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1.
Braz. j. biol ; 80(1): 57-65, Feb. 2020. graf
Article in English | LILACS | ID: biblio-1089300

ABSTRACT

Abstract Selaginella convoluta (Arn.) Spring is a species popularly known as "jericó", and used in folk medicine as analgesic and anti-inflammatory. This study aimed to investigate in mice the antinociceptive and anti-inflammatory activities of the hexane (Sc-Hex) and chloroform (Sc-CHCl3) fractions (100, 200 and 400 mg/kg) obtained by partition of crude ethanol extract from S. convoluta. The preliminary phytochemical analysis of the fractions was performed. Antinociceptive activity was evaluated by writhing, formalin and hot-plate tests. Anti-inflammatory activity was evaluated using carrageenan-induced pleurisy. The rota-rod test was used to evaluate motor coordination. Preliminary phytochemical screening showed that the Sc-Hex and the Sc-CHCl3 were positive for the presence of flavonoids, anthracene derivatives, quinones, triterpenes and steroids. Inhibition of writhing was observed for fractions tested. The Sc-Hex at all doses tested was effective in reducing the nociceptive behavior produced by formalin only in the second phase. However, the Sc-CHCl3 decreased the paw licking time in the first and second phases. In the hot plate no significant effect was observed for any fraction. In the rota-rod test, treated mice did not demonstrate any significant motor performance changes. In the carrageenan-induced pleurisy, Sc-CHCl3 (200 mg/kg) reduced cell migration to the pleural cavity. These results reveal the antinociceptive properties of S. convoluta , which support, in part, its traditional use, since the fractions did not presented significant activity in the inflammatory response profile. We further verify that this antinociceptive effect could be by activation of nociceptive peripheral pathway.


Resumo Selaginella convoluta é uma espécie popularmente conhecida como "jericó", e usada na medicina popular como analgésica e anti-inflamatória. Este estudo teve como objetivo investigar em camundongos as atividades antinociceptiva e anti-inflamatória das frações hexânica (Sc-Hex) e clorofórmica (Sc-CHCl3) (100, 200 e 400 mg/kg) obtidas por partição do extrato etanólico bruto de S. convoluta . A análise fitoquímica preliminar das frações foi realizada. A atividade antinociceptiva foi avaliada pelos testes de contorções abdominais, formalina e placa quente. A atividade anti-inflamatória foi avaliada usando pleurisia induzida por carragenina. O teste do rota-rod foi utilizado para avaliar a coordenação motora. A triagem fitoquímica preliminar mostrou que Sc-Hex e Sc-CHCl3 apresentaram reação positiva para a presença de flavonoides, derivados antracênicos, quinonas, triterpenos e esteroides. A inibição das contorções foi observada para as frações testadas. Sc-Hex em todas as doses testadas foi efetivo na redução do comportamento nociceptivo produzido pela formalina somente na segunda fase. No entanto, Sc-CHCl3 diminuiu o tempo de lambida da pata na primeira e segunda fases. Na placa quente, nenhum efeito significativo foi observado para qualquer fração. No teste do rota-rod os camundongos tratados não demonstraram mudanças significativas na coordenação motora. Na pleurisia induzida por carragenina, Sc-CHCl3 (200 mg/kg) reduziu a migração celular para a cavidade pleural. Estes resultados revelam a propriedade antinociceptiva de S. convoluta, justificando, em parte, seu uso tradicional, uma vez que os extratos não apresentaram atividade significativa no perfil de resposta inflamatória. Verificamos ainda que esse efeito antinociceptivo mostrou-se ligado à ativação da via periférica nociceptiva.


Subject(s)
Animals , Rats , Selaginellaceae , Pain , Plant Extracts , Carrageenan , Analgesics , Anti-Inflammatory Agents
2.
Braz. j. biol ; 78(2): 248-254, May-Aug. 2018. tab, graf
Article in English | LILACS | ID: biblio-888871

ABSTRACT

Abstract This study was carried out to assess the antibacterial, cytotoxic and antioxidant activities of extracts of Morus nigra L. HPLC was used to determine the fingerprint chromatogram of the crude ethanolic extract (Mn-EtOH). The antibacterial effect was assessed through the method of microdilution. The cytotoxicity was tested against human tumour cell lines using the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay. The total phenolic and flavonoid contents were also assessed through the Folin-Ciocalteu and aluminum chloride methods, respectively. Antioxidant activities of the extracts were evaluated by using 2,2-diphenyl-1-picrylhydrazil (DPPH) radical scavenging and β-carotene-linoleic acid bleaching methods. The presence of phenolic compounds in Mn-EtOH was confirmed using HPLC. The extracts showed activity against most microorganisms tested. The extracts did not show any expressive antiproliferative effect in the assessment of cytotoxicity. The most significant total phenolic content was 153.00 ± 11.34 mg of gallic acid equivalent/g to the ethyl acetate extract (AcOEt). The total flavonoid content was 292.50 ± 70.34 mg of catechin equivalent/g to the AcOEt extract, which presented the best antioxidant activity (IC50 50.40 ± 1.16 μg/mL) for DPPH scavenging. We can conclude that this species shows strong antibacterial and antioxidant activities, as well as weak cytotoxic effects.


Resumo Este estudo foi realizado para avaliar as atividades antibacteriana, citotóxica e antioxidante de extratos de Morus nigra L. HPLC foi utilizado para determinar o perfil de compostos fenólicos do extrato etanólico bruto (Mn-EtOH). O efeito antibacteriano foi avaliado através do método de microdiluição. A citotoxicidade foi testada contra linhagens celulares de tumores humanos utilizando o ensaio do brometo de 3-(4,5-dimetil-2-tiazolil)-2,5-difenil-2H-tetrazólio (MTT). O conteúdo total de compostos fenólicos e flavonoides também foi avaliado por meio dos métodos de Folin-Ciocalteu e cloreto de alumínio, respectivamente. A atividade antioxidante dos extratos foi avaliada por meio do sequestro do radical livre 2,2-difenil-1-picrilhidrazil (DPPH) e co-oxidação do sistema β-caroteno-ácido linoleico. A presença de compostos fenólicos em Mn-EtOH foi confirmada utilizando HPLC. Os extratos mostraram atividade contra a maioria dos microrganismos testados. Os extratos não mostraram qualquer efeito antiproliferativo expressivo na avaliação da citotoxicidade. O conteúdo fenólico total mais significativo foi de 153,00 ± 11,34 mg de equivalente de ácido gálico/g para o extrato acetato de etila (AcOEt). O conteúdo de flavonoides totais foi de 292,50 ± 70,34 mg de equivalente de catequina/g para o extrato AcOEt, que apresentou a melhor atividade antioxidante (IC50 50,40 ± 1,16 mg/mL) para o sequestro do DPPH. Podemos concluir que esta espécie apresenta forte atividade antibacteriana e antioxidante, bem como fraca atividade citotóxica.


Subject(s)
Humans , Plant Extracts/pharmacology , Morus/chemistry , Anti-Bacterial Agents/pharmacology , Antioxidants/pharmacology , Phenols/analysis , Picrates/metabolism , Flavonoids/analysis , Biphenyl Compounds/metabolism , Plant Extracts/toxicity , Plant Extracts/chemistry , Cell Survival/drug effects , Cell Line, Tumor , Anti-Bacterial Agents/toxicity , Anti-Bacterial Agents/chemistry , Antioxidants/toxicity , Antioxidants/chemistry
3.
Article in English | LILACS-Express | LILACS, VETINDEX | ID: biblio-1467258

ABSTRACT

Abstract Selaginella convoluta (Arn.) Spring is a species popularly known as jericó, and used in folk medicine as analgesic and anti-inflammatory. This study aimed to investigate in mice the antinociceptive and anti-inflammatory activities of the hexane (Sc-Hex) and chloroform (Sc-CHCl3) fractions (100, 200 and 400 mg/kg) obtained by partition of crude ethanol extract from S. convoluta. The preliminary phytochemical analysis of the fractions was performed. Antinociceptive activity was evaluated by writhing, formalin and hot-plate tests. Anti-inflammatory activity was evaluated using carrageenan-induced pleurisy. The rota-rod test was used to evaluate motor coordination. Preliminary phytochemical screening showed that the Sc-Hex and the Sc-CHCl3 were positive for the presence of flavonoids, anthracene derivatives, quinones, triterpenes and steroids. Inhibition of writhing was observed for fractions tested. The Sc-Hex at all doses tested was effective in reducing the nociceptive behavior produced by formalin only in the second phase. However, the Sc-CHCl3 decreased the paw licking time in the first and second phases. In the hot plate no significant effect was observed for any fraction. In the rota-rod test, treated mice did not demonstrate any significant motor performance changes. In the carrageenan-induced pleurisy, Sc-CHCl3 (200 mg/kg) reduced cell migration to the pleural cavity. These results reveal the antinociceptive properties of S. convoluta , which support, in part, its traditional use, since the fractions did not presented significant activity in the inflammatory response profile. We further verify that this antinociceptive effect could be by activation of nociceptive peripheral pathway.


Resumo Selaginella convoluta é uma espécie popularmente conhecida como jericó, e usada na medicina popular como analgésica e anti-inflamatória. Este estudo teve como objetivo investigar em camundongos as atividades antinociceptiva e anti-inflamatória das frações hexânica (Sc-Hex) e clorofórmica (Sc-CHCl3) (100, 200 e 400 mg/kg) obtidas por partição do extrato etanólico bruto de S. convoluta . A análise fitoquímica preliminar das frações foi realizada. A atividade antinociceptiva foi avaliada pelos testes de contorções abdominais, formalina e placa quente. A atividade anti-inflamatória foi avaliada usando pleurisia induzida por carragenina. O teste do rota-rod foi utilizado para avaliar a coordenação motora. A triagem fitoquímica preliminar mostrou que Sc-Hex e Sc-CHCl3 apresentaram reação positiva para a presença de flavonoides, derivados antracênicos, quinonas, triterpenos e esteroides. A inibição das contorções foi observada para as frações testadas. Sc-Hex em todas as doses testadas foi efetivo na redução do comportamento nociceptivo produzido pela formalina somente na segunda fase. No entanto, Sc-CHCl3 diminuiu o tempo de lambida da pata na primeira e segunda fases. Na placa quente, nenhum efeito significativo foi observado para qualquer fração. No teste do rota-rod os camundongos tratados não demonstraram mudanças significativas na coordenação motora. Na pleurisia induzida por carragenina, Sc-CHCl3 (200 mg/kg) reduziu a migração celular para a cavidade pleural. Estes resultados revelam a propriedade antinociceptiva de S. convoluta, justificando, em parte, seu uso tradicional, uma vez que os extratos não apresentaram atividade significativa no perfil de resposta inflamatória. Verificamos ainda que esse efeito antinociceptivo mostrou-se ligado à ativação da via periférica nociceptiva.

4.
Arq. bras. med. vet. zootec ; 66(5): 1495-1503, Sep-Oct/2014. tab, graf
Article in English | LILACS | ID: lil-729761

ABSTRACT

Five Holstein cows were distributed in a 5x5 latin square design to assess the effect of replacement levels of dry ground corn grain (DGCG) by high moisture corn silage (HMCS) on intake, total nutrient digestibility and plasma glucose, according to the following treatments: 1) 100% DGCG; 2) 75% DGCG and 25% HMCS; 3) 50% DGCG and 50% HMCS; 4) 25% DGCG and 75% HMCS; 5) 100% HMCS. The experiment lasted 70 days, divided into five phases of 14 days each. The digestibility was obtained using chromic oxide (Cr2O3) as the indicator. Fecal samples were collected twice daily and blood samples were collected on the last day of each period before the first meal (0h) and 2h, 4h, 6h and 12h after the meal. There was no effect (P>0.05) on the intake of dry matter (DM), neutral detergent fiber (NDF), acid detergent fiber (ADF) and starch. The total apparent digestibility of DM, crude protein (CP), NDF and ADF were not affected (P>0.05) by the treatments, as well as the plasma glucose concentration. However, there was a decreased linear effect (P<0.05) for the protein intake and increased linear effect (P<0.05) for starch digestibility, as the level of HMCS was increased in the diets...


Cinco vacas da raça Holandesa foram distribuídas em quadrado latino 5x5 com o objetivo de se avaliar o efeito de níveis de substituição do grão seco de milho (GSM) pela silagem de grãos úmidos de milho (SGUM) sobre consumo, digestibilidade total dos nutrientes e glicose plasmática, o que constituiu os tratamentos: 1) 100% GSM; 2) 75% GSM e 25% SGUM; 3) 50% GSM e 50% SGUM; 4) 25% GSM e 75% SGUM; 5) 100% SGUM. O período experimental durou 70 dias, divididos em cinco fases de 14 dias. A digestibilidade foi obtida utilizando-se óxido crômico (Cr2O3) como indicador. Foram colhidas amostras fecais duas vezes por dia, bem como amostras de sangue no último dia dos períodos, antes da primeira refeição (zero hora), duas, quatro, seis e 12 horas após a refeição. Não houve efeito (P>0,05) sobre o consumo de matéria seca (MS), fibra em detergente neutro (FDN), fibra em detergente ácido (FDA) e amido. A digestibilidade aparente total da MS, a proteína bruta (PB), a FDN e a FDA não foram afetadas (P>0,05), assim como a concentração de glicose plasmática. Houve efeito linear decrescente (P<0,05) para consumo de PB e linear crescente (P<0,05) para digestibilidade do amido, à medida que se aumentou a inclusão de SGUM...


Subject(s)
Animals , Cattle , Edible Grain , Nutritive Value , Starch and Fecula , Silage/analysis , Animal Nutrition Sciences , Digestion , Diet/veterinary , Glucose , Oxides
5.
Braz. j. med. biol. res ; 45(9): 827-833, Sept. 2012. ilus, tab
Article in English | LILACS | ID: lil-646327

ABSTRACT

Acute kidney injury (AKI) is common in critically ill patients. Diuretics are used without any evidence demonstrating a beneficial effect on renal function. The objective of the present study is to determine the incidence of AKI in an intensive care unit (ICU) and if there is an association between the use of furosemide and the development of AKI. The study involved a hospital cohort in which 344 patients were consecutively enrolled from January 2010 to January 2011. A total of 132 patients (75 females and 57 males, average age 64 years) remained for analysis. Most exclusions were related to ICU discharge in the first 24 h. Laboratory, sociodemographic and clinical data were collected until the development of AKI, medical discharge or patient death. The incidence of AKI was 55% (95%CI = 46-64). The predictors of AKI found by univariate analysis were septic shock: OR = 3.12, 95%CI = 1.36-7.14; use of furosemide: OR = 3.27, 95%CI = 1.57-6.80, and age: OR = 1.02 (95%CI = 1.00-1.04). Analysis of the subgroup of patients with septic shock showed that the odds ratio of furosemide was 5.5 (95%CI = 1.16-26.02) for development of AKI. Age, use of furosemide, and septic shock were predictors of AKI in critically ill patients. Use of furosemide in the subgroup of patients with sepsis/septic shock increased (68.4%) the chance of development of AKI when compared to the sample as a whole (43.9%).


Subject(s)
Aged , Female , Humans , Male , Middle Aged , Acute Kidney Injury/chemically induced , Diuretics/adverse effects , Furosemide/adverse effects , Shock, Septic/complications , Acute Kidney Injury/complications , Critical Illness , Intensive Care Units , Length of Stay , Prognosis , Risk Factors
6.
Rev. bras. plantas med ; 14(3): 548-555, 2012. ilus, tab
Article in Portuguese | LILACS | ID: lil-658137

ABSTRACT

Plantas medicinais são utilizadas mundialmente como uma das principais formas de cuidado primário de saúde. No entanto, a literatura indica que muitas espécies podem apresentar composição química variável, toxicidade ou difícil identificação. O objetivo do presente estudo foi obter critérios úteis para o controle de qualidade farmacognóstico das principais espécies vegetais de uso popular no estado do Rio Grande do Norte, utilizando metodologias de análise botânica (morfodiagnose macro e microscópica) e química (triagem fitoquímica e cromatografia em camada delgada), evitando assim adulterações ou uso inadequado dessas plantas medicinais no estado. No total, sete espécies foram analisadas Acmella oleracea, Chenopodium ambrosioides, Lippia alba, Mentha piperita, Ocimum gratissimum, Peumus boldus e Rosmarinus officinalis. Diversos marcadores botânicos e fitoquímicos foram identificados, contribuindo dessa forma para a correta identificação destas espécies de plantas medicinais importantes no estado do Rio Grande do Norte.


Medicinal plants are worldwide used as one of the main forms of primary healthcare. However, the literature indicates that many species may have variable chemical composition, toxicity, or even difficult identification. The aim of this study was to obtain useful criteria for pharmacognostic quality control of the main plant species of popular use in the state of Rio Grande do Norte, using methods of botanical (macro and microscopic morphodiagnosis) and chemical (phytochemical screening and thin-layer chromatography) analysis, thus preventing adulteration or inappropriate use of these medicinal plants in the state. In total, seven species were analyzed Acmella oleracea, Chenopodium ambrosioides, Lippia alba, Mentha piperita, Ocimum gratissimum, Peumus boldus and Rosmarinus officinalis. Several botanical and phytochemical markers were identified, thereby contributing to the correct identification of these important medicinal plant species in the state of Rio Grande do Norte.


Subject(s)
Plants, Medicinal/metabolism , Quality Control , Botany/methods , /methods , Chromatography, Thin Layer/methods
7.
Braz. j. microbiol ; 41(1): 59-65, Jan.-Mar. 2010. ilus, tab
Article in English | LILACS | ID: lil-531735

ABSTRACT

Food handlers, an important factor in food quality, may contain bacteria that are able to cause foodborne disease. The present study aimed to research coagulase-negative (CNS) and -positive staphylococci (CPS) in 82 food handlers, analyzing nasal and hand swabs, with identification of 62 CNS (75.6 percent) and 20 CPS strains (24.4 percent). Staphylococcal enterotoxins genes were investigated by PCR. In 20 CPS strains, 19 were positive for one or more genes. The percentage of CNS presenting genes for enterotoxins was high (46.8 percent). Despite of the staphylococcal species, the most common gene was sea (35.4 percent), followed by seh and sej (29.2 percent). The detection of new staphylococcal enterotoxins (SEs) genes showed a higher pathogenic potential in this genus. The presence of these gene points out the importance of CNS not only as contaminant bacteria but also as a pathogen.


Subject(s)
Coagulase/analysis , Coagulase/isolation & purification , Enterotoxins/genetics , Enterotoxins/isolation & purification , Food Handling , Nasal Cavity , Polymerase Chain Reaction , Food Samples , Methods , Methods
8.
J. venom. anim. toxins incl. trop. dis ; 16(3): 431-441, 2010. graf
Article in English | LILACS, VETINDEX | ID: biblio-1484506

ABSTRACT

The hydroalcoholic extract of Casearia gossypiosperma Briquet (Flacourtiaceae) was standardized for the first time through quality control procedures including pharmacognostic methods, fingerprint chromatograms, defined amounts of marker substances and physicochemical characteristics. The pharmacological activity of C. gossypiosperma (Cg) hydroalcoholic extract was assayed by a traditional in vitro test, which involved irreversible neuromuscular blockade induced by Bothrops jararacussu (Bjssu) venom (60 ìg/mL) in mouse phrenic nerve-diaphragm preparations. Bjssu venom blocked muscle activity for 26 (± 2.0) minutes (n = 6). Cg extract (0.1 mg/mL) induced changes on the baseline muscle activity without impairing the muscle function and inhibited 87.6% (± 1.8) (n = 6) of the Bjssu venom-induced blockade. Both flavonoids (0.624 g%) and polyphenols (4.63 g%) from the extract were spectrophotometrically quantified. Therefore, the present study confirms the antibothropic activity of Cg extract, supporting the ethnomedical use of Casearia sp. in the treatment of snakebite victims.


Subject(s)
Animals , Bothrops/classification , Casearia/toxicity , Poisons/analysis , Neuromuscular Blockade/methods , Hydroalcoholic Solution , Emergency Treatment
9.
J. venom. anim. toxins incl. trop. dis ; 16(3): 432-441, 2010. ilus, graf
Article in English | LILACS | ID: lil-557171

ABSTRACT

The hydroalcoholic extract of Casearia gossypiosperma Briquet (Flacourtiaceae) was standardized for the first time through quality control procedures including pharmacognostic methods, fingerprint chromatograms, defined amounts of marker substances and physicochemical characteristics. The pharmacological activity of C. gossypiosperma (Cg) hydroalcoholic extract was assayed by a traditional in vitro test, which involved irreversible neuromuscular blockade induced by Bothrops jararacussu (Bjssu) venom (60 µg/mL) in mouse phrenic nerve-diaphragm preparations. Bjssu venom blocked muscle activity for 26 (± 2.0) minutes (n = 6). Cg extract (0.1 mg/mL) induced changes on the baseline muscle activity without impairing the muscle function and inhibited 87.6 percent (± 1.8) (n = 6) of the Bjssu venom-induced blockade. Both flavonoids (0.624 g percent) and polyphenols (4.63 g percent) from the extract were spectrophotometrically quantified. Therefore, the present study confirms the antibothropic activity of Cg extract, supporting the ethnomedical use of Casearia sp. in the treatment of snakebite victims.


Subject(s)
Animals , Female , Rats , Bothrops , Casearia , Crotalid Venoms , Plant Extracts/therapeutic use , Neuromuscular Blockade
10.
J. venom. anim. toxins incl. trop. dis ; 11(4): 465-478, out.-dez. 2005. graf
Article in English | LILACS | ID: lil-417720

ABSTRACT

Numerous plants are used as snakebite antidotes in Brazilian folk medicine, including Casearia sylvestris Swartz, popularly known as guaçatonga. In this study, we examined the action of a hydroalcoholic extract from C. sylvestris on the neuromuscular blockade caused by bothropstoxin-I (BthTX-I), a myotoxin from Bothrops jararacussu venom, in mouse isolated phrenic nerve-diaphragm (PND) preparations. Aqueous (8 and 12 mg/ml, n=4 and 5, respectively) and hydroalcoholic (12 mg/ml, n=12) extracts of the leaves of C. sylvestris caused facilitation in PND preparations followed by partial neuromuscular blockade. BthTX-I (20 mg/ml, n=4) caused 50% paralysis after 65±15 min (mean ± S.E.M). Preincubation (30 min at 37°C) of BthTX-I (20 mg/ml, n=4) with a concentration of the hydroalcoholic extract (4 mg/ml) that had no neuromuscular activity, such as the control (n=5), prevented the neuromuscular blockade caused by the toxin. This protection may be mediated by compounds such as flavonoids and phenols identified by thin-layer chromatography and colorimetric assays


Subject(s)
Animals , Male , Mice , Plant Extracts/therapeutic use , Plants, Medicinal , Snake Bites , Snake Venoms , Neuromuscular Blockade
11.
J. venom. anim. toxins incl. trop. dis ; 9(1): 105-110, 2003. ilus
Article in English | LILACS | ID: lil-329535

ABSTRACT

We describe a case of trichomoniasis in a Bothrops jararaca (Serpentes, Viperidae) donated to the Center for the Study of Venoms and Venomous Animals - CEVAP/UNESP. The animal had diarrhea with great quantity of flagellated protozoa in the feces. Microscopic examination of fecal smears stained with Giemsa revealed the presence of trichomonads, morphologically similar to Trichomonas acosta. Trichomonas were not detected in fecal exams after treatment with a single dose of 40 mg/kg metronidazole (Flagyl).


Subject(s)
Animals , Bothrops , Metronidazole , Trichomonas Infections
12.
Arq. bras. med. vet. zootec ; 54(1): 84-92, fev. 2002. ilus
Article in Portuguese | LILACS | ID: lil-324261

ABSTRACT

Com o objetivo de estudar alguns fatores que influenciam a seleçäo em longo prazo, foram utilizados dados simulados pelo programa GENESYS, considerando: duas herdabilidades, dois tamanhos de populaçäo, três níveis de repetiçäo e 20 geraçöes, para acasalamento ao acaso, seleçäo individual e BLUP. Para os dois tamanhos de populaçäo estudados e herdabilidade baixa (h2 = 0,10), a seleçäo pelo BLUP apresentou maior resposta à seleçäo. A resposta pela seleçäo individual em populaçöes maiores foi similar à do BLUP em populaçöes menores. Observou-se que a oscilaçäo genética foi maior para as populaçöes submetidas à seleçäo pelo BLUP. Isso foi mais evidente para as populaçöes de menor tamanho e característica de baixa herdabilidade, devido à maior taxa de endogamia e percentagem de alelos desfavoráveis fixados


Subject(s)
Animals , Male , Female , Genetics , Inbreeding , Selection, Genetic
13.
Mem. Inst. Oswaldo Cruz ; 94(4): 543-7, July-Aug. 1999. tab
Article in English | LILACS | ID: lil-241571

ABSTRACT

The purpose of this study was to analyze the prevalence and risk factors for drug resistance among hospitalized patients in two tertiary care centers, an acquired immunodeficiency syndrome (AIDS) reference center and a sanatorium, in Rio de Janeiro, Brazil. From 1993-1994, 389 patients were diagnosed as having tuberculosis (TB). Isolates from 265 patients were tested for in vitro susceptibility to rifampin and isoniazid. Resistance to one or more drugs was detected in 44 patients (16.6 percent) and was significantly more common among recurrent cases in both hospitals (p=0.03 in the AIDS center and p=0.001 in the sanatorium). Twenty seven patients (10.2 percent) had isolates resistant to both isoniazid and rifampin. Multi-drug resistance was associated with human immunodeficiency virus (HIV) infection among patients who had never been treated for TB. In conclusion, drug-resistant TB is high in hospitalized patients in Rio de Janeiro, especially among HIV infected patients. Therefore, measures to control TB and prevent nosocomial transmission need urgently to be set up in the Brazilian hospitals


Subject(s)
Adult , Female , Humans , Adolescent , Antitubercular Agents/pharmacology , Drug Resistance , Hospitalization , Tuberculosis, Pulmonary/drug therapy , AIDS-Related Opportunistic Infections/complications , Brazil , Disease Susceptibility , Hospitals, Psychiatric , Isoniazid/pharmacology , Prevalence , Rifampin/pharmacology , Risk Factors
14.
Arq. biol. tecnol ; 39(3): 677-83, set.1996. graf
Article in Portuguese | LILACS | ID: lil-238878

ABSTRACT

Allelopathy is defined as any direct or indirect harmful effect of one plant (including microorganisms) on another through the production of chemical compounds that escape into the environment. The allelochemicals produced by microorganisms or higher plants include p-coumaric and ferulic acids: these phenolic compounds were found in soils at concentration between 0,01 mM and 0,1mM. Soybean urease (E.C.3.5.1.5) catalyzes the hydrolysis of urea, thus producing carbon dioxide and ammonia which are important for plant growth. This article analyzes a probable relation between allelopathic agents and enzymatic activity of urease. The results show that p-coumaric acids is an inhibitor of urease at high concentrations (10mM), while ferulic acid inhibits the enzyme at extremely low concentrations (10-7mM)


Subject(s)
Soybeans , Urease
15.
Arq. bras. med. vet. zootec ; 46(5): 477-84, out. 1994. tab
Article in Portuguese | LILACS | ID: lil-240079

ABSTRACT

Em pesquisa de Trichostrongylus axei em equídeos, foram examinados os estômagos de 37 equinos, 18 asininos e 22 muares procedentes dos estados do Maranhäo, Piauí, Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Minas Gerais e Goiás, registrando-se as prevalências de 75,8, 94,4 e 95,4 por cento, respectivamente para equinos, asininos e muares, com as intensidades médias de 353, 1078 e 737 e as relaçöes macho/fêmea de T. axei de 1:2,50, 1:1,79 e 1:2,37 nos mesmos hospedeiros


Subject(s)
Animals , Equidae/parasitology , Trichostrongylus
16.
Rev. saúde pública ; 18(2): 108-21, abr. 1984.
Article in Portuguese | LILACS | ID: lil-20194

ABSTRACT

Estudo realizado para determinar e analisar os anos potenciais de vida perdidos (APVP) das principais causas de obitos, segundo sexo e idade, em Fortaleza, em 1978-80. Os obitos foram distribuidos segundo causa, sexo e idade. A tecnica adotada para os APVP foi a sugerida por Romeder e McWhinnie, tendo sido definida a idade limite de vida potencial em 65 anos.Os resultados mostraram que o total de APVP foi de 197.942,5 nos homens, e 137.545, nas mulheres, correspondendo a taxas de APVP de 119,82 por 1.000 homens e 73,06 por 1.000 mulheres, e que as violencias, com 41,15 por 1.000 homens e 8,46 por 1.000 mulheres, foram as maiores responsaveis pelos APVP, nos dois sexos, arcando com 34,35% dos APVP no masculino e 11,57% no feminino. Em ordem de importancia em APVP, as principais causas foram as violencias, as doencas infecciosas intestinais, as outras doencas do aparelho respiratorio, as doencas do aparelho digestivo e o cancer, nos homens, e as violencias, as doencas do aparelho respiratorio, o cancer, as doencas infecciosas intestinais e as doencas cerebrovasculares, nas mulheres. Foi ressaltada a importancia da utilizacao da metodologia dos APVP para o planejamento em saude, como instrumento de orientacao a hierarquizacao de prioridades


Subject(s)
Infant , Child, Preschool , Child , Adolescent , Adult , Humans , Male , Female , Mortality , Actuarial Analysis , Health Status Indicators , Brazil
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