública, un avance que, a pesar de sus beneficios, ha causado miedo, incertidumbre y suspicacias en la población. Por esta razón, resulta importante incrementar las acciones de educación para la salud en la población, con infor- mación clara, concisa y comprensible, y sustentada en fuentes confiables y verídicas, con el fin de disminuir la resistencia a la vacunación y evitar las enfermedades prevenibles.

[ABSTRACT]. Objective. This article presents the findings of a review of the literature on public resistance to vaccines and the main factors that have influenced their decisions about immunoprevention, with a focus on the COVID-19 pandemic. Methods. We searched the literature using the terms DeCs/MeSH, anti-vaccination movement, vaccination refusal, epidemics, COVID-19, and impacts on health, using the Boolean operators OR and AND in Google Scholar, Medline, Lilacs, and Ibecs. Documents from official sources were also considered. Results. Throughout history, since vaccination began, people have had controversial perceptions of the pro- cedure: some accept what the health authorities recommend, and others allege hidden intentions behind immunization. The COVID-19 vaccine against SARS-CoV-2 has been no exception. Conclusions. Vaccination has been one of the greatest scientific achievements in public health. However, despite its benefits, it has raised fear, uncertainty, and suspicion in the population. For this reason, it is import- ant to increase health education actions in the population—with clear, concise, understandable information that is based on reliable and truthful sources—in order to reduce resistance to vaccination and address pre- ventable diseases.

[RESUMO]. Objetivo. Este artigo busca apresentar os achados de uma revisão da literatura sobre a resistência da popu- lação às vacinas e os principais motivos que influenciaram suas decisões em relação à imunoprevenção, com foco na pandemia de COVID-19. Métodos. Foi realizada uma busca na literatura utilizando os termos DeCs/MeSH anti-vaccination movement, vaccination refusal, epidemics, COVID-19 e impacts on health, relacionados entre si pelos operadores bool- eanos OR e AND, no Google Scholar, MEDLINE, LILACS e IBECS. Documentos de fontes oficiais também foram levados em consideração. Resultados. Ao longo da história, desde o início da vacinação, a percepção das pessoas em relação a esse procedimento foi controversa. Há quem aceite o que as autoridades de saúde recomendam e quem alegue intenções ocultas por trás da imunização. A vacina contra o SARS-CoV-2, que causa a COVID-19, não foi exceção. Conclusões. A vacinação tem sido uma das maiores conquistas científicas em termos de saúde pública um avanço que, apesar de seus benefícios, tem causado medo, incerteza e desconfiança na população. Por isso, é importante aumentar as ações de educação em saúde para a população, com informações claras, concisas e compreensíveis, baseadas em fontes confiáveis e verídicas, a fim de diminuir a resistência à vacinação e evitar doenças preveníveis.

Development of a low-cost IoT system based on LoRaWAN for monitoring variables related to electrical energy consumption in low voltage networks.

Energy efficiency is an issue that is currently gaining relevance, high electricity demands worldwide generate a negative impact on the planet caused by the natural depletion of resources associated with production processes. In this regard, the technologies associated with the Internet of Things (IoT) are considered as a tool to optimize processes and resources through the monitoring of variables. In this context, this work proposes a low-cost electronic system with IoT architecture used in the monitoring of electrical variables, this becomes a support tool in the estimation of energy consumption in internal distribution electrical circuits of homes or small industries. This device generates information to recognize consumption patterns and load balances per electrical phase, contains two hardware modules and a software user interface. The first is an electronic node that includes a high-performance polyphase meter based on the Atmel M90E32AS chip, which is controlled by an ESP32 chip, for wireless communication is used a Radio Frequency (RF) module in the 915 MHz band and LoRa protocol based on the Semtech SX1278 transceiver, this node is able to measure and transmit variables such as current, voltage, active energy, reactive energy, power factor and other electrical variables in circuits of up to three phases. For the study, a calibration process was carried out in an accredited laboratory (Metrex S.A. in Colombia), then tests were performed by monitoring a three-phase 110V electrical circuit in a small factory, with the information generated it was possible to identify consumption patterns over a period of seven consecutive days, important data such as times when energy is wasted due to improper use of loads connected to the network, electric stoves, computer equipment turned on during non-working hours are examples of the results obtained.

Effect of Methyl Jasmonate in Gene Expression, and in Hormonal and Phenolic Profiles of Holm Oak Embryogenic Lines Before and After Infection With Phytophthora cinnamomi.

The dieback syndrome affecting Quercus ilex and other oak species impels the search for tolerant plant genotypes, as well as methods of plant immunization against such infections. Elicitation treatments can be an effective strategy to activate plant defense response and embryogenic lines represent a promising tool to generate new tolerant genotypes and also to study early markers involved in defense response. The aim of the presented work was to investigate changes in gene expression, and in hormonal and phenolic profiles induced in three holm oak embryogenic lines (ELs) elicited with methyl jasmonate (MeJA) before and after infection with the oomycete Phytophthora cinnamomi, which is the main biotic agent involved in this pathogenic process. The three ELs, derived from three genotypes, showed different basal profiles in all tested parameters, noting that the VA5 naïve genotype from a scape tree was characterized by a basal higher expression in NADPH-dependent cinnamyl alcohol dehydrogenase (CAD) and chalcone synthase (CHS) genes and also by higher caffeic acid content. Our work also identifies changes triggered by MeJA elicitation in holm oak embryogenic lines, such as increases in ABA and JA contents, as well as in levels of most of the determined phenolic compounds, especially in caffeic acid in Q8 and E00 ELs, but not in their biosynthesis genes. Irrespective of the EL, the response to oomycete infection in holm oak elicited plant material was characterized by a further increase in JA. Since JA and phenols have been described as a part of the Q. ilex defense response against P. cinnamomi, we propose that MeJA may act as an induced resistance (IR) stimulus and that in our embryogenic material induced both direct (detected prior to any challenge) and primed (detected after subsequent challenge) defense responses.

Changing Temperature Conditions during Somatic Embryo Maturation Result in Pinus pinaster Plants with Altered Response to Heat Stress.

Under the global warming scenario, obtaining plant material with improved tolerance to abiotic stresses is a challenge for afforestation programs. In this work, maritime pine (Pinus pinaster Aiton) plants were produced from somatic embryos matured at different temperatures (18, 23, or 28 °C, named after M18, M23, and M28, respectively) and after 2 years in the greenhouse a heat stress treatment (45 °C for 3 h/day for 10 days) was applied. Temperature variation during embryo development resulted in altered phenotypes (leaf histology, proline content, photosynthetic rates, and hormone profile) before and after stress. The thickness of chlorenchyma was initially larger in M28 plants, but was significantly reduced after heat stress, while increased in M18 plants. Irrespective of their origin, when these plants were subjected to a heat treatment, relative water content (RWC) and photosynthetic carbon assimilation rates were not significantly affected, although M18 plants increased net photosynthesis rate after 10 days recovery (tR). M18 plants showed proline contents that increased dramatically (2.4-fold) when subjected to heat stress, while proline contents remained unaffected in M23 and M28 plants. Heat stress significantly increased abscisic acid (ABA) content in the needles of maritime pine plants (1.4-, 3.6- and 1.9-fold in M18, M23, and M28 plants, respectively), while indole-3-acetic acid content only increased in needles from M23 plants. After the heat treatment, the total cytokinin contents of needles decreased significantly, particularly in M18 and M28 plants, although levels of active forms (cytokinin bases) did not change in M18 plants. In conclusion, our results suggest that maturation of maritime pine somatic embryos at lower temperature resulted in plants with better performance when subjected to subsequent high temperature stress, as demonstrated by faster and higher proline increase, lower increases in ABA levels, no reduction in active cytokinin, and a better net photosynthesis rate recovery.

Hard tick species (Acari: Ixodidae) and infestation in two livestock agroecosystems from Antioquia, Colombia.

Tick infestation affects about 80% of livestock globally while transmitting various pathogens causing high economic losses. This study aimed to determine the degree of tick infestation in two regions, North and Middle Magdalena in Antioquia, Colombia, to identify the ixodid tick species found and the associated risk factors. A cross-sectional study was carried out in 48 farms distributed in six municipalities of Antioquia. Two paddocks and eight bovines per farm were evaluated to estimate tick infestation (adults, nymphs, and larvae). Tick species were identified through a morphological and molecular analysis based on partial sequences of data obtained from DNA molecular markers, two mitochondrial (16S rRNA and COI), and one genomic DNA gene (18S rRNA). A multivariate Poisson regression model was applied to estimate the associated risk factors with ticks in cattle. Rhipicephalus microplus, Amblyomma patinoi and Dermacentor nitens were present in the livestock agroecosystems in the Middle Magdalena region; the highest incidence of tick infestation in cows and paddocks was reported in the municipality of Puerto Triunfo. The livestock agroecosystems in Middle Magdalena were characterized by a higher presence of adult R. microplus in cattle. Larval infestation of R. microplus, followed by D. nitens, was also found in paddocks. The multivariate analysis showed that the origin of cattle was the main risk factor associated with the presence of ticks (i.e., when cattle came from outside the farm). Cattle movement between farms in Middle Magdalena can contribute to the spread of ticks in this region.

Resistencia de la población hacia la vacunación en época de epidemias: a propósito de la COVID-19 / Public Resistance to Vaccination During Epidemics: The Example of COVID-19 / Resistência da população à vacinação em tempos de epidemias: sobre a COVID-19

RESUMEN Objetivo. El presente artículo busca exponer los hallazgos de una revisión de la literatura sobre la resistencia de la población frente a las vacunas y las principales razones que han influido en sus decisiones hacia a la inmunoprevención, con foco en la pandemia de la COVID-19. Métodos. Se realizó una búsqueda en la literatura utilizando los términos DeCs/MeSH, Anti-Vaccination Movement, Vaccination refusal, Epidemics, COVID-19, Impacts on health, relacionados entre ellos por los operadores booleanos OR y AND en Google Scholar, Medline, Lilacs e Ibecs; también se tuvieron en cuenta documentos de fuentes oficiales. Resultados. A lo largo de la historia, desde el inicio de la vacunación, la percepción de las personas hacia este procedimiento ha sido controversial, hay quienes aceptan lo que las autoridades sanitarias recomiendan y quienes alegan intenciones ocultas detrás de la inmunización; la vacuna contra el SARS-CoV-2 causante de la COVID-19 no ha sido la excepción. Conclusiones. La vacunación ha sido uno de los mayores logros científicos en términos de salud pública, un avance que, a pesar de sus beneficios, ha causado miedo, incertidumbre y suspicacias en la población. Por esta razón, resulta importante incrementar las acciones de educación para la salud en la población, con información clara, concisa y comprensible, y sustentada en fuentes confiables y verídicas, con el fin de disminuir la resistencia a la vacunación y evitar las enfermedades prevenibles.

ABSTRACT Objective. This article presents the findings of a review of the literature on public resistance to vaccines and the main factors that have influenced their decisions about immunoprevention, with a focus on the COVID-19 pandemic. Methods. We searched the literature using the terms DeCs/MeSH, anti-vaccination movement, vaccination refusal, epidemics, COVID-19, and impacts on health, using the Boolean operators OR and AND in Google Scholar, Medline, Lilacs, and Ibecs. Documents from official sources were also considered. Results. Throughout history, since vaccination began, people have had controversial perceptions of the procedure: some accept what the health authorities recommend, and others allege hidden intentions behind immunization. The COVID-19 vaccine against SARS-CoV-2 has been no exception. Conclusions. Vaccination has been one of the greatest scientific achievements in public health. However, despite its benefits, it has raised fear, uncertainty, and suspicion in the population. For this reason, it is important to increase health education actions in the population—with clear, concise, understandable information that is based on reliable and truthful sources—in order to reduce resistance to vaccination and address preventable diseases.

RESUMO Objetivo. Este artigo busca apresentar os achados de uma revisão da literatura sobre a resistência da população às vacinas e os principais motivos que influenciaram suas decisões em relação à imunoprevenção, com foco na pandemia de COVID-19. Métodos. Foi realizada uma busca na literatura utilizando os termos DeCs/MeSH anti-vaccination movement, vaccination refusal, epidemics, COVID-19 e impacts on health, relacionados entre si pelos operadores booleanos OR e AND, no Google Scholar, MEDLINE, LILACS e IBECS. Documentos de fontes oficiais também foram levados em consideração. Resultados. Ao longo da história, desde o início da vacinação, a percepção das pessoas em relação a esse procedimento foi controversa. Há quem aceite o que as autoridades de saúde recomendam e quem alegue intenções ocultas por trás da imunização. A vacina contra o SARS-CoV-2, que causa a COVID-19, não foi exceção. Conclusões. A vacinação tem sido uma das maiores conquistas científicas em termos de saúde pública - um avanço que, apesar de seus benefícios, tem causado medo, incerteza e desconfiança na população. Por isso, é importante aumentar as ações de educação em saúde para a população, com informações claras, concisas e compreensíveis, baseadas em fontes confiáveis e verídicas, a fim de diminuir a resistência à vacinação e evitar doenças preveníveis.

Effect of Feed Supplementation with Clostridium butyricum, Alone or in Combination with Carob Meal or Citrus Pulp, on Digestive and Metabolic Status of Piglets.

This work studied the effects of the inclusion of Clostridium butyricum on feed, alone or with carob meal or citrus pulp, on the digestive and metabolic status of weaned piglets. A total of 30 male piglets (weaned at 21 days) is used. There are five dietary treatments: negative without ZnO at high doses (C-), a positive control supplemented with ZnO at 2500 ppm of Zn (C+), supplemented with Clostridium butyricum as a probiotic (PRO), and supplemented with probiotic and 5% carob meal (PROC) or 5% citrus pulp (PROP). During the experiment (27 days), the piglets were periodically weighed and sampled for a serum biochemical, fecal microbiological, intestine histological, and digestive status analysis. The body weight, apparent ileal digestibility of dry matter (DM), and fecal microbiology were not affected by the treatments (p ≥ 0.05). However, the apparent fecal digestibility of DM was lower for the C- treatment than for C+ (p < 0.05), and the total concentration of volatile fatty acids (VFAs) in feces with C+ was lower than that for the PROC treatment (p < 0.05). The treatments with the probiotic had a higher molar proportion of butyric acid in feces than C+, and it was found that C- reached an intermediate value (p < 0.01). No general effects of diet were found on the histological measures performed on the jejunum and ileum, and in the serum biochemical analysis (p ≥ 0.05), only the concentration of interleukin-8 was lower for the PROC treatment compared to the C-, C+, and PRO treatments (p < 0.05). In conclusion, the intestinal wellness of piglets could be improved with the supplementation of Clostridium butyricum by increasing butyric acid, and this effect was not altered with the inclusion of carob meal or citrus pulp. More studies under commercial conditions are needed, as the effects might be different in more challenging environmental circumstances.

Influence of metabolic syndrome on post-stroke outcome, angiogenesis and vascular function in old rats determined by dynamic contrast enhanced MRI.

Stroke affects primarily aged and co-morbid people, aspects not properly considered to date. Since angiogenesis/vasculogenesis are key processes for stroke recovery, we purposed to determine how different co-morbidities affect the outcome and angiogenesis/vasculogenesis, using a rodent model of metabolic syndrome, and by dynamic enhanced-contrast imaging (DCE-MRI) to assess its non-invasive potential to determine these processes. Twenty/twenty-two month-old corpulent (JCR:LA-Cp/Cp), a model of metabolic syndrome and lean rats were used. After inducing the experimental ischemia by transient MCAO, angiogenesis was analyzed by histology, vasculogenesis by determination of endothelial progenitor cells in peripheral blood by flow cytometry and evaluating their pro-angiogenic properties in culture and the vascular function by DCE-MRI at 3, 7 and 28 days after tMCAO. Our results show an increased infarct volume, BBB damage and an impaired outcome in corpulent rats compared with their lean counterparts. Corpulent rats also displayed worse post-stroke angiogenesis/vasculogenesis, outcome that translated in an impaired vascular function determined by DCE-MRI. These data confirm that outcome and angiogenesis/vasculogenesis induced by stroke in old rats are negatively affected by the co-morbidities present in the corpulent genotype and also that DCE-MRI might be a technique useful for the non-invasive evaluation of vascular function and angiogenesis processes.

Post-stroke Neurogenesis: Friend or Foe?

The substantial clinical burden and disability after stroke injury urges the need to explore therapeutic solutions. Recent compelling evidence supports that neurogenesis persists in the adult mammalian brain and is amenable to regulation in both physiological and pathological situations. Its ability to generate new neurons implies a potential to contribute to recovery after brain injury. However, post-stroke neurogenic response may have different functional consequences. On the one hand, the capacity of newborn neurons to replenish the damaged tissue may be limited. In addition, aberrant forms of neurogenesis have been identified in several insult settings. All these data suggest that adult neurogenesis is at a crossroads between the physiological and the pathological regulation of the neurological function in the injured central nervous system (CNS). Given the complexity of the CNS together with its interaction with the periphery, we ultimately lack in-depth understanding of the key cell types, cell-cell interactions, and molecular pathways involved in the neurogenic response after brain damage and their positive or otherwise deleterious impact. Here we will review the evidence on the stroke-induced neurogenic response and on its potential repercussions on functional outcome. First, we will briefly describe subventricular zone (SVZ) neurogenesis after stroke beside the main evidence supporting its positive role on functional restoration after stroke. Then, we will focus on hippocampal subgranular zone (SGZ) neurogenesis due to the relevance of hippocampus in cognitive functions; we will outline compelling evidence that supports that, after stroke, SGZ neurogenesis may adopt a maladaptive plasticity response further contributing to the development of post-stroke cognitive impairment and dementia. Finally, we will discuss the therapeutic potential of specific steps in the neurogenic cascade that might ameliorate brain malfunctioning and the development of post-stroke cognitive impairment in the chronic phase.