Literatura académica sobre el tema "PARASITOLOGIA MÉDICA"
Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros
Consulte las listas temáticas de artículos, libros, tesis, actas de conferencias y otras fuentes académicas sobre el tema "PARASITOLOGIA MÉDICA".
Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.
También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.
Artículos de revistas sobre el tema "PARASITOLOGIA MÉDICA"
Edler, Flavio Coelho. "Pesquisa clínica e experimental no Brasil oitocentista: circulação e controle do conhecimento em helmintologia médica". História, Ciências, Saúde-Manguinhos 17, n.º 3 (2010): 739–55. http://dx.doi.org/10.1590/s0104-59702010000300010.
Texto completoMezzari, Adelina. "O uso da Aprendizagem Baseada em Problemas (ABP) como reforço ao ensino presencial utilizando o ambiente de aprendizagem Moodle". Revista Brasileira de Educação Médica 35, n.º 1 (marzo de 2011): 114–21. http://dx.doi.org/10.1590/s0100-55022011000100016.
Texto completoJacobina, Ronaldo Ribeiro y Ester Aida Gelman. "Juliano Moreira e a Gazeta Medica da Bahia". História, Ciências, Saúde-Manguinhos 15, n.º 4 (diciembre de 2008): 1077–97. http://dx.doi.org/10.1590/s0104-59702008000400011.
Texto completoCosta, Tom Ravelly Mesquita, João Dutra de Araujo Neto, Amanda Azevedo Torres, Victor Trindade da Cruz, Rafael Santos Correia, Daniela Winckler Mass, Pedro Henrique dos Santos Silva, Andréia Ferreira dos Santos, Wanessa Cândida de Paula y Karina Rodrigues dos Santos. "Aplicação do lúdico para o ensino de saúde na educação médica da cidade de Parnaíba, Piauí: relato de experiência". Revista Eletrônica Acervo Saúde 12, n.º 11 (20 de agosto de 2020): e3833. http://dx.doi.org/10.25248/reas.e3833.2020.
Texto completoMezzari, Adelina, Isabele Iser, Adília Maria Pereira Wiebbelling y Liane Tarouco. "O uso do Moodle como reforço ao ensino presencial de parasitologia e micologia no curso de graduação em medicina". Revista Brasileira de Educação Médica 36, n.º 4 (diciembre de 2012): 557–63. http://dx.doi.org/10.1590/s0100-55022012000600016.
Texto completoKaminsky, Rina G. "Revista Médica Hondureña: Noventa años de aportes en parasitología". Revista Médica Hondureña 88, n.º 1 (1 de marzo de 2020): 8–15. http://dx.doi.org/10.5377/rmh.v88i1.11601.
Texto completoDias-Lima, Artur, Marcos da Costa Silva, Lidia Cristina Villela Ribeiro, Maria Teresita Bendicho, Hermila Tavares Vilar Guedes y Denise Carneiro Lemaire. "Avaliação, Ensinagem e Metodologias Ativas: uma Experiência Vivenciada no Componente Curricular Mecanismos de Agressão e de Defesa, no curso de Medicina da Universidade do Estado da Bahia, Brasil". Revista Brasileira de Educação Médica 43, n.º 2 (junio de 2019): 216–24. http://dx.doi.org/10.1590/1981-52712015v43n2rb20180037.
Texto completoBurstein, Zuño y Franco Romaní-Romaní. "Breve reseña de vida y contribución del médico parasitólogo peruano César Gabriel Náquira Velarde". Revista Peruana de Medicina Experimental y Salud Pública 37, n.º 1 (24 de marzo de 2020): 169–73. http://dx.doi.org/10.17843/rpmesp.2020.371.5246.
Texto completoPaiva, Carlos Henrique Assunção. "Samuel Pessoa: uma trajetória científica no contexto do sanitarismo campanhista e desenvolvimentista no Brasil". História, Ciências, Saúde-Manguinhos 13, n.º 4 (diciembre de 2006): 795–831. http://dx.doi.org/10.1590/s0104-59702006000400002.
Texto completoGonzález-Argote, J., G. E. Escalante-Collazo y A. A. García-Rivero. "Microbiología y parasitología médicas en el contexto epidemiológico". Revista de la Fundación Educación Médica 21, n.º 1 (2018): 55. http://dx.doi.org/10.33588/fem.211.932.
Texto completoTesis sobre el tema "PARASITOLOGIA MÉDICA"
Ribeiro, Junior Artur Guido Muniz. "Epidemiologia das parasitoses intestinais e toxocariase no municipio Pedro de Toledo - SP". [s.n.], 2002. http://repositorio.unicamp.br/jspui/handle/REPOSIP/308556.
Texto completoDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas
Made available in DSpace on 2018-11-07T17:36:41Z (GMT). No. of bitstreams: 1 RibeiroJunior_ArturGuidoMuniz_M.pdf: 3959751 bytes, checksum: 5e84da84ec30c0699213bbf607145e01 (MD5) Previous issue date: 2002
Resumo: Apresenta-se um estudo transversal de base populacional no município de Pedro de Toledo -Vale do Ribeira - São Paulo - Brasil, que teve por objetivo estimar a prevalência de enteroparasitos, a intensidade de infecção por helmintos e a prevalência de Toxocara canis, e relacionar essas prevalências com as variáveis sexo, idade, zona de moradia, esgoto, tipo de água, bronquite, dor abdominal, diarréia, hemoglobina e eosinófilos. Em 2000, foram estudados de forma aleatória 224 pacientes e destes foram coletadas 224 amostras de fezes para exame microscópico, 177 amostras de sangue para realização do estudo sorológico de T. canis e 162 amostras de sangue para dosagem dos níveis de hemoglobina e contagem de eosinófilos. A prevalência de enteroparasitos foi de 56,7%, com 72,4% na zona rural e 33,3% na zona urbana. A prevalência de T. canis foi 39%, com 31,8% na zona rural e 50% na zona urbana. o enteroparasito mais prevalente foi Ascaris lumbricoides (36,6%), cujas prevalências foram 52,2% na zona rural e 13,3% na zona urbana; seguido pelo Trichuris trichiura (16,5%,) cujas fteqüências foram 16,4% na zona rural e 16,6% na zona urbana; Strongyloides stercoraZis(13,8%), cujas prevalências foram 16,4% na zona rural e 10% na zona urbana; ancilostomatídeos (12,9%) cujas fteqüências foram 20,2% na zona rural e 2,2% na zona urbana; Giardia duodenaZis (8,%), cujas prevalências foram 5,2% na zona rural e 12,2% na zona urbana e Schistosoma mansoni (1,8%), cujas prevalências foram 1,5% na zona rural e 2,2% na zona urbana. Outros parasitos encontrados foram Entamoeba histolytica-dispar (0,9%), Enterobius vermicularis (0,9%) e Hymenolepis nana (0,45%) que por seus baixos números, não foram incluídos no estudo. Protozoários comensais foram encontrados, tais como, EndoZimax nana (8,9%) e Entamoeba coZi (10,7%), não foram incluídos no estudo. Blastocystis hominis foi encontrado em 4,5% da população, foi discutido separadamente não foi incluído na conclusão pelo fato de sua patogenicidade ainda não ter sido comprovada. A intensidade severa de infecção por helmintos na população foi 18,8%, somente na infecção por A. lumbricoides. Os enteroparasitos infectaram igualmente ambos os sexos, foram mais prevalentes na população cujas casas não possuíam fossas e estiveram associados com a zona rural, idade abaixo ou igual à quinze anos e ingestão de água não filtrada. Toxocara canis infectou igualmente ambos os sexos, foi mais prevalente na população com idade igual ou inferior à quinze anos e esteve associado com a zona urbana e com a ausência de fossas. Houve associação da infecção por enteroparasitos e T canis com dor abdominal e diarréia e associação entre intensidade severa de infecção por A. lumbricoides e infecção por ancilostomatídeos com a dor abdominal. Houve associação entre infecção por enteroparasitos, A. lumbricoides, T trichiura, Strongyloides stercoralis, ancilostomatídeos e infecção por T canis com a contagem de eosinófilos acima de 600/mm3. Não houve diferenças entre os níveis de hemoglobina da população parasitada e da população não parasitada
Abstract: A base population cross sectional study on Pedro de Toledo county is presented with objectives to stimate the prevalence of enteroparasites, the helminths intensity infecction and prevalence of Toxocara canis and to conect these prevalences with the variables; sex, age, residence area, kind of waste, kind of water, bronchitis, abdominal pain, diarrhoea, eosinophil and hemoglobin. In 2.000, 224 pacients were studied and of these 224 feces samples were colected for microscopic examination, 177 blood samples were colected to achieve the serological study for Toxocara canis and 162 bood samples were colected to estimate the hemoglobin levels and eosinophil count. The prevalence of enteroparasites was 56,7%, with 72,4% in the rural area and 33,3% in the urban area. The prevalence of T. canis was 39%, with 31,8% in the rural area and 50% in the urban area. The most prevalent enteroparasite was Ascaris lumbricoides (36,6%), whose prevalences were 52,2% in the rural area and 13,3% in the urban area, followed by Trichuris trichiura (16,5%) whose frequencies were 16,4% in the rural area and 16,6% in the urban area; Strongyloides stercoralis (13,8%) whose prevalences were 16,4% in the rural area and 10% in the urban area; hookworm (12,9%) whose frequencies were 20,2% in the rural area and 2,2% in the urban area; Giardia duodenalis ( 8,%) whose prevalences were 5,2% in the rural area and 12,2% in the urban area and Schistosoma mansoni (1,8%), whose frequencies were 1,5%in the rural area and 2,2% in the urban area. Other parasites found, were Entamoeba histolytica-dispar (0,9%), Enterobius vermicularis (0,9%) and Hymenolepis nana (0,45%), tOOtby their low numbers, were not included in the study. Comensal protozoans were found, like Endolimax nana (8,9%) and Entamoeba coli (10,7%), were not included in the study. Blastocystis hominis was found in the 4,5% from population, was discussed separately and was not included in the conclusion because his patogenicity has not proved yet. The severe intensity of infection by helminths in population was 18,8%, only in A. lumbricoides infection. The enteroparasites infected equally both sexs, were more prevalent in the population whose houses had not septic tanks in their houses and were associated with the rural area, age under or same to fifteen years and ingestion of non filtered water. Toxocara canis infected equally both sexs, was more prevalent in the population with age under or same to fifteen years and was associated with urban area and absence of septi tanks. There was association between enteroparasites and T. canis infection with abdominal pain and diarrhoea, and association between the severe intensity of infection by A. lumbricoides and hookworm infection with abdominal pain. There was associaton between enteroparasites infection, A. lumbricoides, T. trichiura, Strongyloides stercoralis, hookworm and T. canis infection with eosinophil count above then 600/mm3. There were not diferences between the levels of hemoglobin from parasited population and from the non parasited population
Mestrado
Mestre em Saude Coletiva
Lima, Meire Maria de. "Propriedades termodinâmicas da Prolil Oligopeptidase de Trypanosoma brucei". reponame:Repositório Institucional da UnB, 2008. http://repositorio.unb.br/handle/10482/8895.
Texto completoSubmitted by wiliam de oliveira aguiar (wiliam@bce.unb.br) on 2011-06-30T18:33:48Z No. of bitstreams: 1 2008_MeireMariadeLima.pdf: 2224259 bytes, checksum: 392adeabf9cda08bfe409fb7327df412 (MD5)
Approved for entry into archive by Raquel Viana(tempestade_b@hotmail.com) on 2011-07-03T21:32:58Z (GMT) No. of bitstreams: 1 2008_MeireMariadeLima.pdf: 2224259 bytes, checksum: 392adeabf9cda08bfe409fb7327df412 (MD5)
Made available in DSpace on 2011-07-03T21:32:58Z (GMT). No. of bitstreams: 1 2008_MeireMariadeLima.pdf: 2224259 bytes, checksum: 392adeabf9cda08bfe409fb7327df412 (MD5)
Trypanosoma brucei secreta uma prolil oligopeptidase (POPTb) que parece estar envolvida na patogênese da doença do sono. Essa enzima é capaz de hidrolizar hormônios peptídicos contendo resíduos de prolina e considerada um potencial alvo para o desenvolvimento de drogas contra a patologia. Como a estrutura tridimensional da POPTb ainda não foi resolvida, dicroísmo circular e espectroscopia de fluorescência foram utilizados para estudo da estrutura e estabilidade da enzima bem como para a identificação de aditivos que possam ser utilizados nos experimentos de cristalização e na estocagem da proteína. Parâmetros termodinâmicos e estruturais foram calculados a partir de experimentos de desnaturação térmica e química e de estudos de atenuação da fluorescência. Cloreto de guanidina (GuHCl) promoveu a desnaturação da proteína em concentrações quase 30% menores que uréia. Divergência encontrada nos valores de ΔG determinados a partir de experimentos de desnaturação química e térmica sugere a presença de intermediários no processo de desdobramento da proteína. Sugere, também, maior estabilidade estrutural. Sorbitol se mostrou capaz de estabilizar a POPTb enquanto brometo de hexadecil-trimetilamônia (CTAB), na concentração de 0,1 mM, provocou o efeito oposto levando à quase total inatividade da enzima. A ação do ditiotreitol (DTT) é pH-dependente, reduzindo a estabilidade da enzima em pH neutro e aumentando-a em pH alkalino. Experimetos de atenuação da fluorescência mostraram dependência do pH e heterogeneidade no ambiente dos triptofanos com pelo menos um resíduo desse aminoácido próximo ao sítio ativo. A enzima parece estar menos sujeita a alterações conformacionais em pH 7.5. A elevação da temperatura resultou na redução da concentração micelar crítica (cmc) do CTAB. _________________________________________________________________________________ ABSTRACT
Trypanosoma brucei secrets a prolyl oligopeptidase (POPTb) which is possibly involved in the pathogenesis of sleeping sickness. It is able to hydrolyze prolinecontaining peptide hormones and is therefore considered a good target for the development of drugs to treat the disease. As the crystal structure of POPTb has not been solved yet, we used circular dichroism and fluorescence spectroscopy to gain some knowledge on the enzyme structure, stability and on additive effects for both crystallization assays and storage. Thermodynamic and structural parameters were calculated from thermal and chemical denaturation studies as well as from fluorescence quenching experiments, respectively. The concentration of guanidine hydrochloride (GuHCl) that led to protein denaturation was nearly 30% that of urea needed to reach the same effect. Divergence in the ΔG values derived from chemical and thermal unfolding assays suggests the presence of intermediate states in the process. It also suggests higher structural stability. Sorbitol increases enzyme stability and 0.1 mM cetyl trimethyl ammonium bromide (CTAB) decreases it almost halting enzyme activity. Ditiotreitol (DTT), however, has the former effect in alkaline pH and the latter effect in neutral pH. Fluorescence quenching experiments show dependence on pH and indicate heterogeneity in the environment of the surface-accessible tryptophan residues with at least one such residue near the enzyme active site. POPTb molecule seems to be less subjected to conformational changes at pH 7.5. The increase in temperature lowers CTAB critical micelle concentration (cmc).
FERREIRA, Daniela. "Sequênciação e análise do genoma de um presumível flavivírus isolado de Aedes (Ochlerotatus) caspius". Master's thesis, Instituto de Higiene e Medicina Tropical, 2013. http://hdl.handle.net/10362/13988.
Texto completoThe genus Flavivirus (Flaviviridae) includes over seventy viruses with ssRNA genomes, many of which are important pathogens of humans and other animals. Flaviviruses comprehend tick-borne, mosquito-borne and no known vector viral agents, as well as so-called “non-classical flaviviruses” (Cook and Holmes, 2006) with no known vertebrate host. They are commonly placed at the roots of phylogenetic trees of the genus, are frequently found in mosquitoes, and have been tentatively designated insect-specific flaviviruses (ISF) (Farfan-Ale et al., 2009). While classification of ISF as flaviviruses is supported by their genetic organization, protein hydropathy plots, conserved polyprotein cleavage sites and enzyme domains, they are antigenically distinct from other flaviviruses, and share approximately the same level of nucleotide sequence identity with other members of the genus as when compared to the members of the two other established genera in the Flaviviridae family (Cook and Holmes, 2006; Gould et al., 2003). This work reports the initial characterization, including near full-length sequence and genome analysis, of an new ISF, tentatively designated OCFVPt, that was isolated from Aedes (Ochlerotatus) caspius (Pallas, 1771) adult mosquitoes, found in high densities in the coastal, and estuarine, districts of Setúbal and Faro (Almeida et al., 2008). This virus replicates rapidly in the Ae. albopitus-derived C6/36 cell line and, as expected for an ISF, does not replicate in Vero cells. Unexpectedly, unlike most ISF, OCFVPt seems to cause pronounced cytophatic effect in C6/36 cells, which round-up and rapidly detach from a solid support soon after infection. Electron microscope analysis of thin sections of C6/36 cells at 48h post-infection with OCFVPt revealed nuclear hyperplasy, and evident enlargement of the intercisternal space of the nuclear envelope, which is also filled with multiple sized vesicles. The OCFVPt genome is, at least, 9,839 nt long and encodes a single polyprotein showing all the features expected for a flaviviruses. The phylogenetic trees, based on alignment of viral sequences, resulted in similar topologies, in which OCFVPt always seems to form, along with the recently reported HANKV (Huhtamo et al., 2012), a divergent genetic line within the ISF radiation.
OLIVEIRA, Marta Margarida de Figueiredo. "Optimization of screening methods for the evaluation of the antileishmanial potential of halophytes and macroalgae from the Iberian coast". Master's thesis, Instituto de Higiene e Medicina Tropical, 2015. http://hdl.handle.net/10362/19168.
Texto completoSOUSA, Karina Pires. "Caracterização bioquímica de metaloproteinases de parasitas tripanosomatídeos". Master's thesis, Instituto de Higiene e Medicina Tropical, 2013. http://hdl.handle.net/10362/14029.
Texto completoThe identification and characterization of metalloprotease-mediated processes from a variety of eukaryotes is progressing at a rapid rate, both at the molecular and cellular levels – and the many roles that proteases play in these organisms are coming into focus. Matrix metalloproteinases carry out housekeeping tasks common to many eukaryotes, as well as functioning at a much more specific level in parasitic life cycles, for instance. Central roles have been proposed in diverse processes, such as cell invasion and egress, encystation, excystation, catabolism of proteins, differentiation, cell cycle progression, cytoadherence, and both stimulation and evasion from immune responses. In this study, a characterization of the metalloproteases from two different extracts is presented: Trypanosoma brucei brucei and Leishmania infantum. Classification into the metalloprotease class has been accomplished by means of differential inhibition of the activity of these proteases over different substrates (gelatin and casein), and a survey of selective inhibitors with potential use on new chemotherapeutical strategies against these agents was performed. Additionally, a bioinformatic study regarding a metalloprotease which is common to the parasites in study is conducted, and branches out this study to related organisms. The results herein presented demonstrate the presence of metalloproteases capable of degrading matrix proteins in all of the extracts studied, and that their activity can be inhibited with moderate concentrations of inhibitors. Furthermore, the results suggest that in all the pathological events discussed here, the presence of active metalloproteases is indeed stable to their life cycles and in the progression of the pathology caused by the diverse biological agents in study. The analysis of all the results and observations may possibly lead to the identification and integration of common elements in the processes of cellular invasion and parasitic progression explained here. For that reason, the understanding of these interactions remains an outstanding challenge.
Flores, Rodrigo Echeverria. "Níveis séricos de interleucina-12 e fator de necrose tumoral-a em diferentes apresentações clínicas de toxoplasmose". Pontifícia Universidade Católica do Rio Grande do Sul, 2005. http://hdl.handle.net/10923/4336.
Texto completoToxoplasmosis is an universal zoonosis, transmitted so much through oral contamination, as well by congenital route. The protozoan, Toxoplasma gondii, provokes a strong cellular immune response, pattern Th1, that do not overcome the infection but that takes most of the patients to an asymptomatic chronic stage. In some areas of the south of the country, there is a high prevalence of ocular lesions, caused by toxoplasmosis, most of them acquired cases. In this study was determined the variability of the seric levels of two important citokynes in the immune response to the Toxoplasma, Interleukin 12 (IL-12) and Tumor Necrosis Factor- a (TNF-a). The analisis were performed in 106 patients' sera with different clinical forms of the disease (scarred ocular lesion, lesion ocular reactivated, recent disease and chronic toxoplasmosis) and in 31 healthy controls. Significantly higher levels of IL-12 were observed in individuals with scarred ocular lesions, when compared with all groups of pacients and controls (p<0,005). There was no significant diference in the TNF-a seric levels beetwen the groups. The results shows the viability of new studies, in order to obtain a possible application of the seric determination of IL-12 in medical routine, as a prognostic test, mainly in the cases of ocular toxoplasmosis.
A Toxoplasmose é uma zoonose universal, transmitida tanto através de contaminação oral, quanto de maneira congênita. O protozoário causador, Toxoplasma gondii, provoca no organismo uma forte resposta imune celular, padrão Th1, que não resolve a infecção mas que leva a maioria das pessoas a um estágio crônico assintomático. Em algumas regiões do sul do país, há uma elevada prevalência de lesões oculares, causadas por toxoplasmose, a maioria delas adquiridas. Nesse estudo determinou-se a variabilidade dos níveis séricos de duas citocinas importantes na resposta imune ao Toxoplasma, a Interleucina 12 (IL-12) ) e o Fator de Necrose Tumoral-α (TNF-α). Foram analisados soros de 106 pacientes com diferentes apresentações clínicas da doença (lesão ocular cicatrizada, lesão ocular recidivante, doença recente e toxoplasmose crônica assintomática) e de 31 controles sadios, obtendo-se valores significativamente mais elevados de IL-12 nos indivíduos que apresentavam lesões oculares cicatrizadas, quando comparados com todos os outros grupos de pacientes e controles (p<0,005). Os valores de TNF-α não apresentaram diferenças entre os grupos. Os resultados apontam para a viabilidade de novos estudos, visando a uma possível aplicação da determinação de IL-12 sérica na prática clínica, como teste prognóstico nos casos de toxoplasmose ocular.
LEMOS, Joana Catarina Matias de. "Prevalência e distribuição de coinfecção por dirofilariose e leishmaniose canina em Portugal". Master's thesis, Instituto de Higiene e Medicina Tropical, 2015. http://hdl.handle.net/10362/19156.
Texto completoDirofilariasis and Leishmaniasis are infections caused by the parasitic nematode Dirofilaria immitis and the protozoan Leishmania infantum, respectively. These two vector-borne parasites share, not only the same geographic distribution, as well as similar endemic foci. As other Mediterranean countries, Portugal is also endemic for both parasitic diseases. The aim of this study was to estimate the prevalence and co-infection caused by D. immitis and L. infantum in dogs in central Portugal regions (Coimbra, Santarém and Setúbal). For this purpose, 299 dogs, with more than six months old, housed in kennels from those districts were evaluated. The prevalence of D. immitis in the districts of Coimbra, Setúbal and Santarém was 13.8%, 22.7% and 35.4%, respectively, while the prevalence of L. infantum was 1.06%, 2.3% and 2.7%, respectively. It was found a statistically significant association (χ2 = 13.417, P = 0.001) between the prevalence of D. immitis infection and the districts. Santarém was the district with more positive cases of D. immitis (46/77). Associations between individual parameters (age, sex and body hair) and clinical manifestations (skin lesions, lymph nodes, oedema/ascites and respiratory signs) with the prevalence for each parasite were established. Statistically significant associations were only detected between D. immitis infection and the dog’s age. Co-infection with both parasites was detected only in one case from the district of Setúbal [0.33% (0,1-1,9; 95% CI)]. This study sought to investigate the occurrence of co-infection and co-endemicity in those regions in order to design, if required, integrated control measures against dirofilariasis and leishmaniasis. It was found that co-infection is not significant, possibly due to the low prevalence of L. infantum infection.
ALVES, Joana Baptista. "Epidemiologia da malária em Cabo Verde - factores genéticos humanos e estrutura populacional do mosquito vector". Doctoral thesis, Instituto de Higiene e Medicina Tropical, 2010. http://hdl.handle.net/10362/6040.
Texto completoMalaria is one of the main health problems worldwide and involves complex interactions between human, vector and parasite. As otherparasitic and infectious diseases, malaria has had an important signature on evolution viewing the human genetic contribution to the disease susceptibility and outcome.Despite control measureshave being applied for decades,malaria continues to bepresent on Santiago Island where it persistsinlow endemic condition. Nowadays,people present moderate manifestation, submicroscopic infectionisdetected, and vectors occur nearbysusceptible populations. The frequency of the main human genetic polymorphism associated to malaria and the population structure of the vector are unknown. The general mainobjectivesof this work were1) to study two classic human genetics factors associated to malaria, namely sickle cell trait andglucose-6-phosphate dehydrogenase deficiencyand to analyse a putative evolvement of other erythrocyte enzymopathy-pyruvate kinase deficiency) and 2) to analyse the population structure of the malaria vector, aiming at understandingmalaria epidemiology and better designing ofappropriate measures. The work addressed the detection ofthe allele associated to haemoglobinSandpolymorphismson the G6PDand PKLRgenes in unrelated individuals (Infected and Non-Infected), trying to assessa putative association with infection. Regarding mosquito vectors, a PCR-basedanalysis and genotyping of microsatellite lociof Anopheles arabiensiswas carried out.ConcerningHBBgene, the sickle cell trait frequency (Individual HbAS) was 6%, with HbSfrequency of 5%and G6PDvariants was 0,8% for G6PDA-and0,0% for G6PDMed.No association between genotypes of these two factors and infection was detected. As regardsPKLR gene, no clear association was detected between polymorphisms and the state of infection but marked linkage disequilibrium among distant lociand lociin the gene was revealed only in the Non Infected individuals, which maymean that this could be a more conserved region selected in association to protection against the infection and/or disease.The genetic diversity of A. arabiensis, at the 11 microsatellitelocianalysed,was moderate with values of Herangingfrom 0,481 to 0,522 and Rsfrom 4 to 5. The level of genetic differentiation,based on 7 polymorphic loci,was low but significant with a mean estimated pairwise FSTof 0,012 (p<0,001), ranging from 0,001 to 0,023 between population pairs. TheKdrallele associated to insecticide resistance was not detected.The low frequencyof G6PD-deficiency associated alleles(A-and Med) have strong implication on the strategy for the malaria control defined by the National Programme of Malaria Control (PNLP) once primaquinemust be administered as therapeuticsregimen. The analysis of A. arabiensisfrom Santiago Island revealedahomogeneous and weakly structured population. Thisresult, on one partmay mean a disadvantage to the control of mosquito vectors as it may facilitate a putative dispersion of resistance genes. However, on the other part this homogeneity could make an introduction of transgenic vectors feasible.
NETO, Zoraima Naymbi da Silva. "Biological characterization of de-ubiquitylating enzymes (UBPs/UCHs) in Plasmodium spp as potential drug targets". Doctoral thesis, Instituto de Higiene e Medicina Tropical, 2014. http://hdl.handle.net/10362/19274.
Texto completoMalaria continues to be a major public healthconcern. Drug resistance continues to threaten all efforts made to control the disease. Hence there is a race to identify new antimalarial drugs that act on newer targets, in order to minimize the spread of drug resistance. The ubiquitin/proteasome pathway has been idientified as a potential drug target. Mutations in de-ubiquitylating enzymes (DUBs),which catalyze the removal of ubiquitin,havebeen associated with the developmentof infectiousand non infectious diseases. In this project four DUBs namely pfuch-l1, pfuch-l3, pfuch-l54and pfubp-8were identified in the Plasmodiumfalciparumgenome and were characterized. Theexpression profile of genes encoding DUBsthroughout the parasite ́s life cycle with and without drug treatment wascarried out by RT-PCR.Polyclonal antibodies raised in mice were used to detect protein abundance in different stages of the parasite ́s life cycle. An attempt was made to produce a DUB knockoutlineand determine whether they are essential for the parasite. Recombinant proteins were expressed in E.colicells and their de-ubiquitylating activity was tested usinga specific substrate for DUBs.The activity of curcumin (a Dub inhibitor)was evalutedinvitroon the recombinant proteinsand its antimalarialactivity was testedin association with chloroquine and artemisininin anin vivorodent malaria model,Plasmodium chabaudi. A proteomics approach was also used to determine what proteins were deregulated in response to curcumin treatment.The results show that P.falciparumgenes pfuch-l1, pfuch-l3, pfuch-l54and pfubp-8are differentially expressed throughout the parasite ́s life cycle and those proteins are more abundant at the trophozoite and schizont stages of the parasite.Treatment of parasites with artemisinin, chloroquine, and curcumin induced a transientincrease in the expression of those genes,followed by a steadydecrease in the gene expressionpattern.No viable pfuch-l1and pfuch-l3gene knockout lines were obtained.Recombinant proteins were successfully expressed in E.colicellswith the exception of Pfuch-l54.Pfuch-l1, Pfuch-l3, Pfubp-8demonstrated de-ubiquitylating activity by cleaving the substrate Ub-AMC. In vitroIC50 of curcumin towards recombinant Pfuch-l1was 15μM, for recombinant Pfuch-l3was 25.4μM and forPfubp-8was 10μM and for human USP2 was 5μM. Curcumin displayed some toxicity to the HepG2 cell lines, but the in vivoantimalarial activityassays in the rodent model of malaria Plasmodium chabaudishowedthat curcumin is non toxic to miceand the association of curcumin with chloroquine displayedsynergism whereas theassociation of curcumin with artemisinin showed antagonism. The proteomics assay performed in P.falciparumcultures treated with curcuminrevealed10deregulatedproteins.The proteins identified were involved in sulfur metabolism, protein translation and degradation, cell cycleand cellular organization. In conclusion, the presentstudyshowed that P.falciparumDUBs are indeed potential drug targets. However further molecular, biochemicaland phamacological studies will be required in ordertoturn the inhibitors more specific towards the parasite ́s enzymes andminimise damage to the host ́s proteins.
Candido, Renata Russo Frasca. "Estudo das características físico-químicas e propriedades magnéticas da superfície do ovo de Schistosoma mansoni e Schistosoma japonicum". Pontifícia Universidade Católica do Rio Grande do Sul, 2014. http://hdl.handle.net/10923/7095.
Texto completoSchistososmiasis is a chronic endemic infection caused by parasites of the genus Schistosoma, and it occurs in 74 countries in Africa, South America and Asia. The three main agents of this infection in humans are: Schistosoma mansoni and Schistosoma japonicum, that cause the hepatic-intestinal disease, and Schistosoma haematobium, responsible for the genitourinary infection. Despite the effective treatment like praziquantel, schistososmiasis remains as the second most prevalent parasitic disease in the world. Diagnosis of the intestinal schistososmiasis is achieved through the direct visualization of the eggs in fecal samples. The current method recommended by the World Health Organization in epidemiological studies is the Kato-Katz method. Despite it being simple and cheap, in areas of low endemicity this technique loose sensibility, leading to the occurrence of false-negative cases and underestimation of the prevalence in the studied area. Helmintex™ is a coproparasitological method highly sensitive that allows the isolation of Schistosoma eggs from 30 grams of feces, based in the interaction between the eggs and paramagnetic microspheres in a magnetic field. However, this method demands time and specialized equipment, being of difficult manipulation in work field. The mechanism that promotes the interaction between the paramagnetic spheres with the Schistosoma eggs is not known. Considering the necessity of sensitive diagnostic tools of easy applicability in epidemiological studies in low endemicity areas, this work has the purpose to study the surface physical-chemical characteristics of S. mansoni and S. japonicum eggs, in order to enhance the efficiency of the Helmintex™ method. S. mansoni and S. japonicum eggs were isolated from livers of experimentally infected mice. The eggs were submitted to morphological and structural analysis using Scanning and Transmission Electron Microscopy and elemental analysis using Energy Disperssion Spectroscopy. The magnetic susceptibility was determined using SQUID (Superconducting Quantum Interference Device) and the concentration of the chemical elements was determined through Atomic Emission Spectroscopy. Experiments to elucidate the interaction properties of the eggs of the eggs and the microspheres were conducted incubating the eggs from both species with different paramagnetic microspheres. The results show that the egg surface of both species is recovered by a dense layer of microspines, being those shorter and less spaced in S. mansoni. The eggs spontaneously bind the particles, with a greater preference for magnetic material. S. japonicum eggs have a higher affinity for paramagnetic microspheres than S. mansoni eggs. The presence of streptavidin in the surface of the microspheres enhances the affinity of both species for non-magnetic material, however it decreases the affinity for paramagnetic microspheres. Despite the presence of iron in the eggshell of S. mansoni and S. japonicum, the origin of the interaction does not seem to be magnetic, but, based in the difference of electrostatic charges present in the surface of the eggs and the microspheres. The continuity of this study is important to determine the physical-chemical characteristics of eggs from human feces, and it can lead to the upgrading and optimization of the Helmintex™ method. Studies using Atomic Force Microscopy are in progress.
A esquistossomose é uma infecção crônica endêmica causada por parasitos do gênero Schistosoma, e ocorre em países 74 países na África, América do Sul e Ásia. Os três principais agentes desta infecção em humanos são: Schistosoma mansoni e Schistosoma japonicum, causadores da doença hepato-intestinal, e Schistosoma haematobium, responsável pela infecção genitourinária. Apesar de haver tratamento efetivo como o praziquantel, a esquistossomose permanece como a segunda infecção parasitária mais prevalente no mundo. O diagnóstico da esquistossomose intestinal é feito através da direta visualização dos ovos em amostras fecais. O método atualmente recomendado pela Organização Mundial de Saúde em estudos epidemiológicos é o método de Kato-Katz. Apesar de simples e barato, em áreas de baixa endemicidade esta técnica perde sensibilidade, levando à ocorrência de casos falso-negativos e subestimação da prevalência da área estudada. O Helmintex® é um método coproparasitológico altamente sensível que permite o isolamento de ovos de Schistosoma à partir de 30 gramas de fezes, baseado na interação entre os ovos e esferas paramagnéticas em um campo magnético. Entretanto, este método demanda tempo e equipamentos especializados, sendo de difícil manipulação em estudos de campo.O mecanismo que promove a interação das esferas paramagnéticas com os ovos de Schistosoma não é conhecido. Tendo em vista a necessidade de ferramentas diagnósticas sensíveis e de fácil aplicabilidade em estudos epidemiológicos em áreas de baixa transmissão, este trabalho tem por objetivo estudar características físico-químicas da superfície dos ovos de S. mansoni e S. japonicum, afim de aprimorar a eficiência do método Helmintex®. Ovos de S. mansoni e S. japonicum foram isolados de fígados de camundongos experimentalmente infectados. Os ovos foram submetidos à analise morfológica e estrutural utilizando Microscopia Eletrônica de Varredura e Transmissão e análise elementar utilizando Espectroscopia por Dispersão de Energia. A susceptibilidade magnética foi determinada utilizando-se o SQUID (Superconducting Quantum Interference Device) e a concentração dos elementos químicos foi determinada através de Espectroscopia por Emissão Atômica. Experimentos para elucidar as propriedades de interação dos ovos e das microesferas foram conduzidos incubando ovos de ambas as espécies com diferentes microesferas paramagnéticas. Os resultados mostram que a superfície do ovo de ambas as espécies é recoberta por uma camada densa de microespinhos, sendo estes mais curtos e menos espaçados em S. mansoni. Os ovos espontaneamente ligam-se às partículas, com maior preferência por material magnético. Os ovos de S. japonicum possuem maior afinidade pelas microsesferas paramagnéticas do que os ovos de S. mansoni. A presença de estreptavidina na superfície das microesferas aumenta a afinidade de ambas as espécies por microesferas não-magnéticas, porém diminui a afinidade por microesferas paramagnéticas. Apesar da presença de ferro na casca do ovo tanto de S. mansoni quanto de S. japonicum, a origem da interação não parece ser magnética, e sim, baseada na diferença de cargas eletrostáticas presentes na superfície dos ovos e das microesferas. A continuidade deste estudo é importante para determinar as características físico-químicas de ovos provenientes de fezes humanas, e pode levar ao aprimoramento e otimização do método Helmintex®. Estudos utilizando-se Microscopia de Força Atômica encontram-se em andamento.
Libros sobre el tema "PARASITOLOGIA MÉDICA"
O'Fel, Ann. Parasitologie, mycologie: Maladies parasitaires et fongiques. 2a ed. La Madeleine: Editions C. et R., 1985.
Buscar texto completoHeinz, Mehlhorn y Armstrong P. M, eds. Encyclopedic reference of parasitology. 2a ed. Berlin: Springer, 2001.
Buscar texto completoPeters, Wallace. Médecine tropicale et parasitologie. Paris: Flammarion, 2004.
Buscar texto completoÉmil, Toma y Viens Pierre, eds. Introduction à la parasitologie humaine. Montréal, Qué: Décarie, 1993.
Buscar texto completoTilles, Gérard. Teignes et teigneux: Histoire médicale et sociale. Paris: Springer Paris, 2009.
Buscar texto completoColor atlas and textbook of diagnostic parasitology. New York: Igaku-Shoin, 1988.
Buscar texto completoBuckman, Rob. Human wild life: The life that lives on us. Toronto: Key Porter Books, 2002.
Buscar texto completoKerber, S. Pathologie infectieuse, santé et hygiène. 3a ed. Paris: Masson, 1990.
Buscar texto completoJ, Howard Barbara, ed. Clinical and pathogenic microbiology. 2a ed. St. Louis: Mosby, 1994.
Buscar texto completoCapítulos de libros sobre el tema "PARASITOLOGIA MÉDICA"
ANOFEL, Sandrine Houzé y Laurence Delhaes. "Entomologie médicale : techniques élémentaires". En Parasitologie et Mycologie Médicales, 45–50. Elsevier, 2022. http://dx.doi.org/10.1016/b978-2-294-77766-0.00002-9.
Texto completoAnofel, Françoise Botterel, M. L. Dardé, A. Debourgogne, L. Delhaes, S. Houzé, F. Morio, C. Kauffmann-Lacroix y C. Roques. "Entomologie médicale : techniques élémentaires". En Parasitologie et Mycologie Médicales - Guide des Analyses et des Pratiques Diagnostiques, 47–52. Elsevier, 2017. http://dx.doi.org/10.1016/b978-2-294-75363-3.00002-1.
Texto completoActas de conferencias sobre el tema "PARASITOLOGIA MÉDICA"
Silva, Giulia Zucolotto, Rômulo Pereira Cortez Júnior y Rosângela do Socorro Pereira. "EPIDEMIOLOGIA DOS ACIDENTES POR ANIMAIS PEÇONHENTOS, COM ÊNFASE EM ACIDENTES OFÍDICOS, NO ESTADO DO TOCANTINS, PERÍODO DE 2015 A 2018." En I Congresso Brasileiro de Parasitologia Humana On-line. Revista Multidisciplinar em Saúde, 2021. http://dx.doi.org/10.51161/rems/901.
Texto completoda Costa, Hildeman Dias, Ilária Sales Viana Oliveira, João Marcos Costa de Siqueira, Luiz Felipe Façanha Ramos y Carlos Francisco Borges Reis. "OCORRÊNCIA DA LEISHMANIOSE VISCERAL NO ESTADO DO MARANHÃO NO PERÍODO DE 2010 A 2019". En I Congresso Brasileiro de Parasitologia Humana On-line. Revista Multidisciplinar em Saúde, 2021. http://dx.doi.org/10.51161/rems/742.
Texto completoLacerda, Kandyce Medeiros, Bruna Gabriella Nascimento Bezerra, Mateus Figueiredo Braga, Rebeca Jerônimo de Aquino Silva y Ulisses Figueiredo de Sousa. "FATORES DESENCADEANTES DA EPILEPSIA EM QUADROS DE NEUROCISTICERCOSE: REVISÃO BIBLIOGRÁFICA". En I Congresso Brasileiro de Parasitologia Humana On-line. Revista Multidisciplinar em Saúde, 2021. http://dx.doi.org/10.51161/rems/714.
Texto completoda Silva, Gean Scherer, Saulo Bueno de Azeredo, Natália Gonçalves Rengel, Gabriela Kohl Hammacher y Fabiana Tonial. "MANEJO E PREVENÇÃO DE INFECÇÃO POR Trichomonas vaginalis EM MULHERES". En I Congresso Brasileiro de Parasitologia Humana On-line. Revista Multidisciplinar em Saúde, 2021. http://dx.doi.org/10.51161/rems/697.
Texto completoFreire, Isabela Franco, JÚLIA LEITÃO CABRAL, FRANCISCO WAGNER VASCONCELOS FREIRE FILHO y MARIA DE FÁTIMA FIGUEIREDO. "CARDIOMIOPATIA CHAGÁSICA: ETIOPATOGENIA E MANIFESTAÇÕES CLÍNICAS." En II Congresso Nacional de Microbiologia Clínica On-line. Revista Multidisciplinar em Saúde, 2022. http://dx.doi.org/10.51161/ii-conamic/14.
Texto completoAraujo, Lorena Caroline Rodrigues, Fernanda Nobre Amaral Villani, Cíntia Aparecida de Jesus Pereira y Walter dos Santos Lima. "ESTUDO DOS CONTEÚDOS E METODOLOGIAS DE PARASITOLOGIA NO ENSINO MÉDIO: PROPOSTA DIFERENCIADA DE GUIA DO EDUCADOR". En II Congresso Brasileiro de Parasitologia Humana On-line. Revista Multidisciplinar em Saúde, 2022. http://dx.doi.org/10.51161/conbrapah/39.
Texto completoDe Azevedo, Saulo Bueno, Gean Scherer da Silva, Gabriela Kohl Hammacher y Natália Gonçalves Rengel. "MANEJO DE INFECÇÃO POR TOXOPLASMOSE NO SISTEMA NERVOSO CENTRAL DE PACIENTES HIV POSITIVO". En I Congresso Brasileiro de Parasitologia Humana On-line. Revista Multidisciplinar em Saúde, 2021. http://dx.doi.org/10.51161/rems/689.
Texto completoCortez Júnior, Rômulo Pereira, Giulia Zucolotto Silva y Rosângela do Socorro Pereira Ribeiro. "ESTUDO EPIDEMIOLÓGICO DOS CASOS DE SÍFILIS CONGÊNITA NO MUNICÍPIO DE ARAGUAÍNA-TO NOS ANOS DE 2016 A 2019." En I Congresso Brasileiro de Parasitologia Humana On-line. Revista Multidisciplinar em Saúde, 2021. http://dx.doi.org/10.51161/rems/902.
Texto completoQueiroz, Aline Lima, Isadora Morelli Lopes Yabagata y Rosângela do Socorro Pereira Ribeiro. "INCIDÊNCIAS DE CASOS DE DENGUE E SEUS SOROTIPOS NOS ANOS DE 2015 A 2019 E SUA CORRELAÇÃO COM A MÉDIA PLUVIAL NO ESTADO DO TOCANTINS." En I Congresso Brasileiro de Parasitologia Humana On-line. Revista Multidisciplinar em Saúde, 2021. http://dx.doi.org/10.51161/rems/907.
Texto completoPereira, Douglas Alves, Fabiano Marques Rosa, Larissa Araújo Leal Reis, Sonaide Faria Ferreira Marques y Lucas Edel Donato. "ANÁLISE RETROSPECTIVA DE LEISHMANIOSE VISCERAL HUMANA E CANINA EM TERESINA DE GOIÁS, GOIÁS, BRASIL DE 2007 A 2021". En II Congresso Brasileiro de Parasitologia Humana On-line. Revista Multidisciplinar em Saúde, 2022. http://dx.doi.org/10.51161/conbrapah/24.
Texto completo