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1.
Rev Assoc Med Bras (1992) ; 65(11): 1391-1396, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31800902

RESUMO

BACKGROUND: Cardiac resynchronization therapy (CRT) is a therapeutic modality for patients with heart failure (HF). The effectiveness of this treatment for event reduction is based on clinical trials where the population of patients with Chagas' disease (DC) is underrepresented. OBJECTIVE: To evaluate the prognosis after CRT of a population in which CD is an endemic cause of HF. METHODS: A retrospective cohort conducted between January 2015 and December 2016 that included patients with HF and left ventricular ejection fraction (LVEF) of less than 35% and undergoing CRT. Clinical and demographic data were collected to search for predictors for the combined outcome of death or hospitalization for HF at one year after CRT implantation. RESULTS: Fifty-four patients were evaluated, and 13 (24.1%) presented CD as the etiology of HF. The mean LVEF was 26.2± 6.1%, and 36 (66.7%) patients presented functional class III or IV HF. After the mean follow-up of 15 (±6,9) months, 17 (32.1%) patients presented the combined outcome. In the univariate analysis, CD was associated with the combined event when compared to other etiologies of HF, 8 (47%) vs. 9 (13,5%), RR: 3,91 CI: 1,46-10,45, p=0,007, as well as lower values of LVEF. In the multivariate analysis, CD and LVEF remained independent risk factors for the combined outcome. CONCLUSION: In a population of HF patients undergoing CRT, CD was independently associated with mortality and hospitalization for HF.

2.
Parasitol Res ; 118(11): 3185-3189, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31473856

RESUMO

A total of 482 bats representing 32 species and two families were captured in the Amazon forests of the Amapá state in northern Brazil. Nineteen Artibeus planirostris bats (3.9 %) were infested with 160 ticks, all identified as Ornithodoros hasei. Three pools of larvae were screened for rickettsial DNA via polymerase chain reaction (PCR) targeting three rickettsial genes: gltA, ompA and htrA. Only one of them yielded an amplicons of the expected size for all three molecular assays. Comparisons of the obtained sequences including a phylogenetic analysis confirmed the occurrence of "Candidatus Rickettsia wissemanii" in Brazil.


Assuntos
Quirópteros/microbiologia , Quirópteros/parasitologia , Ornithodoros/microbiologia , Infecções por Rickettsia/epidemiologia , Rickettsia/isolamento & purificação , Animais , Proteínas da Membrana Bacteriana Externa/genética , Brasil/epidemiologia , DNA Bacteriano/genética , Proteínas de Choque Térmico/genética , Ixodidae/microbiologia , Larva/microbiologia , Proteínas Periplásmicas/genética , Filogenia , Reação em Cadeia da Polimerase , Rickettsia/genética , Serina Endopeptidases/genética
3.
Appl Opt ; 57(15): 4228-4231, 2018 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-29791398

RESUMO

A photonic crystal fiber Mach-Zehnder interferometer design was optimized to obtain high performance and ultralow chirp. Two long-period gratings were used to excite the cladding modes, and the rich structure of the cladding was tailored to obtain a slightly chirped free spectral range, as required by the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T) Norm G.694.1. Finally, a fabrication tolerance analysis was performed. The advantages of the proposed device are an ultralow chirp, high bandwidth, and fabrication robustness tolerance.

4.
Biota Neotrop. (Online, Ed. ingl.) ; 18(2): e20170496, 2018. tab, graf
Artigo em Inglês | LILACS-Express | ID: biblio-951161

RESUMO

Abstract: In recent years there has been an increase in research interest in remnants of Atlantic Forest above 500 m a.s.l., such as in the Serra da Mantiqueira, which is considered a priority area for conservation. The chiropterofauna of the Serra da Mantiqueira remains relatively under-studied, and here we present a list of bat species from the "Reserva Particular do Patrimônio Natural (RPPN) Cachoeira do Tombo", a private conservation unit located in an area of montane Atlantic Forest in the Serra da Mantiqueira. Bats were captured with mist nets along trails and near a diurnal roost. A total of 498 individuals of 19 bat species belonging to the families Phyllostomidae, Vespertilionidae and Molossidae were captured. Phyllostomidae were captured only along the trails, Molossidae were captured only in the diurnal roost and Vespertilionidae were captured in both. The species accumulation curves did not show stabilizing trends. However, 80% of the expected richness was sampled and the species richness of bats found is similar to other studies previously carried out in the region. In contrast to other inventories carried out in the Atlantic Forest, Desmodus rotundus was the species most frequently captured along the trails. A large number of individuals of Molossus aztecus sheltering in man-made structures were caught, constituting an unusual event. Additionally, here we report cohabitation of this species with Molossus molossus for the first time. Our results show that this area, which appears on the map of environmental conflicts for the state of Minas Gerais, has a rich chiropterofauna and also further corroborate the importance of using mist-nets at roosts to increase the probability of capturing the richness and abundance of insectivorous bats present in the area.


Resumo: Nos últimos anos houve um aumento no interesse em pesquisas em remanescentes de Floresta Atlântica acima de 500 m de altitude, como na Serra da Mantiqueira, a qual é considerada área prioritária para a conservação. A fauna de quirópteros na Serra da Mantiqueira ainda permanece relativamente pouco estudada, e aqui nós apresentamos uma lista de espécies de morcegos da Reserva Particular do Patrimônio Natural (RPPN) Cachoeira do Tombo, uma unidade de conservação privada localizada em área de Floresta Atlântica Montana na Serra da Mantiqueira. Os morcegos foram capturados com redes de neblina ao longo de trilhas e junto de um abrigo diurno. Um total de 498 indivíduos de 19 espécies de morcegos pertencentes às famílias Phyllostomidae, Vespertilionidae e Molossidae foram capturados. Phyllostomidae foram capturados somente em trilhas, Molossidae no abrigo diurno e Vespertilionidae em ambos. As curvas de acumulação de espécies não mostraram tendência de estabilização. No entanto, 80% da riqueza esperada foi amostrada e a riqueza de espécies encontrada foi similar a outros estudos previamente conduzidos na região. Diferente de outros inventários realizados na Mata Atlântica, Desmodus rotundus foi a espécie mais frequentemente capturada ao longo das trilhas. Um grande número de indivíduos de Molossus aztecus foi encontrado se abrigando em abrigo artificial, o que constitui um evento pouco usual. Adicionalmente, a coabitação dessa espécie com Molossus molossus é reportada aqui pela primeira vez. Os resultados mostram que essa área, que está inserida no mapa de conflitos ambientais do estado de Minas Gerais, possui uma rica chiropterofauna e corrobora a importância de usar redes de neblina em abrigos para aumentar a probabilidade de capturar a riqueza e abundância de morcegos insetívoros presentes na área.

5.
6.
Otol Neurotol ; 37(3): 281-3, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26808553

RESUMO

OBJECTIVE: The objective of this study was to evaluate patients with vestibular migraine and analyze whether different vestibular symptoms were able to discriminate different subgroups. PATIENTS: Eighty-three patients (73 women, mean age 42 yr) who fulfilled the criteria for vestibular migraine were selected. INTERVENTION: Participants were divided into two groups according to their vestibular symptoms: spontaneous vertigo (SV) or triggered vertigo (TV). In each group, migraine subtype (migraine with aura and migraine without aura) was further analyzed. RESULTS: The SV group comprised 40 patients (35 women, mean age 42.6 yr) of which 26 had migraine with aura. The TV group comprised 43 patients (38 women, mean age 41.3 yr) of which 34 had migraine without aura. A significant difference in the presence of spontaneous vertigo was noted, proving more frequent in the migraine with aura group, whereas TV was more frequent in the migraine without aura group (χ(2) test, p < 0.0001). CONCLUSION: Spontaneous rotatory vertigo was more frequent in migraine with aura, whereas triggered nonrotatory vertigo was more frequent in migraine without aura. This finding suggests a broad spectrum of clinical symptomatology in vestibular migraine patients. All of these patients are classified as vestibular migraine but they may represent two extremes of a disease spectrum.


Assuntos
Transtornos de Enxaqueca/classificação , Transtornos de Enxaqueca/complicações , Vertigem/complicações , Adulto , Feminino , Humanos , Pessoa de Meia-Idade , Transtornos de Enxaqueca/diagnóstico , Vertigem/diagnóstico , Vestíbulo do Labirinto
7.
Rev Bras Parasitol Vet ; 23(3): 315-9, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25271450

RESUMO

Among the factors that influence the diversity of ectoparasites on bat hosts are the kind of roost and the host's social behavior. Other factors such as sex, reproductive condition and host size may influence the distribution and abundance of ectoparasites. The aim of the present study was to analyze the variation in Streblidae ectoparasites on the bat Phyllostomus hastatus, according to sex and roost type. We caught bats in four houses on Marambaia Island, municipality of Mangaratiba, and in one house at the Federal Rural University of Rio de Janeiro, municipality of Seropédica. We caught 65 females and 50 males of P. hastatus and 664 streblids of four species: Aspidoptera phyllostomatis, Strebla consocia, Trichobius "dugesii" complex and Trichobius longipes. The species T. longipes accounted for more than 99% of all the ectoparasites caught. Female bats were more parasitized than males, in terms of both prevalence and average intensity. The total number of parasites did not vary between resident and non-resident bats. The relationship between the number of individuals of T. longipes and sex and roost type was significant for resident bats. The total number of parasites on males did not differ between bachelor roosts and mixed-sex roosts. The differences found between roosts reflected the differences between the sexes.


Assuntos
Quirópteros/parasitologia , Dípteros/fisiologia , Animais , Brasil , Feminino , Masculino
8.
Rev. bras. parasitol. vet ; 23(3): 315-319, Jul-Sep/2014. tab, graf
Artigo em Inglês | LILACS | ID: lil-722706

RESUMO

Among the factors that influence the diversity of ectoparasites on bat hosts are the kind of roost and the host's social behavior. Other factors such as sex, reproductive condition and host size may influence the distribution and abundance of ectoparasites. The aim of the present study was to analyze the variation in Streblidae ectoparasites on the bat Phyllostomus hastatus, according to sex and roost type. We caught bats in four houses on Marambaia Island, municipality of Mangaratiba, and in one house at the Federal Rural University of Rio de Janeiro, municipality of Seropédica. We caught 65 females and 50 males of P. hastatus and 664 streblids of four species: Aspidoptera phyllostomatis, Strebla consocia, Trichobius “dugesii” complex and Trichobius longipes. The species T. longipes accounted for more than 99% of all the ectoparasites caught. Female bats were more parasitized than males, in terms of both prevalence and average intensity. The total number of parasites did not vary between resident and non-resident bats. The relationship between the number of individuals of T. longipes and sex and roost type was significant for resident bats. The total number of parasites on males did not differ between bachelor roosts and mixed-sex roosts. The differences found between roosts reflected the differences between the sexes.


Os fatores que influenciam a diversidade de artrópodes ectoparasitos no morcego hospedeiro incluem o tipo de abrigo e o comportamento social da espécie hospedeira. Aspectos como sexo, condição reprodutiva e tamanho do hospedeiro podem influenciar a distribuição e a abundância dos ectoparasitos. Este trabalho teve como objetivo analisar a variação no parasitismo de estreblídeos em Phyllostomus hastatus, considerando os sexos e diferentes abrigos. Os morcegos foram capturados em quatro casas na Ilha da Marambaia, município de Mangaratiba, e em uma casa na Universidade Federal Rural do Rio de Janeiro, município de Seropédica. Foram capturados 65 fêmeas e 50 machos de P. hastatus e 664 dípteros estreblídeos distribuídos em quatro espécies: Aspidoptera phyllostomatis, Strebla consocia, Trichobius complexo “dugesii” e Trichobius longipes. A espécie T. longipes representou mais de 99% das capturas de Streblidae. Fêmeas de morcegos foram mais parasitadas que os machos, tanto em prevalência quanto em intensidade média. O total de parasitos não variou entre os morcegos residentes e os não residentes. O modelo considerado entre o total de T. longipes, o sexo e o abrigo para indivíduos residentes mostrou-se significativo. O total de parasitos em machos não difere entre aqueles oriundos de abrigos de machos solteiros e de abrigos heterossexuais. As diferenças entre os abrigos refletem a diferença no parasitismo entre os sexos dos hospedeiros.


Assuntos
Animais , Feminino , Masculino , Quirópteros/parasitologia , Dípteros/fisiologia , Brasil
9.
Biosci. j. (Online) ; 29(5): 1370-1387, sept./oct. 2013. ilus, tab
Artigo em Português | LILACS | ID: biblio-946945

RESUMO

A Reserva Biológica da Serra do Japi (REBIO) pode ser considerada área prioritária de preservação, pois representa uma das últimas grandes áreas de floresta contínua do estado de São Paulo. O objetivo deste trabalho foi inventariar a comunidade de mamíferos desta reserva, empregando-se diferentes metodologias não-invasivas de amostragem. As amostragens foram realizadas durante os períodos de julho/agosto de 2009 e janeiro/fevereiro de 2010 utilizando as metodologias de armadilha fotográfica, parcelas de areia, procura por rastros, coleta de fezes para microscopia de pêlos e procura por vestígios de mamíferos. A REBIO apresentou uma riqueza de 34 espécies de mamíferos não-voadores, sendo duas espécies domésticas, distribuídas em oito ordens e 21 famílias. O maior número de espécies foi identificado pela metodologia de parcelas de areia (n = 18) seguida de visualização (n = 17), identificação de rastros (n = 14), armadilhas fotográficas (n = 9) e coleta de fezes (n = 10). Apesar de ser uma Unidade de Conservação de Proteção Integral, a REBIO sofre com intensa visitação de turistas e "trilheiros", principalmente nos finais de semana, já que existe permissão de visitas monitoradas pelo órgão gestor. No presente estudo, espécies que podem indicar perturbação da biodiversidade, como Hydrochoerus hydrochaeris e Didelphis aurita, não apresentaram alta frequência de captura, demonstrando que apesar da invasão de espécies exóticas, domésticas e da pressão antrópica, a área apresenta relevante grau de preservação.


Serra do Japi Biological Reserve can be considered as a priority area for conservation, since it represents one of the last areas of continuous forests in the state of São Paulo. The objective of the present study was to inventory the mammal fauna of this reserve, through different non-invasive sampling methods. Sampling was carried out in July/August 2009 and January/February 2010, using camera traps, sand plots, search for tracks, collection of feces for hair microscopy, and search for traces. Serra do Japi Biological Reserve exhibited a richness of 34 non-volant mammal species; distributed into eight orders and 21 families, among them two species of domestic mammals. The greatest number of species was identified by the methodology of sand plots (n = 18) followed by visualization (n = 17), identification of tracks (n = 14), camera traps (n = 9) and feces collection (n = 10). Despite being a fully protected reserve, Serra do Japi Biological Reserve is intensively visited by tourists and hikers, mainly on weekends, since monitored visits are allowed by the management. In the present study, species that could indicate disturbance, such as Hydrochoerus hydrochaeris and Didelphis aurita, did not show high frequency of capture, showing that despite the invasion by exotic and domestic species, as well as the anthropic pressure, the area is still in a good conservation status.


Assuntos
Ecossistema , Pradaria , Mamíferos
10.
Vet Parasitol ; 181(2-4): 267-73, 2011 Sep 27.
Artigo em Inglês | MEDLINE | ID: mdl-21571437

RESUMO

This work aimed to assess the effect of the fungus Metarhizium anisopliae on off-host Rhipicephalus (Boophilus) microplus from tick-infested Brachiaria decumbens pasture undergoing cattle grazing. For this purpose a naturally tick-infested Brachiaria decumbens pasture of 60 m × 100 m with twelve grazing Holstein Friesian-Nelore (Bos indicus) cross breed bovines was sprayed 12 times, 21 days apart with an aqueous conidial suspension of the E9 isolate of M. anisopliae fungus. Control pasture was treated with conidial suspension vehicle only. Efficacy of treatment was evaluated by tick larvae counts on the pasture and that of engorged female ticks on grazing cattle. Fungus persistence on grass stems as well as soil pasture was assessed after each spray. Efficacy of fungus against ticks was also measured by an in vitro immersion test. Whereas in vitro test showed a clear pathogenic effect of the fungus on ticks, no pathogenic effect over R. (B.) microplus ticks was detected in the field trial by spraying pasture with fungal suspension. Fungus from the suspension could be recovered from both the grass stem as well as the soil of sprayed pasture, even though the numbers obtained varied distinctly and could only be recovered shortly after spray. Pasture environments with exposure to sun and rain, seem to be very detrimental to the fungus, thus suspensions which provide fungus with protection or more resistant isolates to these should be looked for. In order to achieve high fungal efficacy against tick under field conditions, accurate laboratory assays, optimization of application strategy and knowledge of interactions between fungal strains and environmental factors are warranted.


Assuntos
Doenças dos Bovinos/prevenção & controle , Metarhizium/fisiologia , Controle Biológico de Vetores/métodos , Rhipicephalus/microbiologia , Infestações por Carrapato/veterinária , Criação de Animais Domésticos , Animais , Bovinos , Meio Ambiente , Feminino , Poaceae , Solo , Infestações por Carrapato/prevenção & controle , Fatores de Tempo
11.
Neurosci Lett ; 485(2): 121-4, 2010 Nov 19.
Artigo em Inglês | MEDLINE | ID: mdl-20816920

RESUMO

In the last decade, several genes have been linked to Parkinson's disease (PD), including GIGYF2, ATP13A2 and GBA. To explore whether mutations in these genes contribute to development of PD in the Brazilian population, we screened 110 patients with early-onset PD. No clearly pathogenic mutations were identified in ATP13A2 and GIGYF2. In contrast, we identified a significantly higher frequency of known pathogenic mutations in GBA gene among the PD cases (6/110=5.4%) when compared to the control group (0/155) (P=0.0047). Our results strongly support an association between GBA gene mutations and an increased risk of PD. Mutations in GIGYF2 and ATP13A2 do not seem to represent a risk factor to the development of PD in the Brazilian population. Considering the scarcity of studies on GIGYF2, ATP13A2 and GBA mutation frequency in Latin American countries, we present significant data about the contribution of these genes to PD susceptibility.


Assuntos
Proteínas de Transporte/genética , Glucosilceramidase/genética , Doença de Parkinson/genética , Doença de Parkinson/metabolismo , ATPases Translocadoras de Prótons/genética , Fatores Etários , Idoso , Brasil/etnologia , Análise Mutacional de DNA/métodos , Feminino , Predisposição Genética para Doença/genética , Humanos , Masculino , Pessoa de Meia-Idade , Doença de Parkinson/enzimologia , Fatores de Risco
12.
Exp Appl Acarol ; 50(2): 169-79, 2010 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19693680

RESUMO

Cerrado biome, the South American savannah, covers about 2 million km(2) and is very rich in endemic species but threatened by agriculture. In this report free-living tick species are presented, and their seasonal and relative distribution within the various phytophysiognomies in a small Cerrado reserve in Minas Gerais State, Brazil. Overall 2,694 free-living ticks were found during a 2 years sampling period with CO(2) traps and cloth dragging. Of these, 73.5% were Amblyomma cajennense and 0.6% Amblyomma dubitatum. All other ticks (25.9%) were retained as Amblyomma spp. Adults of A. cajennense peaked in spring, the nymphs in winter of both years. Amblyomma larval clusters were found in autumn and winter. Adult ticks (46.7%) and nymphs (39.5%) were most often found in woodlands, whereas most larval clusters were found in valley-side marshes (39%). Amblyomma cajennense, Anocentor nitens, Rhipicephalus (Boophilus) microplusand Rhipicephalus sanguineus ticks were found on domestic animals from neighboring properties. Search for Rickettsia in the hemolymph of 497 A. cajennense and one A. dubitatum ticks yielded negative results. Results confirmed earlier reports on the overwhelming prevalence of A. cajennense ticks in the Cerrado biome of Brazil and added information to habitat preferences of this tick species, a major vector in Brazil of the Rocky Mountain spotted fever.


Assuntos
Ixodidae/fisiologia , Animais , Brasil , Conservação dos Recursos Naturais , Ecossistema , Ixodidae/microbiologia , Ninfa , Rickettsia/isolamento & purificação , Estações do Ano , Fatores de Tempo
13.
REBLAMPA Rev. bras. latinoam. marcapasso arritmia ; 11(2): 85-9, abr.-jun. 1998. ilus, tab
Artigo em Português | LILACS | ID: lil-218514

RESUMO

Uma das grandes restriçöes para o aumento da longevidade dos marcapassos é a necessidade de grandes quantidades de energia (acima do limiar de estimulaçäo) para garantir uma estimulaçäo segura. O objetivo deste trabalho é analisar a performance de um algoritmo baseado na presença ou ausência do potencial evocado pós-estimulaçäo ventricular, que permite reduzir com segurança a energia do pulso do marcapasso a valores próximos do limiar crônico de estimulaçäo. Entre Janeiro e Agosto de 1997 um marcapasso Logos DDD (Biotronik), que apresenta este algoritmo foi instalado, em 10 pacientes, sendo 7 do sexo masculino e 3 do sexo feminino. Pela análise do algoritmo constatou-se a efetividade do auto-teste no controle da captura ventricular, bem como a confiabilidade e a segurança na estimulaçäo através da análise do Holter 24 horas. Verificou-se assim que é posssível aumentar com segurança a longevidade do marcapasso através da diminuiçäo da energia do pulso.


Assuntos
Humanos , Masculino , Feminino , Idoso , Pessoa de Meia-Idade , Eletrodos , Íons , Potenciais da Membrana , Marca-Passo Artificial , Período Pós-Operatório , Fatores de Tempo
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