How abstract is risk for workers? Expertise, context and introspection in abstract concepts

Two studies were performed to test whether abstract concepts are grounded in experience and activate introspective/linguistic information. In Study 1, four groups of participants, each with different expertise in the domain of safety and security at the workplace (S&S), defined abstract concepts belonging to the S&S domain and differing in degree of abstractness. The definitions included mainly situations, confirming grounding of abstract concepts. In Study 2 the task was performed by students with no experience of S&S. The definitions were modulated by participants’ expertise; the role of introspection increased with more abstract concepts. Results support embodied theories on abstract concept

A revelação do diagnóstico de doença de Alzheimer: opiniões de cuidadores em uma amostra brasileira

BACKGROUND: Disclosure of the diagnosis of Alzheimer's disease (AD) remains a contentious issue, and has been little studied in developing countries. OBJECTIVE: To investigate the influence of socio-demographic factors and the experience of being a caregiver on opinion about disclosing AD diagnosis to the patient in a Brazilian sample. METHOD: Caregivers of 50 AD patients together with 50 control participants that did not have the experience of being a caregiver of AD patient were interviewed using a structured questionnaire. RESULTS: Most of the participants (73.0%) endorsed disclosure of the diagnosis, while caregivers were less prone to disclose (58.0%) than controls (88.0%; p=0.0007). Logistic regression confirmed that only the experience of being a caregiver was associated with a lesser tendency for disclosure endorsement. CONCLUSION: The majority of participants was in favor of disclosing the diagnosis, but caregivers were less willing to disclose the diagnosis to the AD patient.FUNDAMENTO: A revelação do diagnóstico de doença de Alzheimer (DA) tem sido tema polêmico e pouco estudado em países em desenvolvimento. OBJETIVO: Investigar a influência de fatores sócio-demográficos e a experiência de ter sido cuidador na opinião sobre a revelação do diagnóstico em uma amostra brasileira. MÉTODO: Cuidadores de 50 pacientes com DA e 50 indívíduos controle que não tinham tido experiência como cuidadores de pacientes com DA foram entrevistados com o uso de um questionário estruturado. RESULTADOS: A maioria dos participantes (73,0%) manifestou-se a favor da revelação diagnóstico aos pacientes, mas cuidadores foram menos favoráveis (58,0%) que controles (88,0%; p=0,0007). Regressão logística demonstrou que apenas a experiência como cuidador foi associada com menor tendência a apoiar a revelação do diagnóstico. CONCLUSÃO: A maioria dos participantes foi a favor da revelação do diagnóstico ao paciente, mas aqueles com experiência como cuidadores de pacientes com DA foram menos favoráveis

New Insights Into Mitochondrial DNA Reconstruction and Variant Detection in Ancient Samples.

Ancient DNA (aDNA) studies are frequently focused on the analysis of the mitochondrial DNA (mtDNA), which is much more abundant than the nuclear genome, hence can be better retrieved from ancient remains. However, postmortem DNA damage and contamination make the data analysis difficult because of DNA fragmentation and nucleotide alterations. In this regard, the assessment of the heteroplasmic fraction in ancient mtDNA has always been considered an unachievable goal due to the complexity in distinguishing true endogenous variants from artifacts. We implemented and applied a computational pipeline for mtDNA analysis to a dataset of 30 ancient human samples from an Iron Age necropolis in Polizzello (Sicily, Italy). The pipeline includes several modules from well-established tools for aDNA analysis and a recently released variant caller, which was specifically conceived for mtDNA, applied for the first time to aDNA data. Through a fine-tuned filtering on variant allele sequencing features, we were able to accurately reconstruct nearly complete (>88%) mtDNA genome for almost all the analyzed samples (27 out of 30), depending on the degree of preservation and the sequencing throughput, and to get a reliable set of variants allowing haplogroup prediction. Additionally, we provide guidelines to deal with possible artifact sources, including nuclear mitochondrial sequence (NumtS) contamination, an often-neglected issue in ancient mtDNA surveys. Potential heteroplasmy levels were also estimated, although most variants were likely homoplasmic, and validated by data simulations, proving that new sequencing technologies and software are sensitive enough to detect partially mutated sites in ancient genomes and discriminate true variants from artifacts. A thorough functional annotation of detected and filtered mtDNA variants was also performed for a comprehensive evaluation of these ancient samples

Neandertal-like traits visible in the internal structure of non-supranuchal fossae of some recent Homo sapiens: The problem of their identification in hominins and phylogenetic implications

Although recently the internal structure of the non-supranuchal fossa of Homo sapiens has been described and compared to that observed in the Neandertal suprainiac fossa, until now it has not been examined in any modern human children. In this study, the internal structure of this fossa in the occipital bones of three children (two aged 3–4 years and one aged 5 years ± 16 months) and one adult individual representing recent Homo sapiens from Australia was analysed and compared to that of the Neandertal suprainiac fossa. In order to analyse the internal composition of the fossae of the examined specimens, initially, high-resolution micro-CT datasets were obtained for their occipital bones; next, 3D topographic maps of the variation in thickness of structural layers of the occipital bones were made and 2D virtual sections in the median region of these fossae were prepared. In the fossa of one immature individual, the thinning of the diploic layer characteristic of a Neandertal suprainiac fossa was firmly diagnosed. The other Neandertal-like trait, concerning the lack of substantial thinning of the external table of the bone in the region of the fossa, was established in two individuals (one child and one adult) due to the observation of an irregular pattern of the thickness of this table in the other specimens, suggesting the presence of an inflammatory process. Our study presents, for the first time, Neandertal-like traits (but not the whole set of features that justifies the autapomorphic status of the Neandertal supraniac fossa) in the internal structure of non-supranuchal fossae of some recent Homo sapiens. We discuss the phylogenetic implications of the results of our analysis and stress the reasons that use of the 3D topographic mapping method is important for the correct diagnosis of Neandertal traits of the internal structure of occipital fossae

Classical and Atypical Bovine Spongiform Encephalopathy: Epidemiology, Pathogenesis and Diagnosis

Classical bovine spongiform encephalopathy (C-BSE) is a fatal neurodegenerative disease of cattle, detected in the United Kingdom and many other countries since the 1980s. The origin of C-BSE is uncertain, but epidemiological studies suggest that the source of this disease was cattle feed prepared from prion-infected animal tissues. To date, cattle populations have been monitored through passive and active surveillance programs. From 2004, two different forms of BSE termed as L-BSE, also known as bovine amyloidotic spongiform encephalopathy (BASE), and H-BSE have been discovered in Italy and France. All these atypical cases have been detected in animals over 8 years of age. To date, there is no comprehensive information about the origin of the atypical BSEs (sporadic vs. acquired). Moreover, there are only very limited data available, concerning the pathogenesis of both atypical forms, as compared to C-BSE. This chapter provides a well-organized overview of what is known about classical and atypical BSE. It will review information on the main epidemiological features, pathogenesis, and the criteria for the routine diagnosis based on rapid tests, histological, immunohistochemical, and Western blot examinations

Zoonoses Surveillance in Italy (2000-2009): Investigation on Animals with Neurological Symptoms

Zoonoses are defined by the World Health Organization (WHO) as \u201cThose diseases and infections naturally transmitted between vertebrae animals and man\u201d (WHO 1959) (Palmer et al., 1998). They may be caused by viruses, bacteria, including chlamidiae and rickettsiae, fungi, protozoa, helminths and arthropods (Krauss et al., 2003), and transmitted directly (through contact with skin, hair, eggs, blood or secretions) or indirectly (by insect vectors and ingestion of contaminated food). Currently, 1415 pathogens for humans have been identified and of these approximately 61% (868) are agents of zoonoses, some of which manifest with neurological signs; 132 agents are also associated with emerging zoonoses (Asjo et al., 2007; Matassa, 2007; Taylor et al. , 2001). Neurological zoonoses are widespread, especially in the developing countries where they are not even diagnosed in most cases. Emerging zoonoses of recently identified pathogens are Lyme disease, cryptosporidiosis, West Nile disease, transmissible spongiform encephalopathy, and possible variants of the avian influenza virus, which have found new favourable conditions for spreading. In contrast, re-emerging zoonoses are well-known diseases considered as eradicated in a given country but recur with an exponentially increasing incidence, such as tuberculosis, leptospirosis, rabies (Matassa, 2007)

Final results of project on feline spongiform encephalopathy

Feline spongiform encephalopathy (FSE) is a transmissible spongiform encephalopathy associated with the accumulation of an abnormal isoform of the prion protein (PrPsc) in the Central Nervous System. This research allowed to identify other neurological diseases affecting the Italian cat population

A relevant long-term impact of the circulation of a potentially contaminated vaccine on the distribution of scrapie in Italy. Results from a retrospective cohort study

A sudden increase in the incidence of scrapie in Italy in 1997 was subsequently linked to the use of a potentially infected vaccine against contagious agalactia. The relative risk for the exposed farms ranged between 6 and 40. The aim of this study was to assess the long-term impact of exposure to the potentially scrapie-contaminated vaccine on the Italian classical scrapie epidemic. We carried out a retrospective cohort study, fitting mixed-effects Poisson regression models, dividing national geographic areas into exposure categories on the basis of the vaccine circulation levels. We took into account the sensitivity of the surveillance system applied in the different areas. The population attributable fraction (PAF) was used to assess the impact on the total population of farms associated with the effect of circulation of the vaccine. The provinces where the vaccine was more often sold were noted to have a higher level of disease when compared to those provinces where the vaccine was sold less often (incidence rate ratio [IRR]: 2.7; 95% confidence interval [CI]: 1.1-6.5). The population attributable fraction was high (68.4%). Standardization techniques allowed to account for the potential of geographical variability in the sensitivity of the Italian surveillance system. Although the number of the directly exposed farms was limited, an important long-term impact of the vaccine circulation could be quantified in terms of secondary outbreaks likely due to the exchange of animals from directly exposed flocks

Cross-cultural adaptation of the disability assessment for dementia (DAD)

The original version of the Disability Assessment for Dementia (DAD) was translated into Portuguese and back translated to English. The divergences of translation were identified and discussed, resulting in a version that was used in a preliminary investigation for cross-cultural adaptation. The final version was administered to 29 patients with mild to moderate probable Alzheimer's disease. The correlation coefficients of DAD were 0.929 and 0.932 for the inter-examiner and test-retest evaluations respectively. The reliability indexes were also high (Kappa 0.72 p<0.001 inter-examiners and 0.85 p<0.001 test-retest). The Brazilian version of DAD was easy to administer and had good reliability to assess the functional status of demented patients. It will contribute to the follow-up of these patients in our population. Moreover, it can be used in transcultural studies on functional abilities in dementia.A versão original da Escala de Avaliação de Incapacidade em Demência (Disability Assessment for Dementia, DAD) foi traduzida para a língua portuguesa e retrotraduzida para o inglês. Divergências de tradução foram identificadas e discutidas, chegando-se a uma versão que foi submetida a pré-teste para adaptação sócio-cultural. A versão final foi administrada a amostra de 29 pacientes com doença de Alzheimer provável de leve a moderada. Os coeficientes de correlação da DAD foram 0,929 e 0,932 nas avaliações inter e intra-examinadores respectivamente. Os índices de confiabilidade também foram elevados (Kappa=0,72; p<0,001 inter-examinadores e Kappa=0,85; p<0,001 intra-examinadores). A versão brasileira da escala DAD mostrou-se um instrumento de fácil aplicação e boa confiabilidade para avaliação funcional de pacientes com demência e poderá contribuir para o acompanhamento desses pacientes em nosso meio. Esta versão também poderá ser utilizada em estudos transculturais sobre habilidades funcionais de pacientes com demência.Universidade de São Paulo Faculdade de Medicina Hospital das ClínicasUniversidade Federal de São Paulo (UNIFESP) Escola de Paulista de Medicina Departamento de Neurologia e NeurocirurgiaUNIFESP, Escola de Paulista de Medicina Depto. de Neurologia e NeurocirurgiaSciEL

Brazilian version of the Cornell depression scale in dementia

OBJECTIVE: Translating and adapting the Cornell scale for depression in dementia to the Portuguese language and verifying the interrater and test-retest reliability of the translated and adapted version. METHOD: The Cornell scale was translated into Portuguese and back translated into English. Divergences of translation were identified and discussed, resulting in a version which was submitted to a pre-test for cross-cultural adaptation. The final version was administered to a sample of 29 patients with probable AD and to their caregivers. RESULTS: The Cornell Scale presented good interrater (Kappa=0,77; p<0,001) and test-retest reliability (Kappa=0,76; p<0,001). The final version was easy to administer and well understood by the caregivers. CONCLUSION: The Brazilian version of the Cornell Scale is an instrument with good reliability to evaluate depression in patients with dementia. This tool will contribute to the evaluation and follow-up of depressed patients with dementia in our population and may also be used in multicentric studies with Brazilian population.OBJETIVO: Tradução e adaptação da escala Cornell de depressão em demência e verificação da confiabilidade entre e intra-examinadores da versão na língua portuguesa. MÉTODO: A versão original da Escala Cornell foi traduzida para o português por firma especializada em tradução de textos médicos e retrotraduzida para o inglês por outros dois tradutores independentes. As divergências de tradução foram identificadas e discutidas, chegando-se à versão que foi submetida à pré-teste para adaptação sócio-cultural. Após esta adaptação, obteve-se a versão final que foi administrada a amostra de 29 pacientes com doença de Alzheimer provável e aos seus cuidadores. RESULTADOS: A versão final da escala mostrou-se de fácil aplicação e obteve boa confiabilidade intra-examinador (Kappa=0,77; p<0,001) e entre-examinadores (Kappa=0,76; p<0,001). CONCLUSÃO: A versão brasileira da Escala Cornell é um instrumento que pode ser utilizado para avaliação e acompanhamento de depressão em pacientes com demência.Universidade de São Paulo Faculdade de Medicina Hospital das ClínicasUniversidade Federal de São Paulo (UNIFESP) Escola de Paulista de Medicina Departamento de Neurologia e NeurocirurgiaUNIFESP, Escola de Paulista de Medicina Depto. de Neurologia e NeurocirurgiaSciEL