Search results for "Malaria"
showing 9 items of 169 documents
Evaluation of the efficacy of a new insecticide paint against malaria vectors
2015
La malaria continúa siendo un problema de salud pública global. Se calcula que en el mundo hay 3.300 millones de personas en 97 países y territorios que corren el riesgo de padecer el paludismo, y que para 1.200 millones ese riesgo es elevado (WHO, 2014). El control de la malaria a gran escala está altamente basado en al control del vector, principalmente mediante el uso de mosquiteras tratadas con insecticidas de larga duración (LLINs), y en menor medida, el Rociamiento Residual Intradomiciliario. Todos los tratamientos recomendados de LLINs y la mayoría del Rociamiento Residual Intradomiciliario se basan en el uso de piretroides. La creciente resistencia de los vectores de malaria a los p…
El pensament etiològic microbià i el paludisme (1880-1900)
2001
S'estudia l'evolució etiològica sobre el paludisme des de 1880 a 1990. Els vint anys estudiats permeten comprovar que la teoria miasmàtica que interpretava l'origen del paludisme va deixar pas a l'explicació microbiana causal sense a penes un altre canvi que la identificació del miasma palúdic amb l'hematozou de Laveran. Només el descobriment del mosquit anòfel com a vector de transmissió del paràsit va fer que se substituís la via respiratòria per la inoculació cutània com a mecanisme d'infecció. L’aire dels pantans no era ja el perjudicial, sinó les seues aigües estancades, el lloc on es criaven les larves dels mosquits, l'eliminació dels quals va convertir-se en el centre de la lluita an…
Data from: Continental-scale patterns of pathogen prevalence: a case study on the corncrake
2014
Pathogen infections can represent a substantial threat to wild populations, especially those already limited in size. To determine how much variation in the pathogens observed among fragmented populations is caused by ecological factors, one needs to examine systems where host genetic diversity is consistent among the populations, thus controlling for any potentially confounding genetic effects. Here, we report geographic variation in haemosporidian infection among European populations of corncrake. This species now occurs in fragmented populations, but there is little genetic structure and equally high levels of genetic diversity among these populations. We observed a longitudinal gradient…
A systematic review on the efficacy and safety of chloroquine for the treatment of COVID-19
2020
Purpose COVID-19 (coronavirus disease 2019) is a public health emergency of international concern. As of this time, there is no known effective pharmaceutical treatment, although it is much needed for patient contracting the severe form of the disease. The aim of this systematic review was to summarize the evidence regarding chloroquine for the treatment of COVID-19. Methods PubMed, EMBASE, and three trial Registries were searched for studies on the use of chloroquine in patients with COVID-19. Results We included six articles (one narrative letter, one in-vitro study, one editorial, expert consensus paper, two national guideline documents) and 23 ongoing clinical trials in China. Chloroqui…
Hyperpigmentation of hard palate induced by chloroquine therapy
2017
The antimalarials are one of the most commonly prescribed drugs for conditions such as lupus erythematosus and rheumatoid arthritis, and the side effects, though infrequent, are well known. The antimalarial agent chloroquine diphosphate usually causes pigmentary changes in the oral mucosa characterized by a bluish-grey to black discolorations mainly in the hard palate. Considering only the hard palate hyperpigmentation caused by chloroquine, to the best of our knowledge, only 13 cases have been reported in the English language literature. We described an additional case of palate hyperpigmentation related to the chronic use of chloroquine diphosphate in a 60-year-old Mexican woman. Although…
Diseño, síntesis y evaluación de compuestos con potencial actividad antimalárica. Preparación y aplicabilidad de imidazolinas en nuevos organocataliz…
2017
La tesis que a continuación se expone es una tesis multidisciplinar dado que abarca distintos ámbitos de la química orgánica. El primer capítulo se centra principalmente en el ámbito de la química médica, donde se discute el diseño, la síntesis y la evaluación biológica de cuatro familias de compuestos con potencial actividad antimalárica. Para el desarrollo de este trabajo se establece un convenio de colaboración con la empresa farmacéutica GSK, la cual lleva a cabo la evaluación biológica de todos los compuestos sintetizados. GSK ha publicado en una base de datos de acceso público los resultados obtenidos en screenings de compuestos que inhiben el crecimiento de P. falciparum. El desarrol…
Synthesis and Molecular Modeling Studies of Derivatives of a Highly Potent Peptidomimetic Vinyl Ester as Falcipain-2 Inhibitors
2012
Herein we report the synthesis of a set of constrained peptidomimetics endowed with an electrophilic vinyl ester warhead and structurally related to a previously identified lead compound, a potent and irreversible inhibitor of falcipain-2 (FP-2). FP-2 is the main hemoglobinase of the malaria parasite P. falciparum. The new compounds were evaluated for their inhibition against FP-2, and the results were rationalized on the basis of docking experiments. These studies underscore the pivotal role of both the ester function at the P1' site and the trifluoromethyl group of the P3 side chain in determining the correct orientation of the Michael acceptor warhead in the catalytic site, and as a cons…
Amphoteric polyamidoamines in the treatment of malaria
2012
The present invention relates to the use of amphoteric polyamidoamines with MW of 10-100 kDa as antimalarial agents or carriers of antimalarial drugs and to formulations thereof.
Data from: Impact of host nutritional status on infection dynamics and parasite virulence in a bird-malaria system
2013
1. Host resources can drive the optimal parasite exploitation strategy by offering a good or a poor environment to pathogens. Hosts living in resource-rich habitats might offer a favourable environment to developing parasites because they provide a wealth of resources. However, hosts living in resource-rich habitats might afford a higher investment into costly immune defences providing an effective barrier against infection. Understanding how parasites can adapt to hosts living in habitats of different quality is a major challenge in the light of the current human-driven environmental changes. 2. We studied the role of nutritional resources as a source of phenotypic variation in host exploi…