Listar Microbiología por título
Mostrando ítems 41-60 de 1169
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A snake venom secreted phospholipase A2 induces foam cell formation depending on the activation of factors involved in lipid homeostasis
(2018-06)MT-III, a snake venom GIIA sPLA2, which shares structural and functional features with mammalian GIIA sPLA2s, activates macrophage defense functions including lipid droplet (LDs) formation, organelle involved in both lipid ... -
A snapshot view of some vertical distributions of water parameters at a deep (200 m) station in the fjord-like Golfo Dulce, embayment, Costa Rica
(2006-09-01)Temperature, salinity, dissolved oxygen and inorganic nutrients were measured at a single station in the water column (200 m) of Golfo Dulce, a fjord-like embayment on the Pacific coast of Costa Rica, from June 1993 ... -
A structure-based proposal for a comprehensive myotoxic mechanism of phospholipase A2-like proteins from viperid snake venoms
(Biochimica et Biophysica Acta - Proteins and Proteomics 1844(12):2265-2276, 2014-12)Envenomation via snakebites is an important public health problem in many tropical and subtropical countries that, in addition to mortality, can result in permanent sequelae as a consequence of local tissue damage, which ... -
Ability of a polyvalent antivenom to neutralize the venom of Lachesis muta melanocephala, a new Costa Rican subspecies of the bushmaster
(1987)Several toxic and enzymatic activities of the venom of L. m. melanocephala were studied. This venom has many similarities with that of L. m. stenophrys, although there are quantitative differences in venom activities, as ... -
Ability of fucoidan to prevent muscle necrosis induced by snake venom myotoxins: comparison of high- and low-molecular weight fractions
(2008)Fucoidan, a natural polysaccharide extracted from brown seaweed, inhibits the myotoxic phospholipases A2 present in the venoms of crotalid snakes. This study evaluated the influence of molecular weight on the ability of ... -
Ability of six Latin American antivenoms to neutralize the venom of mapaná equis (Bothrops atrox) from Antioquia and Chocó (Colombia)
(1995-06)This investigation compared the ability of six Latin American antivenoms (monovalent antibothropic INS, Santafé de Bogotá; polyvalent INS; polyvalent probiol, Santafé de Bogotá; antibothropic Instituto Butantan, IB, São ... -
Acanthamoeba genotype T4 keratitis in a patient with Thygeson’s superficial punctate keratitis
(2017-01)A case of amoebic keratitis due to Acanthamoeba genotype T4 is reported. The patient is a 74-year old woman with Thygeson’s superficial punctate keratitis. Corneal scrapings were employed for the diagnosis, which included ... -
Accelerated biodegradation of selected nematicides in tropical crop soils from Costa Rica
(2014)Degradation and mineralization behavior of select ed nematicides was studied in soil samples from fields culti vated with banana, potato, and coffee. Degradation assays in most of the studied soils revealed shorter ... -
Activation of cellular functions in macrophages by venom secretory Asp-49 and Lys-49 phospholipases A2
(2005-10)The in vitro effects of myotoxin III (MT-III), an Asp-49 catalytically-active phospholipase A(2), and myotoxin II (MT-II), a catalytically-inactive Lys-49 variant, isolated from Bothrops asper snake venom, on phagocytosis ... -
Activation of the lytic program of the Epstein–Barr virus in Burkitt's lymphoma cells leads to a two steps downregulation of expression of the proapoptotic protein BimEL, one of which is EBV-late-gene expression dependent
(Virology 387 (2009) (1) p.41.49, 2009-02-28)The Epstein–Barr virus (EBV) generally latently infects its target cells with expression of genes conferring resistance to apoptosis. However, the modulation of apoptotic signals during lytic cycle remains poorly understood. ... -
Actividad de enzimas antioxidantes eritrocitarias en una muestra de adultos jóvenes y mayores del Valle Central, Costa Rica
(2018)Introducción. El daño oxidativo provocado por los radicales libres de oxígeno está relacionado con el proceso de envejecimiento, diversas patologías y el estilo de vida de las personas, pero en el organismo existen defensas ... -
Actividad letal de seis venenos de serpientes de importancia médica en el Ecuador
(2016-11)Se determinó la actividad letal de los venenos de serpientes de seis especies de vipéridos colectadas en Ecuador, a través de ratones CD-1. La especie más abundante fue Bothrops asper de la cual se analizaron adultos y ... -
La actividad proteolítica de los venenos de serpientes de Costa Rica sobre la caseína
(Revista de Biologia Tropical 31(1), 37-40, 1983)Se establecen las condiciones óptimas para la determinación comparativa de la actividad proteolítica de los venenos de serpientes costarricenses sobre la caseína y se describe dicha actividad para 13 venenos diferentes. ... -
Activity of hemorrhagic metalloproteinase BaH-1 and myotoxin II from Bothrops asper snake venom on capillary endothelial cells in vitro
(1994-04)In vivo, hemorrhagic toxins isolated from snake venoms cause a disorganization of the basal lamina of capillaries, with a concomitant degenerative process of endothelial cells. In this study we investigated the effects of ... -
Actualización de la Terapia Antitrombótica
(2018)La hemostasia es un proceso dinámico que tiene como componentes principales a las plaquetas, la cascada de coagulación y el sistema fibrinolítico; todos elementos fundamentales para el correcto funcionamiento de la ... -
Acute physiopathological effects of honeybee (Apis mellifera) envenoming by subcutaneous route in a mouse model
(2010)Bee stings are a health concern in the Americas, where fatal envenomings due to massive attacks by Africanized honeybees have been documented in the last decades. Most studies on the toxic effects of honeybee venom in ... -
Acute-phase reactions, including cytokines, in patients bitten by Bothrops and Crotalus snakes in Brazil
(1995)Thirty-one patients bitten by venomous snakes in Botucatu area (State of São Paulo - Brazil), sixteen by Bothrops spp. and fifteen by Crotalus durissus terrificus, were studied. The group comprised twenty-nine males and ... -
Aedes albopictus (Skuse) en la Región Huetar Atlántica de Costa Rica: estudios preliminares sobre ecología larval
(2012)Objetivo: Determinar las características de los hábitats larvales de Ae. albopictus y su culicidofauna asociada en la comunidad “La Primavera”. Métodos: Se realizó una encuesta larval en 20 de 28 casas ubicadas en un área ... -
Agentes bacterianos asociados al cáncer colorrectal y su potencial uso como biomarcadores
(2021)Existe una asociación epidemiológica del CCR con los tres agentes bacterianos tratados en esta revisión. Estos se han encontrado en tejido epitelial tumoral y en menor medida en tejido colónico adyacente sano, así como ...