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[This corrects the article DOI: 10.1371/journal.pntd.0009418.].
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The coronavirus pandemic is a major public health crisis affecting global health systems with dire socioeconomic consequences, especially in vulnerable regions such as Latin America (LATAM). There is an urgent need for a vaccine to help control contagion, reduce mortality and alleviate social costs. In this study, we propose a rational multi-epitope candidate vaccine against SARS-CoV-2. Using bioinformatics, we constructed a library of potential vaccine peptides, based on the affinity of the most common major human histocompatibility complex (HLA) I and II molecules in the LATAM population to predict immunological complexes among antigenic, non-toxic and non-allergenic peptides extracted from the conserved regions of 92 proteomes. Although HLA-C, had the greatest antigenic peptide capacity from SARS-CoV-2, HLA-B and HLA-A, could be more relevant based on COVID-19 risk of infection in LATAM countries. We also used three-dimensional structures of SARS-CoV-2 proteins to identify potential regions for antibody production. The best HLA-I and II predictions (with increased coverage in common alleles and regions evoking B lymphocyte responses) were grouped into an optimized final multi-epitope construct containing the adjuvants Beta defensin-3, TpD, and PADRE, which are recognized for invoking a safe and specific immune response. Finally, we used Molecular Dynamics to identify the multi-epitope construct which may be a stable target for TLR-4/MD-2. This would prove to be safe and provide the physicochemical requirements for conducting experimental tests around the world.
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Mayaro virus (MAYV) is an arbovirus that is endemic to tropical forests in Central and South America, particularly within the Amazon basin. In recent years, concern has increased regarding MAYV's ability to invade urban areas and cause epidemics across the region. We conducted a systematic literature review to characterise the evolutionary history of MAYV, its transmission potential, and exposure patterns to the virus. We analysed data from the literature on MAYV infection to produce estimates of key epidemiological parameters, including the generation time and the basic reproduction number, R0. We also estimated the force-of-infection (FOI) in epidemic and endemic settings. Seventy-six publications met our inclusion criteria. Evidence of MAYV infection in humans, animals, or vectors was reported in 14 Latin American countries. Nine countries reported evidence of acute infection in humans confirmed by viral isolation or reverse transcription-PCR (RT-PCR). We identified at least five MAYV outbreaks. Seroprevalence from population based cross-sectional studies ranged from 21% to 72%. The estimated mean generation time of MAYV was 15.2 days (95% CrI: 11.7-19.8) with a standard deviation of 6.3 days (95% CrI: 4.2-9.5). The per-capita risk of MAYV infection (FOI) ranged between 0.01 and 0.05 per year. The mean R0 estimates ranged between 2.1 and 2.9 in the Amazon basin areas and between 1.1 and 1.3 in the regions outside of the Amazon basin. Although MAYV has been identified in urban vectors, there is not yet evidence of sustained urban transmission. MAYV's enzootic cycle could become established in forested areas within cities similar to yellow fever virus.
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Infecções por Alphavirus/epidemiologia , Alphavirus/classificação , Surtos de Doenças , Modelos Biológicos , Alphavirus/genética , Infecções por Alphavirus/virologia , Evolução Biológica , HumanosRESUMO
La Diabetes Mellitus (DM) representa una de las Enfermedades Crónicas No Transmisibles (ECNT) más prevalentes del mundo, cuyas complicaciones agudas o emergencias hiperglucémicas más importantes, en el escenario de la medicina de urgencias, son la Cetoacidosis Diabética (CAD), el Estado Hiperglucémico Hiperosmolar (EHH) y la Hipoglucemia, todas ellas asociadas a un control inadecuado o insuficiente de la enfermedad. Con el objetivo de mejorar eficazmente la condición clínica de los pacientes que presentan algún tipo de emergencia hiperglucémica, los médicos del servicio de urgencias deben tener claridad en diversos aspectos clave relacionados con la fisiopatología y el abordaje apropiado para cada situación. En este artículo se reúne la información más actualizada respecto a la definición, epidemiología, etiopatogenia, manifestaciones clínicas, diagnóstico, tratamiento y prevención, de las tres complicaciones agudas de la DM, a fin de ofrecer al clínico una guía práctica para el abordaje y manejo adecuado de los pacientes diabéticos en el contexto de las emergencias hiperglucémicas.
Diabetes Mellitus (DM) represents one of the most prevalent Chronic Noncommunicable Diseases (NCDs) in the world, which acute complications or major hyperglycemic emergencies, in the scenario of emergency medicine, are Diabetic Ketoacidosis (DKA), the State Hyperosmolar hyperglycemic (EHH) and Hypoglycaemia, all associated with inadequate or insufficient control of the disease. In order to effectively improve the clinical condition of patients presenting with some type of hyperglycaemic emergency, emergency department physicians should be clear about various key aspects related to the pathophysiology and the appropriate approach for each situation. This article gathers the most up-to-date information regarding the definition, epidemiology, etiopathogenesis, clinical manifestations, diagnosis, treatment and prevention of the three acute complications of DM mentioned above, in order to offer the clinician a practical guide for the approach and proper management of diabetic patients in the context of hyperglycemic emergencies.
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Diabetes Mellitus/epidemiologia , Cetoacidose Diabética/epidemiologia , Complicações do Diabetes , Diabetes Mellitus/terapia , Hiperglicemia/epidemiologia , Hipoglicemia/epidemiologiaRESUMO
La infección por VIH confiere al portador la susceptibilidad para desarrollar un conjunto de infecciones que normalmente no serían encontradas en un paciente inmunocompetente. En Colombia, en el año 2015, se reportaron 11.606 casos de infección por VIH. En este escrito documentamos el caso de un paciente con diagnóstico de infección por VIH, el cual desarrolló lesiones típicas de infección por el virus Varicela Zoster, y se documentó la evolución de las lesiones vesiculares hacia flictenas con necrosis local. Dada la presentación del caso, el diagnóstico de lesiones en piel en pacientes inmunocomprometidos o con infección por VIH se convierte en un reto para el profesional de la salud a la hora de establecer un diagnóstico etiológico, a fin de establecer un adecuado tratamiento de acuerdo a este.
HIV infection makes HIV carriers susceptible to develop a group of infections that would not normally be found in an immunocompetent patient. In Colombia, a total of 11,606 cases of HIV infection were reported in 2015. This paper documents the case of a patient diagnosed with HIV infection, who developed lesions typically caused by the varicellazoster virus. These vesicular lesions evolved into phlyctenas with local necrosis. Given the case presentation, the diagnosis of skin lesions in immunocompromised or HIV-infected patients becomes a challenge for health professionals when determining an etiological diagnosis, in order to establish an appropriate treatment.
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La tuberculosis gastrointestinal es una patología rara y difícil de diagnosticar, que está asociada con diversos factores sociales y económicos, así como con el estado de salud de la víctima. Este relato de caso se realizó sobre la tuberculosis intestinal en el Departamento de Boyac, en el que se describen los principales aspectos clínicos, paraclínicos, el proceso de diagnóstico y el plan de manejo en el paciente. La afectación gastrointestinal de la tuberculosis tiene una baja incidencia, siendo el sexto lugar de compromiso. Los signos y síntomas manifestados por el paciente no son específicos ya menudo el personal de salud sospecha y primero se centra en otras enfermedades que son más frecuentes. A partir de este caso médico, se ponen de relieve las diversas sospechas diagnósticas que se plantearon en el curso de la enfermedad con el fin de lograr un diagnóstico de la tuberculosis intestinal, lo que proporciona una mayor orientación para que los médicos tengan en cuenta esta enfermedad en su práctica clínica.
Gastrointestinal tuberculosis is a rare and difficult pathology to diagnose, which is associated with various social and economic factors as well as the state of health of the sufferer. This case report was made about intestinal tuberculosis in the Department of Boyac , in which the main clinical, paraclinical, the process of diagnosis and management plan in place in the patient are described. Gastrointestinal involvement of tuberculosis has a low incidence, being the sixth place of commitment. Signs and symptoms manifested by the patient are not specific and often the health staff suspect and first focuses on other diseases that are more prevalent. From this medical case, the various diagnostic suspicions that were raised in the course of the disease are emphasized in order achieve a diagnosis of the intestinal tuberculosis, which provides a higher guidance for doctors to take this disease into account in their clinical practice.
