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Coswosk JA, Ferreira RA, Soares EDG, Faria LRR. Responses of Euglossine Bees (Hymenoptera, Apidae, Euglossina) to an Edge-Forest Gradient in a Large Tabuleiro Forest Remnant in Eastern Brazil. Neotrop Entomol 2018; 47:447-456. [PMID: 28540533 DOI: 10.1007/s13744-017-0533-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 05/03/2017] [Indexed: 06/07/2023]
Abstract
Euglossine fauna of a large remnant of Brazilian Atlantic forest in eastern Brazil (Reserva Natural Vale) was assessed along an edge-forest gradient towards the interior of the fragment. To test the hypotheses that the structure of assemblages of orchid bees varies along this gradient, the following predictions were evaluated: (i) species richness is positively related to distance from the forest edge, (ii) species diversity is positively related to distance from the edge, (iii) the relative abundance of species associated with forest edge and/or open areas is inversely related to the distance from edge, and (iv) relative abundance of forest-related species is positively related to distance from the edge. A total of 2264 bees of 25 species was assessed at five distances from the edge: 0 m (the edge itself), 100 m, 500 m, 1000 m and 1500 m. Data suggested the existence of an edge-interior gradient for euglossine bees regarding species diversity and composition (considering the relative abundance of edge and forest-related species as a proxy for species composition) but not species richness.
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Affiliation(s)
- J A Coswosk
- Depto de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Univ Federal do Espírito Santo, São Mateus, ES, Brasil
- Programa de Pós-Graduação em Biodiversidade Tropical (PPGBN/CEUNES/UFES), São Mateus, ES, Brasil
| | - R A Ferreira
- Depto de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Univ Federal do Espírito Santo, São Mateus, ES, Brasil
| | - E D G Soares
- Depto de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Univ Federal do Espírito Santo, São Mateus, ES, Brasil
- Instituto Latino-Americano de Ciências da Vida e da Natureza, Univ Federal da Integracão Latino-Americana (UNILA), Av. Tarquínio Joslin dos Santos, 1000, Jardim Universitário, Foz do Iguaçu, Paraná, 85870-901, Brasil
| | - L R R Faria
- Depto de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Univ Federal do Espírito Santo, São Mateus, ES, Brasil.
- Instituto Latino-Americano de Ciências da Vida e da Natureza, Univ Federal da Integracão Latino-Americana (UNILA), Av. Tarquínio Joslin dos Santos, 1000, Jardim Universitário, Foz do Iguaçu, Paraná, 85870-901, Brasil.
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Álvares-Carvalho SV, Silva-Mann R, Gois IB, Melo MFV, Oliveira AS, Ferreira RA, Gomes LJ. Restoration over time and sustainability of Schinus terebinthifolius Raddi. Genet Mol Res 2017; 16:gmr-16-02-gmr.16029669. [PMID: 28613379 DOI: 10.4238/gmr16029669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The success of recovery programs on degraded areas is dependent on the genetic material to be used, which should present heterozygosity and genetic diversity in native and recovered populations. This study was carried out to evaluate the model efficiency to enable the recovery of a degraded area of the Lower São Francisco, Sergipe, Brazil. The target species for this study was Schinus terebinthifolius Raddi. Three populations were analyzed, the recovered area, seed-tree source population, and native tree population border established to the recovered area. The random amplified polymorphic DNA (RAPD) markers were used for diversity analysis. Genetic structure was estimated to evaluate the level of genetic variability existent in each population. There was no correlation between the spatial distribution and the genetic distances for all trees of the recovered area. The heterozygosity present in the recovered population was higher than the native tree population. The seed-tree source population presents genetic bottlenecks. Three clusters were suggested (ΔK = 3) with non-genetic structure. High intra-population genetic variability and inter-population differentiation are present. However, gene flow may also introduce potentially adaptive alleles in the populations of the recovered area, and the native population is necessary to ensure the sustainability and maintenance of the populations by allelic exchange.
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Affiliation(s)
- S V Álvares-Carvalho
- Programa de Pós-Graduação em Agricultura e Biodiversidade, Laboratório do Grupo de Pesquisa em Conservação, Melhoramento e Gestão de Recursos Genéticos/GENAPLANT, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - R Silva-Mann
- Laboratório do Grupo de Pesquisa em Conservação, Melhoramento e Gestão de Recursos Genéticos/GENAPLANT, Departamento de Engenharia Agronômica, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - I B Gois
- Programa de Pós-Graduação em Genética e Melhoramento, Universidade Federal de Viçosa, Viçosa, MG, Brasil
| | - M F V Melo
- Centro de Ciências Agrárias, Universidade Federal de Alagoas, Rio Largo, AL, Brasil
| | | | - R A Ferreira
- Centro de Ciências Agrárias Aplicadas, Departamento de Ciências Florestais, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - L J Gomes
- Centro de Ciências Agrárias Aplicadas, Departamento de Ciências Florestais, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
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Ferreira RA, Roma-Rodrigues C, Davies LC, Sá-Correia I, Martins-Dias S. A quantitative proteomic approach to highlight Phragmites sp. adaptation mechanisms to chemical stress induced by a textile dyeing pollutant. Sci Total Environ 2016; 573:788-798. [PMID: 27592466 DOI: 10.1016/j.scitotenv.2016.08.169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 08/23/2016] [Accepted: 08/23/2016] [Indexed: 06/06/2023]
Abstract
Phragmites sp. is present worldwide in treatment wetlands though the mechanisms involved in the phytoremediation remain unclear. In this study a quantitative proteomic approach was used to study the prompt response and adaptation of Phragmites to the textile dyeing pollutant, Acid Orange 7 (AO7). Previously, it was demonstrated that AO7 could be successfully removed from wastewater and mineralized in a constructed wetland planted with Phragmites sp. This azo dye is readily taken up by roots and transported to the plant aerial part by the xylem. Phragmites leaf samples were collected from a pilot scale vertical flow constructed wetland after 0.25, 3.25 and 24.25h exposure to AO7 (400mgL-1) immediately after a watering cycle used as control. Leaf soluble protein extraction yielded an average of 1560 proteins in a broad pI range (pH3-10) by two-dimensional gel electrophoresis. A time course comparative analysis of leaf proteome revealed that 40 proteins had a differential abundance compared to control (p<0.05) within a 3.25h period. After 24.25h in contact with AO7, leaf proteome was similar to control. Adaptation to AO7 involved proteins related with cellular signalling (calreticulin, Ras-related protein Rab11D and 20S proteasome), energy production and conversion (adenosine triphosphate synthase beta subunit) carbohydrate transport and metabolism (phosphoglucose isomerase, fructose-bisphosphate aldolase, monodehydroascorbate reductase, frutockinase-1 and Hypothetical protein POPTR_0003s12000g and the Uncharacterized protein LOC100272772) and photosynthesis (sedoheptulose-1,7-bisphosphatase and ferredoxin-NADP+ reductase). Therefore, the quantitative proteomic approach used in this work indicates that mechanisms associated with stress cell signalling, energy production, carbohydrate transport and metabolism as well as proteins related with photosynthesis are key players in the initial chemical stress response in the phytoremediation process of AO7.
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Affiliation(s)
- R A Ferreira
- Centre for Natural Resources and the Environment (CERENA), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - C Roma-Rodrigues
- Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - L C Davies
- Centre for Natural Resources and the Environment (CERENA), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - I Sá-Correia
- Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - S Martins-Dias
- Centre for Natural Resources and the Environment (CERENA), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
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Souza EMS, Pereira GS, Silva-Mann R, Álvares-Carvalho SV, Ferreira RA. A comparative framework of the Erythrina velutina tree species in reforested land and native populations. Genet Mol Res 2016; 15:gmr8534. [PMID: 27323200 DOI: 10.4238/gmr.15028534] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Erythrina velutina Willd. (Fabaceae: Papillionoideae) is a pioneer species found in tropical and subtropical regions of the world that has medicinal properties and that is used in reforestation projects. This species is rare in some areas of northeastern Brazil. This study aimed to characterize and compare genetic structures of natural and restored populations of E. velutina, with a focus on the selection of tree seeds. A total of 108 individuals from five natural populations and one restored population were analyzed using ISSR markers, resulting in 407 polymorphic fragments. A high rate of polymorphism was observed in the restored population. The highest genetic variability was identified within populations (82%). Genetic bottleneck tests were significant for the Carmópolis/Rosário do Catete and Laranjeiras natural populations along with the Laranjeiras restored population. Genetic distances significantly correlated with spatial distance. Only the restored population retained unique alleles. Similarly, increased genetic distance was observed in individuals of the restored populations compared to the other populations. Observed genetic variation in both natural and restored populations of E. velutina was moderate, thus enabling selection of divergent trees from those trees supplying seeds. Environmental protection and management of these areas is necessary for the maintenance of these individuals and subsequent reproduction. We recommend suggestions for E. velutina conservation, since the restoration model adopted in this study did not promote the development of the specimens until the reproductive stage in a fashion that aims to augment the soil seed bank supply, as is suggested for pioneer species.
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Affiliation(s)
- E M S Souza
- Programa de Pós-Graduação em Agricultura e Biodiversidade, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - G S Pereira
- Programa de Pós-Graduação em Biotecnologia em Recursos Naturais, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - R Silva-Mann
- Departamento de Agronomia, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - S V Álvares-Carvalho
- Programa de Pós-Graduação PNPD-CAPES, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - R A Ferreira
- Departamento de Ciências Florestais, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
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Silva PP, Ferreira RA, Nunes JF, Sousa JA, Romanielo LL, Noronha FB, Hori CE. PRODUCTION OF HYDROGEN FROM THE STEAM AND OXIDATIVE REFORMING OF LPG: THERMODYNAMIC AND EXPERIMENTAL STUDY. Braz J Chem Eng 2015. [DOI: 10.1590/0104-6632.20150323s00003441] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Baccarin T, Ferreira RA, Gazoni VF, Yunes RA, Malheiros A, Lucinda-Silva RM. Influence of Extraction Parameters on Hydroalcohol Extracts of the Stem Bark of <i>Rapanea ferruginea</i> Mez Using Myrsinoic Acid B as Marker. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i7.15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Brizon VSC, Filho PMO, Ferreira EF, Ferreira RA, Zarzar PM. P1-102 Prevalence of dental injuries and its association with alcohol use among adolescents. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976c.95] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Davies LC, Pedro IS, Ferreira RA, Freire FG, Novais JM, Martins-Dias S. Constructed wetland treatment system in textile industry and sustainable development. Water Sci Technol 2008; 58:2017-2023. [PMID: 19039183 DOI: 10.2166/wst.2008.753] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This study focuses on the evaluation of the adequacy and sustainability of a constructed wetland (CW), with vertical flow (VF) design to treat a strongly coloured textile wastewater.Secondly an accidental AO7 overloaded discharge (700 mg l(-1)) was studied. A set of three similar VFCW beds (3x1 m2), operating in series, allowed also the efficient treatment of the AO7 heavy loaded wastewaters. The treated effluent quality enables water reuse for irrigation purposes or within the process.
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Affiliation(s)
- L C Davies
- IBB-Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
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Mendonça PP, Ferreira RA, Vidal Junior MV, Andrade DR, Santos MVB, Ferreira AV, Rezende FP. Influência do fotoperíodo no desenvolvimento de juvenis de Tambaqui (Colossoma Macropomum). ARCH ZOOTEC 2007. [DOI: 10.21071/az.v58i223.5173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Cento e sessenta alevinos de tambaqui (Colossoma macropomum) (peso médio de 11,01±2,08 g e comprimento total de 7,8±0,18cm) condicionados em dezesseis aquários de 40 litros de água com temperatura de 29,1±0,413°C, densidade de estocagem de 0,25 alevinos/l e aeração constante, com o objetivo de avaliar a quantidade de luz no desempenho produtivo dos peixes. Os tratamentos consistiram dos fotoperíodos: T1= 6 horas de luz:18 horas de escuro (06HL:18HE), T2= 12HL:12HE, T3= 18HL:06HE e T4= 24HL:0HE, com quatro repetições cada. Os alevinos foram alimentados duas vezes ao dia, com ração comercial extrusada (28% de proteína bruta). Diariamente era trocado 40 vezes o volume total da água. Ao final de 32 dias, foi avaliado comprimento total, comprimento padrão, altura, consumo de ração, ganho de peso e sobrevivência. Os resultados demonstraram que os maiores fotoperíodos influenciaram de forma positiva o desempenho produtivo dos alevinos de tambaqui.
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Ferreira RA, Vastert SJ, Abinun M, Foster HE, Modesto C, Olivé T, Kuis W, Wulffraat NM. Hemophagocytosis during fludarabine-based SCT for systemic juvenile idiopathic arthritis. Bone Marrow Transplant 2006; 38:249-51. [PMID: 16770315 DOI: 10.1038/sj.bmt.1705415] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Silva DAO, Vitaliano SN, Mineo TWP, Ferreira RA, Bevilacqua E, Mineo JR. Evaluation of homologous, heterologous, and affinity conjugates for the serodiagnosis of Toxoplasma gondii and Neospora caninum in maned wolves (Chrysocyon brachyurus). J Parasitol 2006; 91:1212-6. [PMID: 16419770 DOI: 10.1645/ge-527r.1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Use of serological tests in the diagnosis of infectious diseases in wild animals has several limitations, primarily the difficulty of obtaining species-specific reagents. Wild canids, such as maned wolves (Chrysocyon brachyurus), are highly predisposed to infection by Toxoplasma gondii and, to a lesser extent, to Neospora caninum. The aim of the present study was to evaluate homologous, heterologous, and affinity conjugates in enzyme-linked immunosorbent assays (ELISAs) and indirect fluorescent antibody tests (IFATs) for detecting immunoglobulin (Ig) G antibodies against T. gondii and N. caninum in maned wolves. Serum samples were obtained from 59 captive animals in Brazil and tested by ELISA for T. gondii serology and IFAT for N. caninum serology using 3 different enzymatic and fluorescent conjugates: homologous (guinea pig anti-maned wolf IgG-peroxidase and -fluorescein isothiocyanate [FITC]), heterologous (rabbit anti-dog IgG-peroxidase and -FITC), and affinity (protein A-peroxidase and -FITC). Seropositivity to T. gondii was comparable among the homologous (69.5%), heterologous (74.6%), and affinity (71.2%) enzymatic conjugates. A significant positive correlation was found between the antibody levels determined by the 3 enzymatic conjugates. The highest mean antibody levels (ELISA index = 4.5) were observed with the protein A-peroxidase conjugate. The same seropositivity to N. caninum (8.5%) was found with the homologous and heterologous fluorescent conjugates, but protein A-FITC was not able to detect or confirm any positive samples with homologous or heterologous conjugates. Our results demonstrate that homologous, heterologous, and affinity conjugates might be used in ELISA for serological assays of T. gondii in wild canids, whereas for N. caninum infection, only the homologous or heterologous fluorescent conjugates have been shown to be useful.
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Affiliation(s)
- D A O Silva
- Laboratory of Immunoparasitology, Universidade Federal de Uberlândia, MG, Brasil
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Vitaliano SN, Silva DAO, Mineo TWP, Ferreira RA, Bevilacqua E, Mineo JR. Seroprevalence of Toxoplasma gondii and Neospora caninum in captive maned wolves (Chrysocyon brachyurus) from southeastern and midwestern regions of Brazil. Vet Parasitol 2004; 122:253-60. [PMID: 15262003 DOI: 10.1016/j.vetpar.2004.04.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/16/2004] [Indexed: 10/26/2022]
Abstract
The main purpose of the present study was to investigate the occurrence of antibodies against T. gondii and N. caninum in captive maned wolves from Brazil, considering that little information is available at the literature about infections by these parasites in this wild animal. Serum samples were obtained from 59 maned wolves originated from six zoos and from one ecological reserve of the southeastern and midwestern regions of Brazil. To detect IgG antibodies against T. gondii, an ELISA protocol was used and the results were expressed as ELISA reactivity indexes (EI). Serology for N. caninum was carried out by indirect fluorescent antibody test (IFAT) and cut-off titers were established at 1:25 dilution. From the total of the analyzed samples, 44 (74.6%) were seropositive for T. gondii and only 5 (8.5%) for N. caninum. Seropositivity for T. gondii ranged from 0 to 100% in the seven different origin locals, with rates over 50% among the six zoos, whereas no positivity was found in the samples from ecological reserve. For N. caninum, seroprevalence varied from 0 to 50% in the different locals, with the highest rates also detected in zoos. Seroprevalence for T. gondii was strongly related with age, with rates significantly higher among adult wolves (91.7%) when compared to newborn or young animals. Seropositive samples for N. caninum were found predominantly in adult wolves. For both parasites, seroprevalence did not show a significant distinction in relation to gender. Although seroprevalence for T. gondii was significantly higher when compared to N. caninum in the Brazilian captive maned wolves tested, these findings reflect the great exposure of this species to T. gondii and, in lower extension, to N. caninum. Also, the present study demonstrated for the first time the presence of antibodies to N. caninum in wild life from South America.
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Affiliation(s)
- S N Vitaliano
- Laboratório de Imunologia, Universidade Federal de Uberlândia, Av. Pará 1720, Campus Umuarama, 38400-902 Uberlândia, MG, Brazil
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Ferreira RA, Oliveira AB, Gualberto SA, Vitor RWA. Activity of natural and synthetic naphthoquinones against Toxoplasma gondii, in vitro and in murine models of infection. Parasite 2002; 9:261-9. [PMID: 12375370 DOI: 10.1051/parasite/2002093261] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The effect of 14 natural and synthetic naphthoquinones in the replication of Toxoplasma gondii was evaluated. In vitro studies were accomplished in cultures of 2C4 fibroblasts infected with RH-strain. Enzyme-linked immunosorbent assay was used to quantify parasite growth. For the studies in vivo, mice were infected with tachyzoites of the RH strain or cysts of the T. gondii EGS strain. In vitro, seven naphthoquinones demonstrated significant inhibition of intracellular T. gondii growth at concentrations of 1 and 5 micrograms/ml. Only three compounds were significantly protective when tested in animals: 2-hydroxy-3'-(3'-pentenyl)-1,4-naphthoquinone (PHNQ4), 2-hydroxy-3-(1'-vinylphenyl)-1,4-naphthoquinone (PHNQ5), and 2-hydroxy-3-(1'-propen-3'-phenyl)-1,4-naphthoquinone (PHNQ6). In animals infected with the EGS strain and treated with PHNQ4 (50 mg/kg/day orally), a 7-day prolongation of the time to death was observed. Treatment with 100 mg/kg/day orally or 50 mg/kg/day i.p. of PHNQ5 resulted in a 5-day and 16-day prolongation of the time to death, respectively. Treatment with 50 mg/kg/day orally or 50 mg/kg/day i.p. of PHNQ6 resulted in a 4-day prolongation of the time to death or up to 30 days after treatment, respectively. Our results suggest that the naphthoquinones may be important therapeutic agents for the treatment of toxoplasmosis.
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Affiliation(s)
- R A Ferreira
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, Minas Gerais, Brazil
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Ferreira RA, Peret Filho LA, Goulart EM, Valadão MM. [Undergraduate students of "Universidade Federal de Minas Gerais": profile and trends]. Rev Assoc Med Bras (1992) 2000; 46:224-31. [PMID: 11070513 DOI: 10.1590/s0104-42302000000300007] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE this study was made with the medical students of the "Universidade Federal de Minas Gerais" (UFMG), to get their social economic profile, and their reasons for studying medicine, choosing the specialty, doing medical residence, and showing preferences for being a liberal professional or a salaried employee. METHODS In 1997, a study was made comparing UFMG's medical students beginning their clinical practice (5th semester) and those medical students during the internship in the last term of clinical practice. Both groups were given questionnaires for evaluation. RESULTS The results were similar for both groups and showed that women constituted almost 50% of the students and about 50% of them were from Belo Horizonte, the State capital of Minas Gerais, Brazil, and from small families with less than three children, and whose parents held a college degree. These students passed the college entrance exams on their first try. Two thirds of their families had income of about 10 to 50 Brazilian minimum wages, and approximately 12% of the families had an income of less than 10 minimum wages. The majority of the students decided to study medicine for altruism or vocational reason; very few (<5%) chose to study medicine for financial reasons. Almost all students (98%) preferred a liberal medical practice; however 80% would accept civil-service employment as an alternative. Nearly all of them (98%) chose to do medical residence to specialize. Most students would prefer to be specialists and only less than 20% would prefer to do general practice in areas such as adult and pediatric clinic, gynecology-obstetric and general surgery. CONCLUSION This study shows that medical students from UFMG have an elite social economic profile and a preference for specialized medical practice.
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Affiliation(s)
- R A Ferreira
- Trabalho realizado no Departamento de Pediatria, Faculdade de Medicine da Universidade Federal de Minas Gerais
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Abstract
Serum samples from 107 cervids were examined for Toxoplasma gondii antibodies using indirect hemagglutination (IHA), indirect immunofluorescence (IFA), enzyme linked immunosorbent assay (ELISA) and Dot-ELISA. Samples were obtained from 66 marsh deer (Blastocerus dichotomus) in the State of São Paulo (Brazil) and from 41 pampas deer (Ozotocerus bezoarticus) in the State of Goiás (Brazil). Antibodies to T. gondii were found in 23 (22%) of the deer, with 18 and 5 positive samples, respectively, for B. dichotomus and O. bezoarticus. The highest prevalence of T. gondii antibodies were young adults (32%), following by adults (27%) and fawns (13%). Only one serum sample (8%) from a newborn fawn was positive in the serological tests. The convenience of the Dot-ELISA test is obvious when compared with other serological tests for both laboratory or field surveys, mainly due to its features of practicability and reagent stability.
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Affiliation(s)
- R A Ferreira
- Universidade Federal de Uberlândia, Department of Pathology, Uberlândia-MG, Brazil
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Ferreira RA, Alves MA. [Primary non-hodgkin lymphoma of the testicle]. Actas Urol Esp 1997; 21:777-80. [PMID: 9412229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- R A Ferreira
- Servicio de Urología, Hospital Senhora da Oliveira, Guimaraes, Portugal
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Herdy GV, Lopes VG, Pinheiro LA, Ferreira RA, Sacre JM, Lipka P, Drummond S, Al Odeh CS. [Diphtheric myocarditis: clinico-pathologic correlation of 20 cases]. Arq Bras Cardiol 1988; 50:323-7. [PMID: 3240113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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Penna FJ, Mota JA, Roquete ML, de Carvalho AS, de Oliveira Lemos AT, Barbosa AJ, Leao E, Ferreira RA, de Paula Castro L. Coeliac disease in identical twins. Arch Dis Child 1979; 54:395-7. [PMID: 573100 PMCID: PMC1545565 DOI: 10.1136/adc.54.5.395] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Coeliac disease occurred at the same age in MZ twins. The diagnosis was confirmed by histology of the small intestine, rapid response to a gluten-free diet, and relapse after reintroduction of gluten.
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Guimarães RC, Ferreira RA, da Silva BR. [Anatomo-clinical study of 2 cases of Letterer-Siwe disease]. Rev Hosp Clin Fac Med Sao Paulo 1971; 26:5-14. [PMID: 5553904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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