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Parasite biodiversity is underestimated or unknown in many regions, yet information on parasites is critical to understanding ecosystem structure and how this will change into the future. Understanding the diversity and role of parasites is especially important in regions exposed to anthropogenic pressures, such as aquatic ecosystems, as their interactions with other stressors can either exacerbate or mediate negative impacts. Water scarcity in the Brazilian semi-arid has led to a proliferation of reservoirs for human use. These artificial waterbodies host a diversity of taxa, including a large number of fish species; however, fish parasite diversity remains undocumented. This study investigated the parasitological diversity of fishes from reservoirs in the Paraíba and Mamanguape River basins in the Caatinga domain, Brazil – one of the most populated semi-arid regions worldwide. Eight reservoirs were studied, with fish sampled across the two phases of the hydrological cycle (dry and rainy seasons) using gillnets, cast nets, and trawl nets. Endo- and ecto-parasites were identified and enumerated, and parasitological indices (prevalence, intensity, and abundance) were calculated. In total, 1,170 individuals of 21 fish species were examined. Of these individuals, 42% were parasitized with at least one of 54 parasite taxa. We recorded 32 new geographical occurrences of parasites and 23 new fish-parasite interactions, expanding our understanding of ichthyoparasite diversity in the Brazilian semi-arid. Moving forward, it is important to develop knowledge around how anthropogenic changes (e.g., biological invasions, climate, and land use change) influence host-parasite structure and dynamics and ecosystem functioning in these ecosystems.
Aplectana membranosa is a cosmocercid nematode that shows affinity with various amphibian and reptile hosts, being considered a generalist species. To date, no studies have investigated the influence of host and locality in the morphological variation of this species. Thus, we analysed morphological and morphometric characters of 260 specimens of A. membranosa collected from 9 host species and 7 different localities. To complement the metric studies, we conducted phylogenetic analyses using the ribosomal genes 28S and internal transcript spacer 1 (ITS1) to determine the phylogenetic position of the species and its divergence. In the present study, it was possible to observe the cloacal papillae pattern of the species through scanning electron microscopy, and we found no morphological variation in the specimens of A. membranosa from various hosts in different localities in Brazil. The study showed low variation in all data. However, despite the low variation, we found that external environmental conditions, such as climate and latitude, influence its variation. Molecular analyses highlighted that the separation of Cosmocercidae members may be related to geographic distribution and population genetic divergence. Thus, the results illustrated in this study reiterate the importance of using integrative data to better elucidate the family’s taxonomic and evolutionary history.
Electroconvulsive therapy (ECT) is a safe and effective treatment for several major psychiatric conditions, including treatment-resistant depression, mania, and schizophrenia; nevertheless, its use remains controversial. Despite its availability in some European countries, ECT is still rarely used in others. This study aims to investigate the experiences and attitudes of early career psychiatrists (ECPs) across Europe towards ECT and to examine how their exposure to ECT influences their perceptions.
Methods
In Europe, a cross-sectional survey was conducted among ECPs, including psychiatric trainees and recently fully qualified psychiatrists.
Results
A total of 573 participants from 30 European countries were included in the study, of whom more than half (N = 312; 54.5%) received ECT training. Overall, ECPs had a positive attitude towards ECT, with the vast majority agreeing or strongly agreeing that ECT is an effective (N = 509; 88.8%) and safe (N = 464; 81.0%) treatment and disagreeing or strongly disagreeing that ECT was used as a form of control or punishment (N = 545; 95.1%). Those who had received ECT training during their psychiatry training were more likely to recommend ECT to their patients (p < 0.001, r = 0.34), and held more positive views on its safety (p < 0.001, r = 0.31) and effectiveness (p < 0.001, r = 0.33). Interest in further education about ECT was moderately high (modal rating on Likert scale: 4, agree), irrespective of prior training exposure.
Conclusions
ECT training is associated with more favorable perceptions of its safety and effectiveness among ECPs. There is a general willingness among ECPs to expand their knowledge and training on ECT, which could enhance patients’ access to this treatment.
Background: The Cognitive Domains and Functional Assessment Questionnaire (CDFAQ) assess cognitive and functional decline based on the DSM-5 criteria for Neurocognitive Disorders. Its accuracy has been assessed and was translated and validated into English. The informant version (CDFAQ-IV) is a 30-item questionnaire that assesses six cognitive domains with 5 items each: Complex Attention (CA), Executive Functions (EF), Learning and
Memory (LM), Language (L), Perceptual-Motor (PM) and Social Cognition. The development of CDFAQ-IV was based on theDSM-5 cognitive domains, but its factor analysis has not been done yet.
Objectives: To perform a Confirmatory Factor Analysis of the CDFAQ-IV to assess the six-factor cognitive domain model.
Methods: Older adults and their informants were invited to participate in this study. The CDFAQ-IV was applied in 292 older adults’ informants. We used the JASP for a Confirmatory Factor Analysis based on Lavaan R Packages. The confirmatory factor analysis was chosen to manual six-factor model. This study was approved by the ethics committee of UFMG.
Results: Concerning model fitness in the confirmatory factor analysis the X2 was significant (p < .001), standardized root mean square residual (SRMR) was .059 (accepted < .08) and the goodness of fit index (GFI) .984 (accepted > .9). However, the root mean square error of approximation (RMSEA) was marginal to the accepted fitness .066 (accepted < .06) and the comparative fit index CFI was .839 under the accepted cutoff (accepted > .9).
Conclusions: The six-factor model of the showed a good fit for three parameters, marginal for one and negative for the CFI. These results point to a convergence of the questionnaire and factors the DSM-5 cognitive domains. These are still preliminary results and we aim to increase our sample to further assess the confirmatory factor analysis.
An example of the unification of the contrast between artistic creativity and discipline of science, Nikola Tesla engineer and physicist, was also a prolific inventor that contributed to the transformation of modern society. Having resurfaced in the mainstream culture as a mythical figure, he appears to be enjoying a renaissance of posthumous recognition and praise. Throughaccounts available directly from his autobiography and descriptions offered by those who worked with him, the existence of the inventor´s eccentricities appear to reveal the existence of mental health disorder.
Objectives
The authors explore Tesla and the psychopathology that accompanied him throughout his periods of brilliance and as well as hardship.
Methods
The authors conducted a brief non-structured narrative literature review. The keywords used during the research, alone or in combination, included: Nikola Tesla, psychopathology and mental illness. The works consulted included: news articles, autobiographies and biographies. Of these, those that were written in the English language and deemed most pertinent to the explored theme were chosen for review in this work.
Results
The popular image of the mad scientist, which describes a brilliant but solitary and eccentric individual focused on their work is one that could be applied to Tesla. Documents reveal that he suffered a nervous breakdown, as well as having symptoms that point to a probably presence of obsessive-compulsive disorder, of which included counting and cleanliness rituals, exacerbated by chronic insomnia.
Conclusions
There appears to be anecdotal evidence pointing to an eventual relationship between creative genius and mental pathology. Although not formally evidenced through the scientific literature, exploring the life and accomplishments of Tesla serve as a significant example of a spark of genius perhaps ignited by mental illness. Tesla demonstrated suffering associated with his symptoms especially when considering the end of his life. At the time, adequate mental health interventions and treatments were not widely available, with his diagnosis probably being considered the quirks of genius and not the symptoms of disease.
Epilepsy is one of the most common serious brain illness, with symptoms influenced by multiple risk factors and a strong genetic predisposition, rather than having a single expression and cause¹. Neuropsychiatric symptoms in epilepsy can encompass manifestations such as mood alterations, anxiety, sleep disturbances, psychosis, and behavioral disorders. While the motor and sensory manifestations of epileptic seizures are widely recognized, neuropsychiatric symptoms accompanying epilepsy are often underestimated. Therefore, it is essential to understand the most prevalent epidemiological profile of these patients to improve the diagnosis and management of these symptoms.
Objectives
Our goal was to evaluate the neuropsychiatric behavior of epilepsy patients in Brazilian over the past 3 years through hospitalization data in order to outline an epidemiological and behavioral profile.
Methods
A cross-sectional, descriptive, retrospective, and quantitative study was conducted on hospitalizations of individuals simultaneously diagnosed with epilepsy, schizotypal and delusional disorders, and mood disorders in all five regions of Brazil (South, Southeast, Midwest, North, and Northeast) between February 2020 and December 2022. Data from January 2020 were not available. The data used were collected through the Department of Health Informatics of the Brazilian Unified Health System (DATASUS) in the “Hospital Information System of SUS” section, gathering information regarding the nature of care, age range, gender, and ethnicity of the patients.
Results
The analysis covers the years 2020 to 2022, totaling 503,045 hospitalizations. In 2022, the highest number of cases occurred (≈ 37.55%), followed by 2021 (≈ 33.62%) and 2020 (≈ 28.81%). Urgent hospitalizations represented ≈ 90.85% of the total. The most affected age group was 30 to 39 years old (≈ 18.30%). Men were more affected than women (≈ 52.03% and ≈ 47.96%, respectively), and Caucasians accounted for ≈ 36.07% of the hospitalizations. The average length of stay was 19.1 days, and the mortality rate was 1.4%.
Conclusions
Thus, there is a gradual and annual increase in the number of hospitalizations during the observed period. While there is a minimal disparity between the affected genders, it is evident that the profile of male, caucasian, and adult patients is the most prevalent. Moreover, the predominantly urgent nature of hospitalizations points to an alarming scenario regarding this issue. From the analysis of the data obtained in the study, there is a clear need for interventions capable of reducing the prevalence of hospitalizations for neuropsychiatric symptoms in epilepsy patients in Brazil.
Neuropsychiatric disorders are the leading cause of disability worldwide, as seen in cases such as depression, anxiety, bipolar mood disorder and schizophrenia, which can be developed or exacerbated by the use of psychoactive substances. Most mental disorders have an early onset, often leading to early and/or permanent disability, increasing the need and cost of healthcare. Therefore, it is necessary to improve the identification of the epidemiological profile of these cases in the South of Brazil in order to enhance the diagnosis and reduce the costs associated with managing these disorders.
Objectives
The present study aimed to analyze statistical data regarding hospitalizations related to mental disorders caused by the use of psychoactive substances and alcohol in the southern region of Brazil, highlighting the pathological scenario and identifying the most prevalent profiles of these disorders in this region.
Methods
A cross-sectional, descriptive, retrospective, and quantitative study was conducted on hospitalizations of individuals diagnosed with mental and behavioral disorders due to the use of psychoactive substances and alcohol in the states of the Southern region of Brazil (Paraná, Santa Catarina, and Rio Grande do Sul) between February 2020 and December 2022. Data of January 2020 were not available. The data used were collected through the Department of Health Informatics of the Brazilian Unified Health System (DATASUS) in the “Hospital Information System of SUS” section, gathering information regarding the nature of the care, age range, gender, and ethnicity of the patients.
Results
The study covers the years 2020 to 2022, indicating a total of 81,608 hospitalizations, with the year 2022 having the highest number of cases (≈ 37.13%), followed by 2021 (≈ 33.30%) and 2020 (≈ 29.55%). The states with the highest number of hospitalizations were Rio Grande do Sul (≈ 54.90%), Paraná (≈ 29.29%), and Santa Catarina (≈ 15.79%). Urgent hospitalizations accounted for ≈ 87.29% of the total. The most affected age group was 30 to 39 years old (≈ 25.61%). Men were more affected than women (≈ 81.70% and ≈ 18.28%, respectively). Caucasians accounted for ≈ 64.29% of the hospitalizations. The average length of stay was 20.8 days, and the mortality rate was 0.32%.
Conclusions
There is a clear increase in the number of hospitalizations related to mental disorders caused by the use of psychoactive substances in the period from 2020 to 2022 in the southern region of Brazil, with the highest number of cases in the state of Rio Grande do Sul. The most affected population consisted of Caucasian men aged 30 to 39 years old. Furthermore, these results may be related to the increasing trend of psychoactive substance use among the Brazilian population and also the COVID-19 pandemic, which led to a period of underreporting due to social isolation.
Schizophrenia is a complex psychiatric disorder in which biological sex differences, have been extensively documented and researched. What is less well described, is what motivates these differences. Of the various proposed and explored reasons, estrogen appears to be one that has maintained some interest and promise. An increase in symptoms of schizophrenia has been observed to correspond with decreasing levels of estrogen in menopausal women, this, allied to the later symptom onset, culminated in the interest in this hormone and its role in psychotic illness.
Objectives
The authors aim to briefly explore the current evidence on the association between estrogen and schizophrenia. Its relevance in symptom onset, protective status and eventual therapeutic applications will also be discussed.
Methods
The authors conducted a brief non-structured narrative literature review using articles published in the Medline/Pubmed, ScienceDirect and Google Scholar databases. The keywords used during the research, alone or in combination, included: sex hormones, estrogen, schizophrenia and psychiatry.The studies consulted in this work included: cross-sectional studies, cohort studies, literature reviews and clinical case reports.
Results
The literature exploring the relationship between the sex hormone, estrogen, and schizophrenia is extensive. Various studies confirm that during periods of estrogen withdrawal, women appear more susceptible to psychotic episodes. Results also demonstred that those with low estrogen, respond poorly to anti-psychotic drugs, whereas estrogen increased the efficiency of antipsychotics. In regards to symptoms, estrogen has been demonstrated to reduce the positive and cognitive symptoms of schizophrenia in the short term, thus being proposed as an eventual complementary treatment in those suffering from the disorder. It is known that estrogen regulates important pathophysiological pathways in schizophrenia, including dopamine activity, mitochondrial function, and the stress system.One of the explanations for this beneficial effect has been proposed to be action on cerebral blood flow and glucoce metabilism, as well as sensitizing postsynaptic dopamine receptors, thus serving as a protective agent against schizophrenia.
Conclusions
The research appears to be pointing in the direction that estrogen appears to have an effect on psychosis in women, serving as a protective factor in these conditions as well as playing a significant part of the pathophysiology in schizophrenia. This influence on the pathophysiology, promises clinical pertinence, not only in a possible application so to attenuate positive and cognitive symptoms but also as a method to influence antipsychotic efficacy. Continued study in regards to the effects of sex hormones on the psychotic disorders is merited so as to further expand the tools in the mental health professional’s repertoire in the treatment of these serious mental illnesses.
Shakespeare wrote that “We are such stuff as dreams are made on; and our little life is rounded with a sleep.” Sleep is a fundamental part of our being, so much so, humans tend to spend one third of their lives in this immobile and vulnerable state. Disorders of sleep have been the target of much scientific curiosity and investigation, with inumerous articles, reports and books dedicated to the theme. The bidirectional relationship between psychiatric disorders and those of sleep is also well described. Schizophrenia is a heterogenous psychiatric disorder which is often associated with sleep disturbances of various kinds.
Objectives
The authors aim to briefly explore the relationship between schizophrenia and sleep disturbances. Potential underlying mechanisms and risk factors, as well as therapeutic interventions will be addressed.
Methods
The authors conducted a brief non-structured narrative literature review using articles published in the Medline/Pubmed, ScienceDirect and Google Scholar databases. The keywords used during the research, alone or in combination, included: sleep disturbance, sleep disorder and schizophrenia.The studies consulted in this work included: cross-sectional studies, cohort studies, literature reviews and clinical case reports. Works that were included, were written in the English language and deemed as pertinent to the explored theme.
Results
Although sleep disturbances do not make up part of the criteria formal diagnosis of schizophrenia, they are present in approximately 80% of those with the condition and have been identified as a common symptom in prodromic clinical pictures. The problems in sleep are as heterogenous as the presentations in schizophrenia, ranging from insomnia, restless legs syndrome, obstructuve sleep apnea, circadian rhythm disfunctions to hypersomnia. Sleep has been identified as fundamental for the reparation and restoration of various bodily systems, it is no surprise that sleep irregularities, especially in schizophrenia, can significantly reduce quality of life and promote deterioration. Some studies have stated the role that D2 receptors have in the classic symptoms of schizophrenia as well as on sleep disturbances. Second-generations antipsychotics have not only demonstrated much promise on psychotic symptoms, but they appear to aid in sleep regulation and quality.
Conclusions
Sleep is fundamental for mental health. Various sleep disturbances have been identified in those suffering with schizophrenia. Slepe disturbances have been associated with worse outcomes, more florid clinical pictures and significant deterioration. Thus, bettering sleep quality in these patients, would permit better health outcomes which are fundamental in those who live with schizophrenia.
In recent years, mental health has gained prominence in public health, prompting thorough investigations into psychiatric condition trends. This study conducts a comprehensive epidemiological analysis of hospitalizations for Schizophrenia, Schizotypal, and Delirium Disorders in Rio Grande do Sul (RS) over the past five years. By revealing these patterns, it enhances our understanding of regional mental health dynamics and offers insights for intervention strategies, resource planning, and improved mental healthcare. The ultimate goal is to advance more effective and accessible mental healthcare in RS and beyond.
Objectives
This study aims to analyze the prevalence and epidemiological profile of hospitalizations due to psychiatric disorders to assist in the diagnosis and outcome of affected patients.
Methods
A cross-sectional, descriptive, retrospective, and quantitative study was conducted regarding hospitalizations for Schizophrenia, Schizotypal Disorders, and Delirium in the state of RS between January 2018 and November 2022. Data were collected from the Department of Informatics of the Brazilian Unified Health System (DATASUS) in the “Hospital Information System of SUS” section, focusing on the nature of care, age group, gender, and ethnicity of the patients. The information was aggregated over the five-year period based on the four mentioned descriptors and subsequently analyzed to establish a profile of hospitalizations during that period.
Results
The analysis spans from 2018 to 2022, encompassing a total of 28,345 hospitalizations. In 2019, there was the highest number of cases (22.21%), followed by 2018 (21.08%). Urgent care admissions constituted 85.34% of the total. The age group most affected was 35 to 39 years (11.8%). Men were more affected than women (60.18%), and the majority of hospitalizations were among the Caucasian ethnicity (75.12%). The average length of stay was 23.7 days, and the mortality rate stood at 0.26%.
Conclusions
The increasing trend in hospitalizations, peaking in 2019, highlights the need for preventive measures. Urgent admissions (85.34%) underscore the demand for accessible mental health resources. Men in the 35 to 39 age group are disproportionately affected, suggesting specific risk factors. The predominance of Caucasian ethnicity emphasizes the need for culturally sensitive care. A longer average length of stay (23.7 days) underscores treatment complexity, while a low mortality rate (0.26%) signals effective medical care. In essence, these findings inform tailored mental health policies to enhance service quality and prioritize patient-centered approaches.
Questions regarding death have generated debates and art since the dawn of civilization. These themes permeate through various areas of study, including religion, philosophy, ethics, medicine and humanities. Various countries have been revising their laws regarding the end of life, especially on the right to aid and choice in the end in the context of medical and phychological suffering. Physician-Assisted Suicide (PAS) and euthanasia are methods by which people, mostly terminal patients, seek to end their lives with the help of medical professionals. PAS and euthanasia have been the target of heated debates in politics and in medicine, with the question of ethics centering most of these.
Objectives
The authors aim to explore PAS and euthanasia in the context of the ethical debate. Based on the pillars of ethics, based on the principal of do no harm and beneficence, the authors explore the role of the Psychiatrist, if any, in these end of life issues.
Methods
The authors performed a brief narrative review of the available literature, with recourse to various databases such as PubMed and Scopus. The search terms utilized in isolation or combination included: physician assisted suicide, euthanasia, psychiatry, mental illness and ethical issues. Taking into consideration the widespread discussion of these themes in the public forum, news articles were included based on their merit and relevance to the explored topic.
Results
The ethical debate appears to rest between the pillars of first, do no harm, the principles of beneficence and nonmaleficence and aut. Here, the conflict between the first and last appear, where the killing of any patient, whether directly or indirectly is clearly contrary to the principle of primum non nocere. However, the prolonging of suffering in a terminal patient, appears to contradict the principles of nonmaleficence. The Psychiatrist is called to evaluate competence to choose, which is allied to autonomy. Other sources explore the role of the Psychiatrist in permitting a suicide to occur, when the profession is dedicated to the prevention of suicide. From the literature, the psychiatric evaluation is rarely regularly carried out, usually being solicited in cases where mental illness which might compromise the capacity to choose is suspected.
Conclusions
In ethical debates, clear cut answers are rarely every developed, with the nuance and greyscale of difficult topics usually dividing those that ferverantly champion each cause. Psychiatric evaluation is usually invoked when patient autonomy, especially in terms of capacity, is called into question. Questions remain as to whether the presence of the psychiatrist should be a regular one in these procedures or if it should be carried out in a selective manner. There is little consensus in regards to this role, which merits further conversation in the various forums of medical and ethical communication.
Direct numerical simulations of channel flow and temporal boundary layer at a Reynolds number $Re_{\tau } = 1500$ are used to assess the scale-by-scale mechanisms of wall turbulence. From the peak of turbulence production embedded at the small scales of the near-wall region, spatially ascending reverse cascades are generated that move through self-similar eddies growing in size with the wall distance. These fluxes are followed by spatially ascending forward cascades through detached eddies thus reaching sufficiently small scales where eventually scale energy is dissipated. This phenomenology is shared by both boundary layer and channel flow and is recognized as a robust physical feature characterizing wall turbulence in general. Specific features related to the flow configuration are indeed identified in the outer region. In particular, the central region of channels is characterized by a generalized Richardson energy cascade where large scales are in equilibrium with small scales at different wall distances through a combined forward cascade and spatial flux. On the contrary, the interface region of boundary layers is characterized by an almost two-dimensional physics where spatially ascending reverse cascades sustain long and wide interface structures with a forward cascade that survives only in the wall-normal scales. The overall scenario consists in a variety of scale motions that while protruding from the turbulent core towards the external region, squeeze at the interface thus sustaining vertical shear in a thin layer. The observed multidimensional physics sheds light on the complex interactions between outer entrainment and near-wall self-sustaining mechanisms with possible repercussions for theories.
Several samples of large- and small-particle magnetite (Fe3O4), as well as its thermal decomposition products formed at different temperatures and atmospheres, have been studied extensively by Mössbauer spectroscopy (MS), both with and without an applied field of 6T. Synthetic mixtures of magnetite and poorly- or well-crystallized maghemite have also been studied. Large-particle magnetite (MCD > 200 nm), when heated in air for 12 hours at T < 400°C, transforms to a mixture of well-crystallized hematite and magnetite, the latter one remaining stoichiometric, according to the relative area-ratios obtained from MS. Thermal treatment at 1300°C in a controlled O2 partial pressure, produced a mixture of stoichiometric and nonstoichiometric magnetite, but the latter component seems to be composed of particles with different degrees of nonstoichiometry. The Mössbauer spectra of the decomposition products at T < 200°C in air of small-particle magnetite (MCD ~ 80 nm) could be successfully interpreted as a mixture of magnetite and maghemite, rather than nonstoichiometric magnetite. This suggestion is further supported by the experiments with the synthetic mixtures. It is clearly demonstrated that is not possible, even by applying a strong external field, to separate the contribution of the A-site of magnetite from that of maghemite.
Synthetic, relatively well-crystallized aluminum-substituted maghemite samples, γ-(Aly·Fe1−y)2O3, with y = 0, 0.032, 0.058, 0.084, 0.106 and 0.151 have been studied by X-ray diffraction and zero-field Mössbauer spectroscopy in the range 8 K to 475 K, and also with an external field of 60 kOe at 4.2 K and 275 K. It was found that there are two different converging models for fitting the zero-field spectra of the maghemites with a superposition of two Lorentzian-shaped sextets, both resulting in inconsistent values for the hyperfine fields (Hhf) and/or the center shifts (δ) of the tetrahedral (A) and octahedral (B) ferric ions. From the applied-field measurements it is concluded that there is a constant difference of 0.12 ± 0.01 mm/s between δB and δA, regardless of the Al content. For the Al-free sample the center shifts are found as: δA = 0.370 mm/s and δB = 0.491 mm/s at 4.2 K and δA = 0.233 mm/s and δB = 0.357 mm/s at 275 K (relative to metallic iron), with an estimated error of 0.005 mm/s. Both δA and δB are observed to decrease with increasing Al concentration. The effective hyperfine fields for the non-substituted maghemite sample are: Heff,A = 575 kOe and Heff,B = 471 kOe at 4.2 K and Heff,A = 562 kOe and Heff,B = 449 kOe at 275 K, with an error of 1 kOe. The B-site hyperfine field remains approximately constant with Al substitution, while for the A site a slight decrease with increasing Al content was observed.
Synthetic aluminum-substituted maghemite samples, γ-(Fe1-xAlx)2O3, have been prepared by thermal decomposition of Al-lepidocrocite (γ-Fe1-xAlxOOH), with × = 0, 0.04, 0.06, 0.14 and 0.18. The particles are needle-shaped and the mean crystallite diameter along the [311] crystallographic direction was found to be between 2.0 and 5.0 nm. Mössbauer spectra were collected at 6 K and from 80 K up to 475 K at steps of 25 K. In a wide range of temperatures the spectra of the non-substituted sample consist of a superposition of a broad sextet and a superparamagnetic doublet, whereas for the Al-maghemites this range is much smaller. From the temperature variation of the fractional doublet area two different parameters were defined: the temperature corresponding to a 50/50 doublet-sextet spectrum (T1/2), and the temperature below which the doublet ceases to exist (T0). These two parameters (T1/2 and T0) decrease from 390 K and 92 K (Al-free sample), to 118 K and 64 K (4 mole % Al) and to 100 K and 48 K (18 mole % Al), respectively. The average hyperfine fields at 6 K undergo a steep drop in going from the Al-free sample (Hhf = 506 kOe) to the sample with 4 mole % Al (Hhf = 498 kOe), but for higher substitutions the effect is much smaller. The A- and B-site quadrupole splittings, obtained from the data between 220 K and 475 K, were found as: ΔEQ,A = 0.86 ± 0.04 mm/s and ΔEQ,B = 0.65 ± 0.04 mm/s for the 4 mole % Al sample. The characteristic Mössbauer temperature, determined from the temperature dependence of the average isomer shift, was found to be in the range of 500–600 K.
In tropical regions, water stress is one of the main causes of the reduction in forage productivity, and irrigation strategies can mitigate the problem, especially for highly productive species. The objective of this study was to evaluate the effects of irrigation, genotype and plant size on productive responses and water use efficiency (WUE) of elephant grass (Cenchrus purpureus [Schumach.] Morrone), in the rainy and dry season. The experimental design was randomized in blocks, arranged in split plots, the main plots were established based on the use of irrigation and the subplots were the tall-sized genotypes (IRI 381 and Elephant B) and dwarfs (Taiwan A-146 2.37 and Mott). The genotypes were evaluated for two years and harvested every 60 days. Water use efficiency, total forage accumulation per year and harvest, forage accumulation rate and forage density were evaluated. There was a significant difference between the genotypes in terms of total forage accumulated (P < 0.05). The most productive genotype was IRI 381, which showed the greatest total forage accumulation (42 168 kg of DM/ha in two years) in the irrigated plots. During the rainy seasons, IRI 381 stood out in terms of forage accumulated (24 667 kg of DM/ha). Irrigation favoured increases in forage accumulation around 60%, in both years of evaluation. Irrigation and plant size influenced the productivity and WUE of elephant grass harvested in 60-day intervals. Tall genotypes and Taiwan A-146 2.37 (dwarf size) stood out in most of the productive traits analysed, while Mott was highlighted by its forage density.
S100B is a calcium-binding astrocyte-specific cytokine, that is considered a biomarker of neurodegeneration; which may be involved in the imbalance of the inflammatory response observed in several brain disorders, including major depression and schizophrenia. Two meta-analyses have reported higher serum levels of S100B in patients with schizophrenia respect to healthy controls.
Different studies have described circadian and seasonal variations of biological variables, such as melatonin or cortisol. It has been reported that there is not circadian rhythm of S100B blood levels in healthy subjects. However, it is not known whether there are circadian oscillations in S100B blood concentrations in patients with schizophrenia.
Objectives
The aim of this study is to describe S100B serum levels in patients with schizophrenia and to analyse whether they follow a circadian rhythm.
Methods
Our sample consists in 47 patients in acute phase and stabilized status. Blood samples were collected at 12:00 and 00:00 hours by venipuncture. Serum levels of Protein S100B were measured three times: at admission, discharge and three months after discharge. Protein S100B was measured by means of ELISA (Enzyme-linked immunosorbent assay) techniques.
Results
12:00
24:00
P
ADMISSION
132,95±199,27
85,85±121,44
0,004
DISCHARGE
73,65±71,744
75,80±123,628
0,070
CONTROL
43,49±34,60
40,14±23,08
0,47
P global
P Admission Vs. Discharge
P Admission Vs. Control
P Discharge Vs. Control
0,97
There is a significance difference between 12:00 and 24:00 at admission for the Protein S100B.However, these difference did not occur at discharge and at three months after discharge.It can be interpreted as there is a circadian rhythm of Protein S100B when the patient has got a psychotic outbreak and disappears at discharge and when is psychopathologically stable.
Conclusions
With respect to our results we can hypothesize that schizophrenic patients in acute relapse present circadian S100B rhythm that is not present when the patients are clinically stable.Furthermore, the decrease of serum protein S100B levels at discharge is indicative of a reduction of the cerebral inflammation, thus it can be a biomarker of cerebral inflammation and this reduction can be the effect of the treatment. Finally, its circadianity could be a guide of this process and clinical improvement.
Depressive symptoms occur in different phases of psychosis, including prodromal, acute and post-psychotic. Post-psychotic depression (PPD) is a phenomenon that presents as a diagnostic and therapeutic challenge. Having been ascribed various descriptions in the past, PPD has been used in a broad manner to describe depressive symptoms that appear in patients with history of psychosis. PPD unveils itself as a separate nosological entity, differing from the adverse effects typically associated with antipsychotics, the negative symptoms of psychosis, and other psychiatric disorders that present with both psychotic and depressive symptoms (e.g. bipolar disorder, schizoaffective disorder, or psychotic depression).
Objectives
The authors present a case of a 64 year-old man hospitalized due to inaugural psychosis with persecutory and grandiose delusions as well as auditory hallucinatory activity, who began to develop a depressive clinical picture whilst under treatment. A brief discussion on post-psychotic depression, from its clinical presentation to its treatment and implications in prognosis is also presented.
Methods
A brief non-systematized literature review using the Pubmed platform as well as presentation of a clinical case.
Results
Depressive complaints are a common complication of psychotic episodes, with the literature estimating that approximately a quarter of psychotic patients present with PPD. Although typically described in association with schizophrenia, recent literature describes PPD occurring alongside other psychotic presentations, including first-episode psychosis. A division between affect and psychosis has been attempted in terms of psychiatric classification, however, the blurred lines between the two continue to contribute to difficulties in differential diagnosis. This becomes a challenge when distinguishing between extrapyramidal symptoms associated with antipsychotics, negative symptoms (i.e apathy, abulia and alogia) and psychiatric disorders with affective-psychotic overlap. Having only recently been considered a distinct clinical entity in psychiatric classification systems, research on its etiology, course, treatment and prognosis are scarce. In regards to the previously described patient, a depressive disorder whilst in treatment for psychosis was identified, and through early recognition of the symptoms treatment with an antidepressant was initiated with favourable response.
Conclusions
PPD is a relatively common phenomenon which is gaining more attention in recent literature. As classifications have begun to consider PPD as a distinct clinical entity, as well as unifying defining criteria, further studies can be developed so as to clarify aspects which remain to be defined. The clinician should be aware of this entity as well as the potentially confounding symptom presentations, so as to provide adequate early treatment thus contributing to improved patient outcomes.
Nowadays, In the exercise of psychiatric clinical activity, the prescription of atypical antipsychotics is a widespread practice.
However, despite the approval in the treatment of psychoses and bipolar affective disorder, where its effectiveness is clearly demonstrated, these drugs are off-label prescribed in most of the clinical situations.
Objectives
This work aims to clarify which atypical antipsychotics are most frequent prescribed and the clinical conditions where their off-label prescription is more common.
Methods
Bibliographic research in the Pubmed® database using the terms “atypical antipsychotics and off-label use”
Results
According to the scientific literature consulted, the off-label prescription of atypical antipsychotics may represent about 70% of the total prescription of these psychotropic drugs.
Risperidone, olanzapine, quetiapine and aripiprazole are the most off-label prescribed among the atypical antipsychotics.
The psychiatric conditions where atypical antipsychotics are most often off-label prescribed are addictive disorders, anxiety disorders, post-traumatic stress disorder, personality disorders, eating disorders, insomnia and dementia, where therapeutic benefits are demonstrated when carefully selected.
Conclusions
The off-label prescription can be interpreted from two points of view. On the one hand, it can guide innovation in clinical practice and improve symptoms in patients who do not respond to standard treatments. On the other hand, it may be associated with negative consequences due to the lack of data on safety and efficacy in these situations.
Despite widespread prescribing of atypical antipsychotics, there is no evidence-based recommendation beyond psychoses and bipolar affective disorder.
Thus, when prescribed, we must proceed with careful monitoring and consider the risks and benefits in relation to off-label prescription.
The prevalence of mental disorders in Higher Education Students (HES) is high and has shown a worrying growth. However, only a small percentage of HES in need of psychological support request it, due to the stigma related to mental illness, requesting informal help from friends and family. Training and increasing Mental Health Literacy (MHL) have been stated as appropriate strategies to reduce stigma and increase the demand for professional psychological support. However, with the increase in the demand for help, the difficulty of providing an adequate response from psychological support of HE services also increases. Therefore, procedures that develop socio-emotional skills in the HES and strategies that enhance the responsiveness of these services are necessary.
Objectives
Taking in consideration the literature review in this field, we develop a project to improve the mental health of HES. The project objectives’: a) the reduction of stigma related to mental disorders through the promotion of MHL in the academic community; b) the promotion of mental health and socio-emotional skills of HES; c) increasing detection and active search for professional mental health support, and d) the implementation of psychological intervention based on a stepped care model that provides an adequate response to most of the students’ mental health needs, according to individual needs.
Methods
The project proposes to perform the following methods: a) training in mental health open to the academic community, which will aim to train volunteers to be Gatekeepers, in order to promote awareness, detection and referral of students in need of professional psychological support; b) implementation of a Student Observatory, with tracking of psychopathological symptoms, supported on the Web; c) implementation of a psychological intervention program based on a stepped care model, which will include the following progressive phases by severity: 1) digital self-help manual; 2) web-based self-help groups; 3) psychological intervention groups supported by the Web; 4) face-to-face intervention groups and 5) individual psychological intervention.
Students will be assessed before and after each step of care, with the following psychological instruments: Mental Health Inventory (MHI); Patient Health Questionnaire (PHQ-9) and Generalized Anxiety Disorder (GAD-7).
Results
The implementation of the presented methods expect to achieve improvements on HES’ mental health, namely improvement of MHI, reduction of PHQ-9 and GAD-7 after each step of the psychological care.
Conclusions
The project presented encloses evidence-based interventions, with inspiration on psychoeducation and cognitive behavioral approaches, and it is expected to contribute to the improvement of mental health of HES. The results will be collected and disseminated. We encourage other researcher and clinicians to perform studies about the mental health of HES.