Listar Microbiología por título
Mostrando ítems 179-198 de 1169
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Brucella abortus Induces the Premature Death of Human Neutrophils through the Action of Its Lipopolysaccharide
(2015-05-06)Most bacterial infections induce the activation of polymorphonuclear neutrophils (PMNs), enhance their microbicidal function, and promote the survival of these leukocytes for protracted periods of time. Brucella abortus ... -
Brucella abortus Strain 2308 Wisconsin Genome: Importance of the Definition of Reference Strains
(2016-09-29)Brucellosis is a bacterial infectious disease affecting a wide range of mammals and a neglected zoonosis caused by species of the genetically homogenous genus Brucella. As in most studies on bacterial diseases, research ... -
Brucella canis Is an Intracellular Pathogen That Induces a Lower Proinflammatory Response than Smooth Zoonotic Counterparts
(2015-11-10)Canine brucellosis caused by Brucella canis is a disease of dogs and a zoonotic risk. B. canis harbors most of the virulence determinants defined for the genus, but its pathogenic strategy remains unclear since it has not ... -
Brucella Genetic Variability in Wildlife Marine Mammals Populations Relates to Host Preference and Ocean Distribution
(2017)Intracellular bacterial pathogens probably arose when their ancestor adapted from a free-living environment to an intracellular one, leading to clonal bacteria with smaller genomes and less sources of genetic plasticity. ... -
Brucella neotomae Infection in Humans, Costa Rica
(2017-06)Several species of Brucella are known to be zoonotic, but B. neotomae infection has been thought to be limited to wood rats. In 2008 and 2011, however, B. neotomae was isolated from cerebrospinal fluid of 2 men with ... -
Brucellosis caused by the wood rat pathogen Brucella neotomae: two case reports
(2017-12-19)Background: Brucellosis is a chronic bacterial disease caused by members of the genus Brucella. Among the classical species stands Brucella neotomae, until now, a pathogen limited to wood rats. However, we have identified two ... -
Brucellosis in mammals of Costa Rica: An epidemiological survey
(2017-08-09)Brucellosis has been an endemic disease of cattle and humans in Costa Rica since the beginning of XX century. However, brucellosis in sheep, goats, pigs, water buffaloes, horses and cetaceans, has not been reported in the ... -
Butanol production by Clostridium beijerinckii BA101 using cassava flour as fermentation substrate: enzymatic versus chemical pretreatments
(2011)Cassava flour (CF), a cost-effective source of starch, was employed as a substrate for successful acetone butanol-ethanol (ABE) production by batch-fermentation with Clostridium beijerinckii. The effect of temperature, initial ... -
Búsqueda de terapias antimicrobianas alternativas: potencial antimicrobiano del veneno de serpientes
(2021)La resistencia a los antimicrobianos genera una inminente crisis de salud pública que amenaza con aumentar en los próximos años. Desde hace varias décadas organismos internacionales se han preocupado por llamar la atención ... -
Calcium imaging of muscle cells treated with snake myotoxins reveals toxin synergism and presence of acceptors
(2009-04-17)Snake myotoxins have a great impact on human health worldwide. Most of them adopt a phospholipase A2 fold and occur in two forms which often co-exist in the same venom: the Asp49 toxins hydrolyse phospholipids, whilst Lys49 ... -
Calcium ion independent membrane leakage induced by phospholipase-like myotoxins
(1992-12)The two snake venom myotoxins ammodytin L and myotoxin II, purified respectively from Vipera ammodytes ammodytes and Bothrops asper, have phospholipase-like structures but lack an Asp-49 in the active site and are without ... -
Calcium plays a key role in the effects induced by a snake venom Lys49 phospholipase A2 homologue on a lymphoblastoid cell line
(2006-01)A catalytically-inactive Lys49 phospholipase A2 homologue from the venom of the snake Bothrops asper induces diverse effects (necrosis, apoptosis and proliferation) in a lymphoblastoid cell line, depending on the toxin ... -
Calidad bacteriológica y desechos sólidos en cinco ambientes costeros de Costa Rica
(2006-09-01)Anthropogenic waste and water bacteriological quality were surveyed twice a year in 2000 and in 2002 at five coastal marine environments in Costa Rica, one in the Caribbean (Moín Bay) and four in the Pacific (Culebra ... -
Calidad fisicoquímica y microbiológica del agua costera en Nicoya, Costa Rica: comparación de tres playas con diferente impacto turístico y administración
(2023-12)El crecimiento socioeconómico ha causado presión sobre los ecosistemas marinos, y existe poca información que pueda ser utilizada para el manejo de playas en Nicoya, Costa Rica. Objetivo: Determinar la calidad fisicoquímica ... -
Cambios en el patrón electroforético del veneno de cascabela muda (Lachesis muta stenophrys) durante el almacenamiento bajo diferentes condiciones
(1985)Liquid and lyophilized samples of Lachesis muta venom were stored at different temperatures and for different periods of time, and analyzed by polyacrylamide gel electrophoresis (PAGE) and immunoelectrophoresis. Only slight ... -
Cambios post mortem en mucosa intestinal y tejido pulmonar de Mus musculus, observados al microscopio electrónico de barrido
(Revista de Biología Tropical 29(2) p.265-272, 1981)Post mortem ultrastructural alterations of surface epithelial tissues were studied by scanning electron microscopy. Ten male albino mice were sacrificed, and the duodenum, ileum arid lung excised and fixed immediately, ... -
‘Candidatus Rickettsia nicoyana’: A novel Rickettsia species isolated from Ornithodoros knoxjonesi in Costa Rica
(2017-06)Rickettsiae are intracellular bacteria commonly associated with hematophagous arthropods. Most of them have been described in hard ticks, but some have been found in soft ticks. Here we report the detection and isolation ... -
Caprylic acid fractionation of hyperimmune horse plasma: description of a simple procedure for antivenom production
(1994)A simple methodology for hyperimmune horse plasma fractionation, based on caprylic acid precipitation, is described. Optimal conditions for fractionation were studied; the method gives best results when concentrated caprylic ... -
Caracterización bioquímica y biológica de inhibidores endógenos de veneno presentes en el plasma de la serpiente Crotalus simus (Serpentes: Viperidae)
(2022)Las serpientes venenosas presentan una mezcla compleja de toxinas de origen proteico con diferentes actividades farmacológicas. Un mecanismo de resistencia que las serpientes y otros organismos presentan contra estas toxinas ...