Base de dados : LILACS
Pesquisa : B01.050.500.308 [Categoria DeCS]
Referências encontradas : 36 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 4 ir para página            

  1 / 36 LILACS  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: lil-474722
Autor: Vallejo, Martha; Acosta, Alberto.
Título: Lista de corales hermatípicos del Museo Javeriano de Historia Natural Lorenzo Uribe S.J., Colombia / List of corals hermatípicos of the Museum Javeriano of Natural History Lorenzo Uribe S.J., Colombia
Fonte: NOVA publ. cient;3(4):100-104, 2005. tab.
Idioma: es.
Resumo: Las colecciones biológicas de diferentes museos en un país son material complementario que sirven para estudios e investigaciones sobre biodiversidad, ya que además de la información sobre los especimenes preservados, ofrecen instrumentos para crear vínculos y relaciones entre sí. La presente nota, ilustra la importancia de la complementariedad entre colecciones: Museo Javeriano; MUJ y Museo de Historia Natural Marino de Colombia; MHNMC, para un mismo grupo biológico, los corales hermatípicos. La nomenclatura de especies utilizadas fue siguiendo a Veron (2000). El MUJ busca participar con su colección de referencia (29 especies, 129 registros biológicos) en proyectos nacionales e internacionales, compartiendo información, para de esta manera aportar al conocimiento y estudio de la biodiversidad.
Descritores: Antozoários/classificação
Classificação
Cnidários/classificação
Responsável: CO176.1 - Biblioteca Jorge Bejarano


  2 / 36 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Costa Rica
Texto completo
Texto completo
Id: lil-753733
Autor: Sánchez, Juan Armando; Ballesteros, Diana.
Título: The invasive snowflake coral (Carijoa riisei) in the Tropical Eastern Pacific, Colombia / El coral copo de nieve invasivo (Carijoa riisei) en el Pacífico Oriental Tropical, Colombia
Fonte: Rev. biol. trop;62(supl.1):199-207, feb. 2014. ilus, graf, mapas.
Idioma: en.
Resumo: Carijoa riisei (Octocorallia: Cnidaria), a western Atlantic species, has been reported in the Pacific as an invasive species for nearly forty years. C. riisei has been recently observed overgrowing native octocorals at several rocky-coral littorals in the Colombian Tropical Eastern Pacific-(TEP). C. riisei has inhabited these reefs for at least 15 years but the aggressive overgrowth on other octocorals have been noted until recently. Here, we surveyed for the first time the distribution and inter-specific aggression by C. riisei in both coastal and oceanic areas colonized in the Colombian TEP (Malpelo, Gorgona and Cabo Corrientes), including preliminary multiyear surveys during 2007-2013. We observed community-wide octocoral mortalities (including local extinction of some Muricea spp.) and a steady occurrence of competing and overgrowing Pacifigorgia seafans and Leptogorgia seawhips. In Gorgona Island, at two different sites, over 87% (n=77 tagged colonies) of octocorals (Pacifigorgia spp. and Leptogorgia alba) died as a result of C. riisei interaction and/or overgrowth between 2011 and 2013. C. riisei overgrows octocorals with an estimate at linear growth rate of about 1cm m-1. The aggressive overgrowth of this species in TEP deserves more attention and regular monitoring programs. Rev. Biol. Trop. 62 (Suppl. 1): 199-207. Epub 2014 February 01.

Carijoa riisei (Octocorallia: Cnidaria), una especie nativa del Atlántico Occidental. Sin embargo, se ha reportado como especie exótica invasora en el Pacífico desde hace unos cuarenta años y en la costa occidental de Colombia hace 15-20 años. Recientemente C. riisei se ha observado sobrecreciendo octocorales nativos en varios litorales rocosos coralinos en el Pacífico Oriental Tropical-(POT) de Colombia. C. riisei ha habitado estos arrecifes durante al menos 15 años, pero este comportamiento agresivo frente a otros octocorales no se habían notado hasta hace unos pocos años. En este estudio, se evalúa por primera vez, en las zonas costeras y oceánicas, la distribución e incidencia C. riisei en otros octocorales del POT colombiano (Malpelo, Gorgona y Cabo Corrientes), incluyendo información observaciones entre 2007-2013. Hemos observado mortalidad en toda la comunidad de octocorales (incluyendo la extinción local de algunas especies de Muricea) y una constante competencia y cubrimiento de abanicos de mar Pacifigorgia y gorgonáceos Leptogorgia. C. riisei presento una tasa lineal de crecimiento sobre otros octocorales de aproximadamente 1 cm m-1. El comportamiento agresivo de C. riisei en el POT merece más atención y programas regulares de monitoreo.
Descritores: Cnidários/crescimento & desenvolvimento
Antozoários/classificação
Espécies Introduzidas
-Colômbia
Recifes de Corais
Tipo de Publ: Estudo Comparativo
Revisão
Responsável: CR1.1 - BINASSS - Biblioteca Nacional de Salud y Seguridad Social


  3 / 36 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: lil-542433
Autor: Karthikayalu, Subbrayalu; Rama, V; Kirubagaran, R; Venkatesan, R.
Título: Hemolytic toxin from the soft coral Sarcophyton trocheliophorum: isolation and physiological characterization
Fonte: J. venom. anim. toxins incl. trop. dis;16(1):107-120, 2010. ilus, graf, tab.
Idioma: en.
Resumo: The unifying characteristic of cnidarians is the production of protein and polypeptide toxins. The present study describes the identification of a hemolytic toxin from the soft coral Sarcophyton trocheliophorum. The crude extract was highly cytotoxic (EC50 = 50 ng/mL) against human erythrocytes. It was also tested for hemolytic activity by the blood agar plate method, resulting in a hemolytic halo of 12 mm with 50 µg of protein. The stability of the venom under different physiological conditions was analyzed. The venom hemolytic activity was augmented by alkaline and neutral pH whereas it was reduced in acidic pH. The activity was stable up to 60º C. The hemolytic activity was completely abolished by the addition of serum and reduced significantly during frequent freezing-thawing cycles. Toxin purification was performed by ammonium sulfate precipitation and subsequently desalted by dialysis against 10 mM sodium phosphate buffer (pH 7.2), followed by anion exchange chromatography on DEAE cellulose column and gel filtration chromatography using Sephadex G-50 matrix. The purified active fractions possessed a prominent protein of approximately 45 kDa, as revealed by SDS-PAGE.(AU)
Descritores: Cnidários/fisiologia
Venenos de Cnidários/toxicidade
Diálise
Eritrócitos
-Proteínas
Cromatografia em Gel
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


  4 / 36 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-954735
Autor: Hernández-Matehuala, Rosalina; Rojas-Molina, Alejandra; Vuelvas-Solórzano, Alma Angelica; Garcia-Arredondo, Alejandro; Ibarra Alvarado, Cesar; Olguín-López, Norma; Aguilar, Manuel.
Título: Cytolytic and systemic toxic effects induced by the aqueous extract of the fire coral Millepora alcicornis collected in the Mexican Caribbean and detection of two types of cytolisins
Fonte: J. venom. anim. toxins incl. trop. dis;21:36, 31/03/2015. tab, graf, ilus.
Idioma: en.
Projeto: Consejo Nacional de Ciencia y Tecnología; . Consejo Nacional de Ciencia y Tecnología.
Resumo: Background Millepora alcicornis is a branching hydrocoral common throughout the Caribbean Sea. Like other members of this genus, this species is capable of inducing skin eruptions and blisters with severe pain after contact. In the present study, we investigated the toxicity of theM. alcicornis aqueous extract on several animal models. Considering that some cnidarian hemolysins have been associated to local tissue damage, since they also induce lysis of other cell types, we also made a partial characterization of the hemolytic activity of M. alcicornis aqueous extract. This information is important for understanding the defense mechanisms of the "fire corals".Methods The effects of pH, temperature, and some divalent cations on the hemolytic activity of the extract were assayed, followed by a zymogram analysis to detect the cytolysins and determine their approximate molecular weight. The toxicity of the aqueous extract was assayed in mice, by intravenous administration, and histopathological changes on several tissues were analyzed by light microscopy. The toxicity of the extract was also tested inArtemia salina nauplii, and the damages caused on the crustaceans were analyzed by transmission and scanning electron microscopy.Results The hemolytic activity of the hydrocoral extract was enhanced in the presence of Ca 2+ (≥2 mM), Mg 2+ (≥6 mM), and Ba2+ (≥0.1 mM); however, it was reduced in the presence of Cu2+(≥0.1 mM), Zn 2+ (≥6 mM), and EDTA (≥0.34 mM). Differences in the pH did not affect the hemolytic activity, but it was temperature-sensitive, since preincubation at ≥ 50 °C sharply reduced hemolysis. The zymogram showed the presence of two types of hemolysins: ~ 28-30 kDa proteins with phospholipase A 2 activity and ~ 200 kDa proteins that do not elicit enzymatic activity. The aqueous extract of this cnidarian was lethal to mice (LD 50 = 17 μg protein/g), and induced kidney, liver, and lung damages. Under denaturing conditions, the aqueous extract completely lost its toxic and hemolytic activities.Conclusions The results showed that the M. alcicornis aqueous extract contains two types of thermolabile hemolysins: proteins of approximately 28-30 kDa with PLA 2 activity, while the others are larger proteins of approximately 200 kDa, which do not possess PLA 2activity. Those thermolabile cytolysins, which are stable to pH changes and whose activity is calcium dependent, are capable of inducing damage in lung, kidney and liver tissues, resulting in a slow death of mice. M. alcicorniscytolysins also provoke tissue dissociation inArtemia salina nauplii that might be attributed to pore forming mechanisms.(AU)
Descritores: Cnidários
Citotoxinas
Toxicidade
Hemólise
-Ambiente Marinho
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


  5 / 36 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-954792
Autor: García-Arredondo, Alejandro; Rojas-Molina, Alejandra; Ibarra-Alvarado, César; Lazcano-Pérez, Fernando; Arreguín-Espinosa, Roberto; Sánchez-Rodríguez, Judith.
Título: Composition and biological activities of the aqueous extracts of three scleractinian corals from the Mexican Caribbean: Pseudodiploria strigosa, Porites astreoides and Siderastrea siderea
Fonte: J. venom. anim. toxins incl. trop. dis;22:32, 2016. tab, graf, ilus.
Idioma: en.
Projeto: CONACYT-Querétaro State Government FOMIX-QRO; . PAPIIT; . Universidad Autónoma de Querétaro.
Resumo: Background: Scleractinian corals (stony corals) are the most abundant reef-forming cnidarians found in coral reefs throughout the world. Despite their abundance and ecological importance, information about the diversity of their toxins and their biological activities is very scarce. In this study, the chemical composition and the biological activities of the aqueous extracts of Pseudodiploria strigosa, Porites astreoides and Siderastrea siderea, three scleractinian corals from the Mexican Caribbean, have been assessed for the first time. Methods: Toxicity of the extracts was assessed in crickets; the presence of cytolysins was detected by the hemolysis assay; the vasoconstrictor activity was determined by the isolated rat aortic ring assay; the nociceptive activity was evaluated by the formalin test. The presence of phospholipases A2 (PLA2), serine proteases, and hyaluronidases was determined by enzymatic methods. Low-molecular-weight fractions were obtained by gel filtration chromatography and ultrafiltration. Results: Extracts from the three species were toxic to crickets, induced hemolysis in human and rat erythrocytes, produced vasoconstriction on isolated rat aortic rings, and presented phospholipase A2 and serine-protease activity. Despite the fact that these corals are not considered to be harmless to humans, the extracts generated significant nociceptive responses. The matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry analysis of the low-molecular-weight fractions revealed the presence of peptides within a mass range of 3000 to 6000 Da. These fractions were toxic to crickets and two of them induced a transitory vasoconstrictor effect on isolated rat aortic rings. Conclusion: This study suggests that scleractinian corals produce low-molecular-weight peptides that are lethal to crickets and induce vasoconstriction.(AU)
Descritores: Vasoconstrição
Cnidários/crescimento & desenvolvimento
Bancos de Espécimes Biológicos
Dor Nociceptiva
Hemólise
-Equilíbrio Ecológico
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


  6 / 36 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-1278512
Autor: Úngari, L P; Vieira, D H M D; Santos, A L Q; Silva, R J da; ODwyer, L H.
Título: Myxobolus spp. (Cnidaria: Myxobolidae) in the circulating blood of fishes from Goiás and Mato Grosso States, Brazil: case report / Myxobolus spp. (Cnidaria: Myxobolidae) no sangue circulante de peixes dos estados de Goiás e Mato Grosso, Brasil: relato de caso
Fonte: Braz. j. biol;82:e242823, 2022. tab, graf.
Idioma: en.
Projeto: Ibama; . UFU; . CNPq; . FAPESP; . FAPESP.
Resumo: Abstract Myxosporidiosis is an infectious disease caused by myxozoans of the Phylum Cnidaria, Class Myxosporea, and Order Bivalvulida, considered a common parasite in fresh and saltwater fishes that parasitize many organs, especially gills. In the present study, 49 specimens of fishes belonging to eight genera: Tetragonopterus, Leporinus, Myleus, Pirinampus, Rhapiodon, Pygocentrus, Ageneiosus, and Serrasalmus were collected and blood smears were made, fixed with absolute methanol, and stained with Giemsa 10% to survey hemoparasites. However, myxospores were found in the circulating blood of five (10.20%) fishes belonging to genus Tetragonopterus, Myleus, and Pygocentrus. Two morphological types of Myxobolus spp. were identified in all the five fish specimens analyzed. Usually, investigations on myxozoans in fish are carried out with the search for plasmodia or cysts in the fish organs and observation of the cavity of organs. Nevertheless, this study highlights the importance of also examining the blood of these animals, since these parasites can cause severe pathogenic diseases in fish. Thus, the blood analyses can proportionate preventive sanitary control for commercial fish avoiding economic loss.

Resumo A mixosporidiose é considerada uma doença infecciosa causada por mixozoários pertentences ao Filo Cnidaria, Classe Myxosporea e Ordem Bivalvulida, considerados parasitos comuns de peixes de água doce e salgada, parasitando vários órgãos, principalmente as brânquias. No presente estudo, 49 espécimes de peixes pertencentes a oito gêneros: Tetragonopterus, Leporinus, Myleus, Pirinampus, Rhapiodon, Pygocentrus, Ageneiosus and Serrasalmus foram coletados e extensões sanguíneas foram feitas com a finalidade de encontrar hemoparasitos. Entretanto, mixoesporos foram observados em cinco (10.20%) espécimes de peixes, pertencentes aos gêneros Tetragonopterus, Myleus e Pygocentrus. Dois morfotipos de Myxobolus spp. foram identificados parasitando esses peixes. Normalmente, as investigações sobre mixozoários em peixes é realizada com a procura de plasmódios ou cistos nos órgãos dos peixes e observação da cavidade de órgãos. Porém, esse trabalho ressalta a importância de se examinar também o sangue desses animais, já que esses parasitos podem ocasionar patogenias severas em peixes. Sendo assim, a análise sanguínea pode proporcionar controle sanatório preventivo para peixes comerciais e evitar perdas econômicas.
Descritores: Doenças Parasitárias em Animais
Cnidários
Myxozoa
Myxobolus
Doenças dos Peixes
-Filogenia
Brasil
Peixes
Brânquias
Limites: Humanos
Animais
Tipo de Publ: Relatos de Casos
Responsável: BR1.1 - BIREME


  7 / 36 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1278223
Autor: Genzano, Gabriel; Puente Tapia, Francisco Alejandro; Dutto, Sofía; Schiariti, Agustín.
Título: Las medusas en los balnearios de la provincia de Buenos Aires / The jellyfish species in the coastal waters of Buenos Aires province
Fonte: Acta toxicol. argent;28(2):53-59, Sept. 2020. graf.
Idioma: es.
Resumo: Resumen Las medusas son organismos mayoritariamente marinos pertenecientes al grupo de los cnidarios, los cuales se caracterizan por presentar células urticantes especializadas, los cnidocitos. Si bien, todas las medusas son potencialmente venenosas y el grado de toxicidad depende de la especie, sus efectos sobre los humanos varían desde reacciones locales leves hasta reacciones atópicas-anafilácticas graves, llegando incluso a la muerte de la víctima. Mundialmente se conocen numerosas especies de medusas causantes de envenenamiento a humanos, tales como la avispa de mar (Chironex fleckeri), el sifonóforo carabela portuguesa (Physalia physalis) o el hidrocoral de fuego (Millepora spp.). En Argentina, tres especies de medusas revisten de im portancia clínica epidemiológica debido a su poder urticante: las hidromedusas Liriope tetraphylla y Olindias sambaquiensis, así como la escifomedusa Chrysaora lactea. Estas especies presentan sus mayores abundancias en el verano en las costas bonae renses, coincidiendo con la presencia de turistas durante el periodo vacacional. Sus afectaciones varían de leves a moderadas, registrándose desde parestesias y ardor con dermatitis, prurito, edemas y eritemas. Una infinidad de "remedios caseros" se conocen para remediar los efectos de las picaduras de medusas, sin embargo, la mayoría han resultado ineficaces y perjudiciales. Lo más recomendable es evitar frotar y lavar la zona afectada con agua dulce o aplicar hielo para tratar de contrarrestar el ardor y acudir lo antes posible al centro de salud más cercano.

Abstract Medusae are mainly a marine group belonged to cnidarians, which are characterized by specialized stinging cells, cnidocyts. Although all medusae are potentially poisonous, their toxicity depends on the species and the effects on humans vary- ing from mild local reactions to severe atopic-anaphylactic reactions, even the death of the victim. Numerous species of cnidar ians are known worldwide to affect humans, such as the sea wasp {Chironex fleckeri), the siphonophore portuguese man-of-war (Physaliaphysalis) or the fire-coral (Millepora spp.). In Argentina, three species of medusae are known with clinical epidemiological importance due to their stinging power: the hydromedusae Liriopetetraphylla and Olindias sambaquiensis, as well as the scypho- medusae Chrysaora lactea. These species have their highest abundances in the summer on Buenos Aires coasts, coinciding with the presence of tourists during the summer vacations. Its affectations vary from mild to moderate, registering from paresthesias and burning with dermatitis, itching, edemas, and erythema. An infinity of "home remedies" are known formedusae stings, how- ever, most of them have proven ineffective and harmful. It is best to avoid rubbing and washing the affected area with fresh water or applying ice to try to counteract the burning in the region and to go the health center as soon as possible.
Descritores: Cnidários/patogenicidade
Venenos de Cnidários/toxicidade
-Argentina
Nematocisto/lesões
Responsável: AR658.1 - Biblioteca Central "Leopoldo Marechal"


  8 / 36 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-897045
Autor: Pereira, João Claudio Campos; Szpilman, David; Haddad Junior, Vidal.
Título: Anaphylactic reaction/angioedema associated with jellyfish sting
Fonte: Rev. Soc. Bras. Med. Trop;51(1):115-117, Jan.-Feb. 2018. graf.
Idioma: en.
Resumo: Abstract The most frequent jellyfish in Southern Brazil causes mainly local pain and skin plaques. A 3-year-old female bather presented an erythematous, irregular plaque on the left forearm after contact with a jellyfish and intense facial angioedema with facial flushing. The lungs had vesicular murmur, wheezes, and snorts, and pink and spumous secretion in the airways with intercostal retraction. She was administered subcutaneous adrenaline (0.1mg/kg) and hydrocortisone intravenous (10mg/kg) with total recovery in a few minutes. The manifestations of anaphylactic reactions are distinct from those of envenomations, and prompt and adequate care is fundamental in these situations.
Descritores: Mordeduras e Picadas/complicações
Cnidários/classificação
Venenos de Cnidários
Anafilaxia/etiologia
Angioedema/etiologia
-Anafilaxia/diagnóstico
Angioedema/diagnóstico
Limites: Humanos
Animais
Feminino
Tipo de Publ: Relatos de Casos
Responsável: BR1.1 - BIREME


  9 / 36 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Id: lil-655704
Autor: Cobar, Oscar.
Título: Elucidación estructural por RMN de una y dos dimensiones del esqueleto de Briarellina / NMR structural elucidation by one two dimensional skeleton Brialellina
Fonte: Rev. cient. (Guatem.);4(1):1-8, 2008. ilus.
Idioma: es.
Resumo: Gorgonios caribeños del género Briareum (Cnidaria, Gorgonaceae), son una fuente importante de metabolitos secundarios bioactivos. Biosintetizan tres tipos básicos de diterpenos; asbestininos, briarellinas y briareinas. Las briarellinas A R y las briarellinas D y K peróxidos, son los únicos metabolitos que poseen el esqueleto de briallerina, que han sido aislados de un organismo marino de la región del Caribe. Estos diterpenos altamente funcionalizandos forman parte de la familia de Cembranoides 2,11 ciclizados, cuyo origen biosintético se propone deriva del esqueleto carbonado del cembrano, vía diversas ciclizaciones oxidativas y transposiciones de metilo. En este trabajo se discuten ampliamente las propiedades de Resonancia Magnetica Nuclear RMN del esqueleto del carbonato de Briarellina y la comparación entre los dos tipos de briallerinas existentes, y de éstas, con el de los asbestininos...
Descritores: Cnidários
Diterpenos
Imageamento por Ressonância Magnética
Espectroscopia de Ressonância Magnética
Prótons
Responsável: GT5.3 - CEDOBF - Centro de Documentación y Biblioteca de Farmacia


  10 / 36 LILACS  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: lil-539756
Autor: Figueroa, D; de los Ríos, P.
Título: First report of Craspedacusta sowerbii (Cnidaria) (Lankester, 1880) for Patagonian waters (38° S, Chile): a possible presence of invasive species and its potential ecological implications
Fonte: Braz. j. biol;70(1):227-228, Feb. 2010.
Idioma: en.
Descritores: Cnidários
Ecossistema
-Chile
Cnidários/classificação
Água Doce
Limites: Animais
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME



página 1 de 4 ir para página            
   


Refinar a pesquisa
  Base de dados : Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde
WXIS|fatal error|unavoidable|recxref/read|