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8 emner vises.
Maria Paula de Souza Sampaio, Mateus Santana do Rosário, Lorena Cunha Martins, Luiza Vieira Luedy Trindade, Marcos Vinicius Lima de Oliveira Francisco, Bernardo Gratival Gouvea Costa, Gessica Almeida Vasconcelos, Italo Andrade Barbosa Lima, Yasmin Santos Freitas Macêdo, Fernanda Maria Lessa Carvalho, Marina Borges Rabelo de Santana, Ricardo Khouri, Hegger Fritsch, Joilson Xavier, Vagner Fonseca, Marta Giovanetti, Arabela Leal e Silva de Mello, Felicidade Mota Pereira, Gubio Soares Campos, Pedro Antonio Pereira de Jesus, Daniel Santana Farias, Murilo de Santos Souza, Adilson Junior Pinto Galvão, Felipe Oliveira Costa, Marcia Carvalho Bessa, Janeusa Rita Leite Primo Chagas, Celia Silvany, Jose Mário Meira Teles, Maricelia Maia de Lima, Tarsis Leonardo Almeida Farias, Tiago Gräf, Isadora Cristina de Siqueira
International Journal of Infectious Diseases, 16.05.2024
Tilføjet 16.05.2024
Viral encephalitis is mainly characterized by fever, headache, and decreased consciousness. Although, in most cases, the underlying cause of encephalitis is unknown, viruses of the Herpesviridae family are the most common, accounting for 50 to 75% of identified agents [1]. In the Americas, the most common arboviruses related to encephalitis are West Nile virus (WNV) and St. Louis encephalitis virus (SLEV) [1]. On the other hand, encephalitis has uncommonly been associated with Dengue (DENV), Chikungunya (CHIKV), and Zika (ZIKV) viral infections.
Læs mere Tjek på PubMedStefanie Reiter, Ting Sun, Sabine Gärtner, Stefan Pöhlmann, Michael Winkler
PLoS One Infectious Diseases, 15.05.2024
Tilføjet 15.05.2024
by Stefanie Reiter, Ting Sun, Sabine Gärtner, Stefan Pöhlmann, Michael Winkler Non-human primate (NHP)-based model systems are highly relevant for biomedical research. However, only few NHP cell lines are available and the generation of additional cell lines is an urgent need to help in the refinement and replacement of these models. Using lentiviral transduction of c-Fos, we established cell lines from the brain of rhesus macaques (Macaca mulatta). Transcriptome analysis revealed that these cell lines are closely related to astrocytes, which was confirmed by immunoblot and immunofluorescence microscopy detecting expression of the astrocyte marker glial fibrillary acidic protein (GFAP). Quantitative real-time PCR (qRT-PCR) demonstrated that major pathways of the interferon (IFN) system are intact. Using retroviral pseudotypes we found that the cell lines are susceptible to entry driven by the glycoproteins of vesicular stomatitis virus (VSV), lymphocytic choriomeningitis virus (LCMV) and to a lesser extent influenza A virus (IAV). Finally, these cells supported growth of Zika virus (ZIKV) and Papiine alphaherpesvirus 2 (PaHV2). In summary, we developed IFN-responsive cell lines from the rhesus macaque brain that allowed entry driven by several viral glycoproteins and were permissive to infection with ZIKV and a primate simplexvirus. These cell lines will be useful for efforts to analyze neurotropic viral infections in rhesus macaque models.
Læs mere Tjek på PubMedApolinar M. Hernández, Luis D. Alcaraz, Cristóbal Hernández-Álvarez, Miguel F. Romero, Angélica Jara-Servín, Hugo Barajas, Carlos M. . Ramírez, Mariana Peimbert
PLoS One Infectious Diseases, 29.04.2024
Tilføjet 29.04.2024
by Apolinar M. Hernández, Luis D. Alcaraz, Cristóbal Hernández-Álvarez, Miguel F. Romero, Angélica Jara-Servín, Hugo Barajas, Carlos M. . Ramírez, Mariana Peimbert The mosquito Aedes spp. holds important relevance for human and animal health, as it serves as a vector for transmitting multiple diseases, including dengue and Zika virus. The microbiome’s impact on its host’s health and fitness is well known. However, most studies on mosquito microbiomes have been conducted in laboratory settings. We explored the mixed microbial communities within Aedes spp., utilizing the 16S rRNA gene for diversity analysis and shotgun metagenomics for functional genomics. Our samples, which included Ae. aegypti and Ae. albopictus, spanned various developmental stages—eggs, larvae, and adults—gathered from five semiurban areas in Mexico. Our findings revealed a substantial diversity of 8,346 operational taxonomic units (OTUs), representing 967 bacterial genera and 126,366 annotated proteins. The host developmental stage was identified as the primary factor associated with variations in the microbiome composition. Subsequently, we searched for genes and species involved in mosquito biocontrol. Wolbachia accounted for 9.6% of the 16S gene sequences. We observed a high diversity (203 OTUs) of Wolbachia strains commonly associated with mosquitoes, such as wAlb, with a noticeable increase in abundance during the adult stages. Notably, we detected the presence of the cifA and cifB genes, which are associated with Wolbachia’s cytoplasmic incompatibility, a biocontrol mechanism. Additionally, we identified 221 OTUs related to Bacillus, including strains linked to B. thuringiensis. Furthermore, we discovered multiple genes encoding insecticidal toxins, such as Cry, Mcf, Vip, and Vpp. Overall, our study contributes to the understanding of mosquito microbiome biodiversity and metabolic capabilities, which are essential for developing effective biocontrol strategies against this disease vector.
Læs mere Tjek på PubMedT, Angel Miraclin; Singh, Bhagteshwar; Rupali, Priscilla
Current Opinion in Infectious Diseases, 24.04.2024
Tilføjet 24.04.2024
Purpose of review Emerging and re-emerging central nervous system (CNS) infections are a major public health concern in the tropics. The reasons for this are myriad; climate change, rainfall, deforestation, increased vector density combined with poverty, poor sanitation and hygiene. This review focuses on pathogens, which have emerged and re-emerged, with the potential for significant morbidity and mortality. Recent findings In recent years, multiple acute encephalitis outbreaks have been caused by Nipah virus, which carries a high case fatality. Arboviral infections, predominantly dengue, chikungunya and Zika are re-emerging increasingly especially in urban areas due to changing human habitats, vector behaviour and viral evolution. Scrub typhus, another vector borne disease caused by the bacterium Orientia tsutsugamushi, is being established as a leading cause of CNS infections in the tropics. Summary A syndromic and epidemiological approach to CNS infections in the tropics is essential to plan appropriate diagnostic tests and management. Rapid diagnostic tests facilitate early diagnosis and thus help prompt initiation and focusing of therapy to prevent adverse outcomes. Vector control, cautious urbanization and deforestation, and reducing disturbance of ecosystems can help prevent spread of vector-borne diseases. Regional diagnostic and treatment approaches and specific vaccines are required to avert morbidity and mortality.
Læs mere Tjek på PubMedPatricia Martins, Richardson Warley Siqueira Luzia, Jair Alves Pereira Filho, Kelly Silva Welsh, Cíntia Fuzikawa, Rodrigo Nicolato, Márcia Mascarenhas Alemão, Márcio Augusto Gonçalves, José Carlos Cavalheiro, Ianny Dumont Ávila, Ricardo Teixeira Veiga
PLoS One Infectious Diseases, 23.04.2024
Tilføjet 23.04.2024
by Patricia Martins, Richardson Warley Siqueira Luzia, Jair Alves Pereira Filho, Kelly Silva Welsh, Cíntia Fuzikawa, Rodrigo Nicolato, Márcia Mascarenhas Alemão, Márcio Augusto Gonçalves, José Carlos Cavalheiro, Ianny Dumont Ávila, Ricardo Teixeira Veiga Burnout is most commonly defined as a syndrome characterized by emotional exhaustion, cynicism, and ineffectiveness, which occurs in response to chronic stressors at work. It can adversely affect health workers’ physical and mental health, and the quality of care provided. The COVID-19 pandemic increased stressors and could impact burnout prevalence in this group. There is a lack of information regarding the prevalence of burnout among hospital health workers in Brazil. A newer definition of burnout has been proposed that considers three different clinical profiles: the frenetic, underchallenged and worn-out subtypes. This differentiation could lead to interventions tailored for each subtype. The present study aimed to estimate the prevalence of burnout, its subtypes, and associated factors in workers of a public hospital network in Brazil, during the pandemic. A total of 143 randomly selected participants answered an online form that included sociodemographic and occupational items, and the Burnout Clinical Subtypes Questionnaire, a summarized version. This questionnaire evaluates three burnout dimensions (overload, lack of development, neglect) that can be used to discriminate the three burnout subtypes (frenetic, underchallenged, worn-out, respectively); higher scores indicate higher burnout levels. The prevalence of burnout was high (53.85%), similar to other studies during the pandemic. The most common subtypes were ‘frenetic’ (34.97%), characterized by increased efforts to meet work demands, to the point of neglecting personal needs, and ‘lack of development’ (23.78%), characterized by a sense that work is uninteresting and does not contribute to personal development, and a perfunctory behavior towards tasks. Age was associated with burnout: workers with less than 51 years presented higher levels of burnout. These findings indicate the need for effective interventions to prevent and/or treat burnout. The assessment of burnout subtypes can allow managers to better understand the processes affecting employees, and inform actions to improve workforce health.
Læs mere Tjek på PubMedCatherine Offord
Science, 18.04.2024
Tilføjet 18.04.2024
American Journal of Tropical Medicine and Hygiene, 3.04.2024
Tilføjet 3.04.2024
Journal Name: The American Journal of Tropical Medicine and Hygiene Volume: 110 Issue: 4 Pages: 724-730
Læs mere Tjek på PubMedAmerican Journal of Tropical Medicine and Hygiene, 3.04.2024
Tilføjet 3.04.2024
Journal Name: The American Journal of Tropical Medicine and Hygiene Volume: 110 Issue: 4 Pages: 731-737
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