We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure no-reply@cambridge.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Toxoplasma gondii non-archetypal strains have distinct virulence profiles and immunological activation in the host when compared with archetypal strains. The present work aims to perform an analysis of the inflammatory profile during acute and early chronic infection by T. gondii atypical strain in an experimental murine model. After euthanasia, blood was collected for the quantification of specific IgG antibodies and their subtypes (IgG1/IgG3) by ELISA; bronchoalveolar lavage (BAL) was realized and immunophenotyping of lymphocytes population was performed at 12- and 30-days post infection (dpi); the levels of IFN-γ, IL-12, IL-10, TNF-α, IL-6, IL-17, nitric oxide and total proteins were determined in the BAL supernatant. Tissue cyst burden was determined in the brain homogenate, and the parasite load in the lungs was assessed by quantitative reverse transcription polymerase chain reaction (qRT-PCR). Infection with the CK4 strain induced a lower brain cyst load similar parasite burden in the lungs, and higher levels of IgG1 and IgG3, when compared to ME49. The group infected with the CK4 strain presented higher levels of systemic IFN-γ, and both infected groups displayed similarly elevated levels of systemic TNF-α, IL-6 and IL-17 at 30 dpi, as well as higher numbers of CD4+ and CD8+ T lymphocytes in the acute stage of infection, followed by higher numbers of central and effector CD4+ T cells. IFN-γ levels in the BAL fluid were significantly higher in animals infected with the CK4 strain in both the acute and early chronic stage of infection, highlighting the involvement of the lung environment.
Black and Latino individuals are underrepresented in COVID-19 treatment and vaccine clinical trials, calling for an examination of factors that may predict willingness to participate in trials.
Methods:
We administered the Common Survey 2.0 developed by the Community Engagement Alliance (CEAL) Against COVID-19 Disparities to 600 Black and Latino adults in Baltimore City, Prince George’s County, Maryland, Montgomery County, Maryland, and Washington, DC, between October and December 2021. We examined the relationship between awareness of clinical trials, social determinants of health challenges, trust in COVID-19 clinical trial information sources, and willingness to participate in COVID-19 treatment and vaccine trials using multinomial regression analysis.
Results:
Approximately half of Black and Latino respondents were unwilling to participate in COVID-19 treatment or vaccine clinical trials. Results showed that increased trust in COVID-19 clinical trial information sources and trial awareness were associated with greater willingness to participate in COVID-19 treatment and vaccine trials among Black and Latino individuals. For Latino respondents, having recently experienced more challenges related to social determinants of health was associated with a decreased likelihood of willingness to participate in COVID-19 vaccine trials.
Conclusions:
The willingness of Black and Latino adults to participate in COVID-19 treatment and vaccine clinical trials is influenced by trial awareness and trust in trial information sources. Ensuring the inclusion of these communities in clinical trials will require approaches that build greater awareness and trust.
The population ageing is a reality associated with an increase in prevalence of Dementia. The use of benzodiazepines is often postulated as a risk factor in these syndromes.
Contrary to recommendations for its short-time use, long-term and chronic use are common, with an estimated 8,7% of elderly people in the US taking benzodiazepines.
Objectives
To clarify the most recent evidence on the use of benzodiazepines and the risk of developing dementia.
Methods
Non-systematic review of literature, using PubMed as database and filtering the results for meta-analysis.
Results
Four articles were included in this review.
Zhong G et al. concluded that risk of dementia increased in consumers of benzodiazepines and it was associated with higher doses.
In turn, AlDawasari A et al., when trying to clarify the use of different sedative-hypnotic drugs, found and increased risk with the consumption of benzodiazepines. After exclusion of articles with confounders and adjustment for protopathic bias, the risk was not maintained.
Lucchetta RC et al. concluded that the risk exists but without inferring differences between doses or duration of action.
Finally, Penninkilampi R e Eslick GD investigated this association, after controlling for the protopathic bias, concluding, contrary to AlDawasari et al., that the association benzodiazepines consumption and dementia do not result from this bias.
Conclusions
We cannot draw robust and concrete conclusions between benzodiazepines consumption and the pathogenesis of dementia because not only is the literature limited, but results are also heterogeneous.
However, these prescriptions must be carried out cautiously, especially in the elderly, due to the known adverse effects associated with them.
The “Critically Endangered” Alagoas Antwren Myrmotherula snowi is found only in the Atlantic Rainforest of north-east Brazil. We surveyed all sites where the species has been recorded, as well as 15 other potential sites. We summarise all observations of the species, focusing on the period from 2016 onwards, and including systematic censuses in three breeding seasons (October–March 2018/19, 2019/20, and 2020/21) at the type locality, Murici, where we also searched for nests of the species. We did not locate any individuals at sites other than Murici. The number of apparent individuals detected declined by 67% over seven years (a decline of 50% over the three years in which standardised systematic counts were made), and only six adults were observed in the most recent breeding season. The global population is now likely to be in single-digit figures. Of five nests found, four failed, through predation by snakes and opossums, and abandonment. We installed protective barriers to protect two of these nests from predators, which may have contributed to the single successful fledging. Such methods offer most hope for now of stalling the decline. Efforts to develop captive breeding methods with model species have been underway since 2019 but face many difficulties. Improving habitat protection and restoration is crucial but will only take effect in the long term.
The Brazil Nut tree (Bertholletia excelsa, Lecythidaceae) is a species of considerable historical, economic and ecological importance in South America. Radiocarbon dating indicates some individuals can live from hundreds to more than 1000 years, which means they have the potential to reconstruct deep time growth patterns and their relationship to anthropogenic management or climate change from pre-colonial to present times. However, age estimates vary considerably amongst trees dated with different methods (i.e. tree-ring analysis, radiocarbon-dating, and repeated diameter measurements). Here we analyze living Brazil Nut trees growing in four distinct regions across the Brazilian Amazon using two dating methods: tree-ring counting and radiocarbon dating. Our results show that the congruence between the two methods varies amongst regions, and the highest congruence is found at the site of Tefé, Amazonas. This region features archaeological sites with anthropogenic Terra Preta soils, and is known for its long-term human forest management. This management likely enhanced light and nutrient availability, which possibly enabled the trees to grow at higher rates and form annual rings. Our findings highlight the need for better understanding of the growth of Brazil Nut trees for ecological research, but also the potential of dendrochronology for exploring climate change and human-forest interactions in the Amazon Basin.
Scaphanocephalus is a small trematode genus belonging to the family Opistorchiidae. The genus currently contains only three species associated with marine fish as intermediate hosts and fish-eating birds as definitive hosts. Here, specimens of Scaphanocephalus were collected from the Osprey, Pandion haliaetus, and the White mullet, Mugil curema in the Yucatán Peninsula, Mexico. We report for the first-time DNA sequences of adult specimens of Scaphanocephalus, particularly S. expansus, as well as a sequence of a different species sampled as metacercaria. Morphological comparisons of Scaphanocephalus expansus confirmed the identity of the adult specimens, with minor morphological variations; Scanning electron photomicrographs were included, and the species was re-described. Phylogenetic analysis based on 28S rDNA sequences showed that Scaphanocephalus is monophyletic within Opisthorchiidae and consists of three independent lineages. Sequences of adults are identical to those of S. expansus. Instead, the sequence of the metacercaria sampled from the mesentery of Mugil curema nested with specimens reported as Scaphanocephalus sp. from a labrid fish in the Mediterranean Sea, herein named it as Scaphanocephalus sp. 2.
The considerable amount of original and generic types of skinfold calipers available is a source of systematic measurement error. This study is a brief report that critically examines the original and illustrated structural configuration of the three main types of skinfold calipers. For more than half a century, the Harpenden®, Lange® and Slim Guide® skinfolds calipers have been widely used in clinical and research settings. It is well established that the physical, mechanical and functional specificity of each type of skinfold caliper makes its interchangeable use impossible. Our report suggests that commercially available technical specifications are insufficient to judiciously choose a skinfold caliper. The area of the jaws, the coefficient of spring and the static and dynamic downward pressure of each type of skinfold caliper must be determined in the metrological laboratory and added to the technical user manual. Choosing a type of skinfold caliper for regular use, without conflict of commercial interest, requires a critical understanding of the physical, mechanical and functional characteristics that configure it. Therefore, a new downward static calibration test and the first eligibility flowchart for a skinfold caliper have been proposed. Finally, the information gathered in this report may be useful for manufacturers of anthropometric instruments and health professionals who use the skinfold technique as a tool for diagnosis and nutritional control.
Wernicke’s encephalopathy (WE) is a potentially reversible neuropsychiatric emergency caused by thiamine deficiency, whose classical triad consists of acute onset of confusion, gait ataxia, and oculomotor dysfunction. The diagnosis is missed in 75-80% of cases and approximately 80% of untreated patients develop Korsakoff Syndrome, which is characterized by memory impairment associated with confabulation. Early recognition of nutritional deficiency or any portion of the triad is critical and should prompt treatment, since WE is readily reversible if treated with adequate doses of parenteral thiamine.
Objectives
Starting from a case report of suspected WE, we pretend to discuss the differential diagnosis of seizures in dual pathology.
Methods
Non-systematic review of the literature was performed in PubMed database using the keywords “Wernicke’s Encephalopathy”, “Seizures”, “Alcohol” and “Benzodiazepines”. The articles were selected according to their relevance. A patient´s clinical record was reviewed and presented.
Results
We present a case of a 44-year-old Ukrainian man with suspected background of chronic alcohol abuse and psychiatric history of schizoaffective disorder, who presented with acute onset of confusion, psychomotor agitation, gait ataxia and nystagmus. Anamnesis was hampered by the language barrier and absence of past medical history and patient’s alcoholic habits remained unclear. After suspicion of WE it was introduced thiamine and diazepam, with significant improvement. After discontinuation of diazepam, the patient presented with several episodes of tonic-clonic seizures. He was medicated for seizures with clinical stabilization. At time of discharge the diagnostic discussion prevailed.
Seizures are a common presentation of various conditions associated with alcohol use, whose differential diagnosis is difficult, especially in patients with dubious alcohol consumption. Alcohol abuse is a major precipitant of status epilepticus as seizure threshold is raised by alcohol drinking. Seizures may also occur during alcohol withdrawal, for which treatment with benzodiazepines is recommended, however carefully, since both abrupt cessation and high-dose use are critical for the appearance of seizures. Although very rare, WE may also present with seizures, whereby overdiagnosis and overtreatment are preferred to prevent persistent neurocognitive impairments.
Conclusions
This case illustrates the complexity of neuropsychiatric diagnoses in dual pathology. It requires a longitudinal assessment for a better understanding of clinical conditions and establishment of the best therapeutic approach.
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.
Diabetes is one of the diseases in which treatment adherence is most fragile. Several factors seem to contribute to the lack of treatment compliance of the disease, from longer duration of diabetes to mental health issues. In this study, we try to identify the main factors affecting insight for diabetes (clinical, demographic, and narcissistic traits).
Objectives
The main objective is to find clinical, demographic and narcisistic characteristics that differenciate good insight from poor insight diabetic patients.
Methods
A cross-sectional study was developed with inclusion of 100 patients with diabetes, aged over 18 years, carried out at the Associação Protetora dos Diabéticos de Portugal (APDP). All the participants gave their informed consent. Patients were submitted to DAS (Diabetes Awareness Scale), and NPI-13 (Narcissistic Personality Inventory-13), the two most used evaluations for insight in diabetes and narcisic personality traits. The clinical and demographic factors were obtained by the records from APDP whose Ethic Comittee gave permission for this study.
Results
The clinical and demographic characteristics of the sample of 100 patients with diabetes, are described in Table 4.1.
Positive and statistically significant correlations were found between HbA1c and total DAS (r = 0.420, p < 0.001), Symptom Attribution (r = 0.362, p < 0.001), Awareness of Negative Consequences (r = 0.229, p = 0.025), and Awareness of Need for Treatment (r = 0.210, p = 0.040) - Table 5. In other words, patients who were metabolically poorly controlled and had higher levels of serum HbA1c, showed higher levels of insight into the disease.
There was a statistically significant negative low-moderate affect correlation between Symptom Attribution of the DAS and the E/E (Empowerment/Explorativeness) sub score of the NPI-13 (r= -0.243, p=0.05)-Table 8.
Image:
Image 2:
Image 3:
Conclusions
Our results allowed us to conclude that the capacity for insight may sometimes arise in the context of already existing consequences of diabetes, in patients with poor metabolic control.Some studies had already highlighted the dubious role of increased individual perception of illness with diabetes regulation, while others were consistent with our observations, regarding the role of gender and family history in insight.
Despite these results, we propose that the knowledge of the profile of patients with insight and the anticipation of a low insight to the disease at the time of diagnosis or during follow-up allows the individualization of medical practice and the use of insight as a tool for better metabolic control of patients, ideally should arise before the development of vascular complications.
However, further studies are needed, ideally with a larger and more diverse, to understand if there are other factors that may be related to insight in the disease, as well as the development of techniques for acquisition of insight in patients with diabetes.
Substance use disorders(SUDs) are a major health concern and current treatment interventions have proven only limited success. Despite increasing effectiveness, still about 50–60% relapse within 6–12 months after treatment [Cornelius et al., Addict Behav. 2003;28 381-386]. SUDs are defined as chronic disorders of brain reward system, motivation, and memory processes that have gone awry. Medication reducing craving and substance use is mainly available for alcohol dependence and to a lesser extent for other substances.
Hallucinogens may represent a group of agents with potential anti-craving properties subsequently reducing substance use in SUD patients. For instance, lysergic acid diethylamide(LSD) and psilocybin have previously been shown to effectively alleviate symptoms of alcohol and nicotine dependence.
Objectives
New treatments preferably focusing on reducing craving and subsequent substance use are therefore urgently needed. The hallucinogen psilocybin may provide a new treatment option for SUD patients, given the beneficial results observed in recent studies
Methods
Systematic revision of literature.
Results
In the 1950s, a group of drugs with potential to alter consciousness were discovered (hallucinogens). Several studies suggested their anti-SUD potential, improving self-acceptance and interpersonal relationships, reducing craving and alcohol use. As a result of its recreational popularity during the 1960s, they were banned in 1967, greatly hampering scientific research in this field. Recently, psilocybin, an hallucinogenic substance in psilocybin-containing mushrooms has gained popularity in neuropsychological research, showing to increase trait openness, cognitive and behavioral flexibility, and ratings of positive attitude, mood, social effects, and behavior and even reported persistent positive changes in attitude and behavior. These findings might suggest a valuable compound for the treatment of psychiatric conditions with several additional studies providing supportive evidence for the therapeutic potential of psilocybin for SUD treatment and relapse prevention.
Conclusions
With the reported limited amount of side effects and potential beneficial effects of psilocybin in SUD, there are valid reasons to further investigate the therapeutic efficacy and safety of psilocybin as a potential SUD treatment. On the one hand, psilocybin may exert its anti-addictive properties by beneficial effects on negative emotional states and stress. On the other hand, psilocybin may improve cognitive inflexibility and compulsivity. Research on the efficacy of psilocybin on SUD is still limited to a handful of published studies to date. As a result, many important questions related to the use of psilocybin as a complement to current treatment of SUD and its working mechanisms remain unanswered. Before psilocybin can be implemented as a treatment option for SUD, more extensive research is needed.
The prevalence of mental illness has increased worldwide over the past few years. At the same time, and even in the sense, there is also an increase in suicide rates with special incidence in certain risk groups, among which health professionals stand out.
In this particular group, physicians seem to represent a class particularly vulnerable by the stress and demand associated with it, but also by access and knowledge about potentially lethal means.
For this very part, they have a higher risk of suicide than the general population.
Objectives
This paper aims to better understand the phenomenon of suicide among physicians and identify which medical specialties are most vulnerable.
Methods
Bibliographic research in the Pubmed® database using the terms “suicide and physicians”.
Results
The data obtained from the scientific literature consulted indicate that physicians have a higher risk of suicide than the general population, with greater emphasis on females who have higher rates compared to males.
Work factors that translate into higher levels of demand and stress combined with easy access and knowledge about the use of potentially lethal means seem to contribute very significantly to this phenomenon. Perfectionist personality traits with a high sense of responsibility and duty are also important characteristics that place these professionals in a position of greater vulnerability.
With regard to the different medical specialties, anesthesiology, psychiatry and general and family medicine are the ones with higher suicide rates among the medical class.
Conclusions
The risk of suicide, although admittedly high in the medical class, is not homogeneous among different countries, being naturally influenced by the satisfaction/gratification obtained in the performance of their profession. In this sense, countries such as Switzerland and Canada show higher levels of professional satisfaction. In the opposite direction, dissatisfaction in the exercise of clinical activity is associated with higher levels of fatigue and burnout.
Medical women, due to the need to combine the responsibility of family tasks with professional responsibility, are at greater risk.
In this sense, it is necessary to develop strategies that are more appropriate for the prevention and early identification of suicide risk situations that can be experienced not only by improving working conditions but also by better addressing professionals suffering from mental disorders.
Psychosis is a frequent complication in patients diagnosed with Parkinson’s Disease (PD). Characterized mainly by visual hallucinations and paranoid delusions, it occurs most frequently, but not exclusively, as an adverse effect of antiparkinson medications. Nevertheless, cognitive impairment and dementia, as a frequent feature of PD, needs to be considered for differential diagnosis.
Objectives
Our main objective is to report a case of PD Psychosis, its diagnosis and management and complement it with a non-systematic review of literature.
Methods
Patient file consultation and an additional research, based on the key words “Psychosis” and “Parkinson’s Disease”, using Pubmed as database.
Results
A 53-year-old female, diagnosed with Juvenile Parkinson’s Disease since age 45 and, as expected, polimedicated with antiparkinson medication. Without any relevant psychiatric background, she was admitted to the emergency department for disorganized behaviour, with 2 weeks of evolution. There, it was also possible to determine the presence of auditive hallucinations and persecutory delusions, associated with marked anguish.
After exclusion of any underlying cause for this symptomatology, inpatient treatment was proposed and accepted by the patient. In collaboration with the Neurology Department, a gradual reduction and optimization of antiparkinson drugs was conducted, associated with introduction of low doses of antipsychotic drugs, in this case Olanzapine. With this medication adjustments, clinical improvement was accomplished, with eventual fading and cessation of psychotic symptoms. Additionally, an irregularly intake of antiparkinson drugs was considered the most probably cause of this clinical decompensation.
Conclusions
As present in literature, due to the chronicity and complexity of PD, stopping all antiparkinson drugs is not an option, even when psychotic symptoms, that could be a consequence of these drugs, are present. Therefore, a rigorous evaluation and management are mandatory, including the exclusion of other underlying causes and a careful therapeutic adjustment, with gradual reduction of antiparkinson drugs, addressing an eventual temporal relationship between the beginning of a specific drug and the onset of symptoms, and verification of therapeutic compliance, including an involuntary overdose. In cases of refractory symptoms, and after a risk-benefit assessment, pharmacologic treatment directed at these symptoms, low doses of anti-psychotics, may be necessary.
Post-traumatic stress disorder (PTSD) is defined by an exaggerated fear responses (FA) which fails to extinguish over time and cannot be inhibited in safe contexts. Studies report that traumatic experiences (TE) affect hormonal systems mediated by the hypothalamic-pituitary-adrenal (HPA) axis and the oxytocinergic system. Oxytocin (OXT) is a neurohormone produced in the hypothalamus that has social functions like the promotion of prosocial and affiliative behaviors, increased self-confidence and positive social memories. In PTSD there is a diminished inhibitory top-down control over the FA, which is characterized by amygdala hyperactivity, ventromedial prefrontal cortex (vmPFC) hypoactivity and diminished structural and functional connectivity between both areas, which results in anxiety increase and dysregulated autonomic and endocrine FA. In parallel, TE decrease the synthesis and release of OXT, resulting in the dysfunction of the negative feedback mechanism on the HPA, leading to hypercortisolemia and maximizing the response to a stressful stimulus. Previous studies report that the administration of OXT can reduce cortisol levels as well as attenuating amygdala hyperactivity and normalizing the connectivity of this structure with frontal areas, diminishing the FA. Therefore, OXT has been investigated as a potential therapeutic agent administered intranasally early after trauma as a strategy to prevent PTDS on individuals having high risk.
Objectives
The aim of this work is to review the potential of intranasal OXT administration as early preventive intervention for PTSD.
Methods
Systematic review of the literature published in Pubmed, using the terms “Oxytocin”, “Post-traumatic Stress Disorder”, “Stress”.
Results
Studies found significant associations between TE and OXT and report that TE and PTSD are strongly associated with reductions in OXT. Literature report that the acute effects of OXT administrations in individuals with TE tend to be anxiolytic only in less severe forms, by modulating the HPA axis and the autonomic nervous system. Moreover, in recent TE, OXT seems to increase the re-experience of traumas and restore the function of different networks associated with fear control in PTSD patients. FMRI studies indicate that intranasal OXT attenuates amygdala hyperactivity and enhances amygdala´s connectivity with vmPFC, resulting in increased control over the FA. Finally, studies report that a single oxytocin administration increases neuronal fear processing but repeated administration reduces PTSD symptoms up to 6 months post trauma in patients with high acute symptoms.
Conclusions
Repeated administration of intranasal oxytocin early after trauma seems to diminish the acute symptoms in early stages of PTDS, being a potential pharmacological strategy to prevent PTDS in individuals at high risk by increasing the control of FA.
Pregnancy and childbirth are moments of great vulnerability in a woman’s life, which can predispose her to the development of psychopathology, ranging from transient depressive symptoms (“baby blues”) to psychotic symptoms. Postpartum delirium is the psychiatric syndrome that some authors refer to as puerperal psychosis par excellence. It was first described in the 18th century and were thought to be associated with painful delivery, then became rare after the introduction of effective analgesia.
Objectives
The objective of this work is to contribute to a better understanding of this condition, through a literature review.
Methods
Bibliographic research using Pubmed® and the keywords: postpartum delirium.
Results
Clinical presentation of postpartum delirium includes: constantly varying degrees of consciousness; perplexity; hallucinations or pseudo-hallucinations of one or more organs of sense; delusions or delusive-type thoughts; great motoric unrest and considerable motoric and verbal abandon; and acute aggressive discharges can also occur. It is thought to be due to organic complications, such as infectious disease, abnormal loss of blood, thrombosis, neurological disease, obstetric disease, vitamin deficiencies, hormonal changes. An article from 1975 mentions how difficult was to treat postpartum delirium despite the development of psychopharmaceutical therapy. The patients remained psychotic for long periods and had many relapses. They mention a comparative study that found that the symptomatic treatment of this syndrome with a combination of perfenazine and lithium carbonate produced relatively favorable results. For that reason, at that time, it was the medication of choice. Nowadays the psychopharmacological treatment of puerperal psychosis, in general, still consists of the combination of lithium and an antipsychotic, such as haloperidol, and possibly a benzodiazepine, such as lorazepam.
Conclusions
Postpartum delirium is rarely mentioned in the literature and just a few cases have been described. It is considered a rare postpartum psychotic condition but would perhaps be less rare if its existence were recognized. On this note, it is important for clinical practice to research on the psychoses of pregnancy and not just the most common.
The Default Mode Network (DMN) is a brain system with physiological and cognitive properties that make it a major pillar of cortical integration. It has been a subject of increased research on different psychiatric conditions such as schizophrenia. It was hypothesized that alterations in the brain connectivity of the DMN, at the level of its functional connectivity (FC) and structural connectivity (SC), may be at the basis of this pathology. Thus, the DMN has been associated with several clinical variables such as symptom severity, disease prognosis and response to antipsychotic treatment, making this system a potential future tool in the study of these variables for better clinical guidance in patients with schizophrenia.
Objectives
The aim of this study is to review the role of DMN in the pathophysiological mechanisms underlying schizophrenia, as well as its potential role as a future biomarker in detecting patients at high risk of developing a first psychotic episode and predicting therapeutic response to antipsychotics.
Methods
Systematic review of the literature published on Pubmed using the terms: “Default Mode Network”, “Schizophrenia”, “First Psychotic Episode” and “Antipsychotics”.
Results
A myriad of studies revealed the presence of dysfunctional DMN brain activity in patients with schizophrenia. However, increased FC of the DMN is the predominant outcome reported by literature in patients with and without chronic exposure to antipsychotic therapy, at high risk of developing psychosis and on both early and advanced disease stages, suggesting that the DMN may have a meritorious role on the pathophysiology of schizophrenia. Some studies have found SC changes associated with altered FC on patients at early stages of the disease without exposure to prolonged antipsychotic therapy. Regarding the relationship between DMN and antipsychotic therapy, studies suggested that DMN is shaped by antipsychotic therapy by regulating FC activity.
Conclusions
This work helped us to understand the importance of the future study of the connectivity of the DMN in a longitudinal perspective of the course of schizophrenia in order to potentiate the creation of brain signatures that might translate the alterations of the connectivity of the DMN in early stages of the disease, which in turn could work as potential future biomarkers for the detection of patients at high risk of developing a first psychotic episode but also work on predicting the therapeutic response to antipsychotics, allowing us to direct our clinical orientation towards a better prognosis of the disease.
Members of the genus Strigea Abildgaard, 1790 are endoparasites of birds distributed worldwide. Adults of an undescribed species of the genus Strigea were collected from the intestines of two hawk species (Rupornis magnirostris and Accipiter coperii). Other species identified as Parastrigea macrobursa that were described in Argentina were also recovered from two hawk species (Buteogallus urubitinga and Buteogallus anthracinus) in three localities along the coasts of Mexico. Specimens of the two species were sequenced for three molecular markers, the internal transcribed spacers locus (ITS1-5.8S rDNA- ITS2) and the domains D1–D3 from the large subunit from nuclear ribosomal DNA and the cytochrome c oxidase subunit 1 from mitochondrial DNA. The newly sequenced specimens were aligned with other strigeids sequences downloaded from GenBank. Maximum likelihood and Bayesian analyses inferred with each molecular marker revealed that our specimens of Strigea sp. formed an independent lineage, which is recognized herein as a new species, Strigea magnirostris n. sp., representing the first species in Mexico and the 16th in the Neotropical region. Morphologically, the new species is distinguished from other congeneric species from the Americas by having an oral sucker with several papillae around it, well-developed pseudosuckers (118–248 μm), a tegument covered with tiny spines, a larger cone genital (193–361 × 296–637) and a larger copulatory bursa (247–531 × 468–784). Our phylogenetic analyses revealed that P. macrobursa is not closely related to other members of the genus Parastrigea and is nested within Strigea, suggesting that P. macrobursa should be transferred to Strigea to form Strigea macrobursa n. comb., expanding its distribution range from Mexico to Argentina. Finally, the analyses also revealed that the taxonomy and systematics of Strigea should be re-evaluated, combining morphological and molecular characteristics.
The parasite biodiversity of mouse opossums in Brazil remains incompletely explored. We describe a new species of Subulura (Ascaridida: Subuluroidea) from the large intestine of the white-bellied woolly mouse opossum, Marmosa constantiae, based on the results of light and scanning electron microscopy (SEM). We also partially sequenced the mitochondrial cytochrome c oxidase I (MT-CO1) gene of the new species, using molecular phylogenetic analyses to determine its relationships within the Subuluroidea superfamily. As molecular data on subuluroid species are extremely limited, few inferences could be drawn from our phylogenies. Our SEM observations showed the detailed morphology of the cephalic extremity, precloacal pseudo-sucker, caudal papillae, phasmids and vulva. Subulura eliseae sp. n. differs from the other four Subulura parasites species of marsupials by the number of caudal papillae and the structure dimensions, and size of the spicule. Moreover, S. eliseae sp. n. has ten pairs of caudal papillae, which is unique compared to other species. We present morphometric and molecular data on this new species, contributing to future studies on subuluroids.
The inoculation with Azospirillum brasilense has the potential to reduce the use of mineral fertilizers with efficient capacity to promote plant growth and yield. Most studies on the Azospirillum–plant association have been conducted on cereals and annual grasses. More studies are needed in perennial pastures, such as bermudagrass (Cynodon dactylon (L.) Pers.) that require substantial nitrogen (N) fertilization to maximize their production potential. Therefore, pastures based on Tifton 85 bermudagrass in association with annual ryegrass (Lolium multiflorum Lam.), which were inoculated with A. brasilense and fertilized with increasing amounts of N fertilizer and grazed by lactating Holstein cows were evaluated. Three grazing systems were evaluated: (i) Tifton 85, inoculated + 180 kg N/ha per year; (ii) Tifton 85 + 230 kg N/ha per year; and (iii) Tifton 85 + 280 kg N/ha per year. Forage samples were collected before and after grazing to evaluate the responses of the plants and animals. The forage yields of the systems were 21.0, 20.8 and 22.1 t DM/ha per year and the stocking rates were 3.9, 3.8 and 4.0 animal unit/ha per day, respectively. Crude protein, total digestible nutrients and neutral detergent fibre concentrations were 162, 560 and 667 g/kg, respectively. Inoculation in pastures planted with Tifton 85 bermudagrass in combination with ryegrass (plus 180 kg N/ha per year) had a positive effect, providing forage yield and nutritional value equivalent to those with fertilization with 230 kg N/ha per year.
With natural hazards increasing in frequency and severity and global population aging, preparedness efforts must evolve to address older adults’ risks in disasters. This study elucidates potential contributors to the elevated older adult mortality risk following Hurricane Maria in Puerto Rico through an examination of community stakeholder preparedness, response, and recovery experiences.
Methods:
In April 2018, qualitative interviews (n = 22) were conducted with stakeholders in 7 Puerto Rican municipalities. Interview transcripts were deductively and inductively coded and analyzed to identify salient topics and themes representing participant response patterns.
Results:
The hurricane’s detrimental impact on older adult health emerged as a prominent finding. Through 6 months post-hurricane, many older adults experienced unmet needs that contributed to declining physical and emotional health, inadequate non-communicable disease management, social isolation, financial strain, and excess morbidity and mortality. These needs were predominantly consequences of lengthy public service gaps, unsafe living conditions, interrupted health care, and the incongruence between preparedness and event severity.
Conclusions:
In a landscape of increasing natural hazard frequency and magnitude, a pattern of older adult risk has become increasingly clear. Study findings compel practitioners to engage in natural hazard preparedness planning, research, and policy-making that considers the multiple facets of older adult well-being.