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Search Results: 1 - 10 of 416426 matches for " Franco Antonia M Ramos "
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Characterization of Endotrypanum (Kinetoplastida: Trypanosomatidae), a Unique Parasite Infecting the Neotropical Tree Sloths (Edentata)
Franco, Antonia M Ramos;Grimaldi Jr, Gabriel;
Memórias do Instituto Oswaldo Cruz , 1999, DOI: 10.1590/S0074-02761999000200026
Abstract: this article reviews current concepts of the biology of endotrypanum spp. data summarized here on parasite classification and taxonomic divergence found among these haemoflagellates come from our studies of molecular characterization of endotrypanum stocks (representing an heterogenous population of reference strains and isolates from the brazilian amazon region) and from scientific literature. using numerical zymotaxonomy we have demonstrated genetic diversity among these parasites. the molecular trees obtained revealed that there are, at least, three groups (distinct species?) of endotrypanum, which are distributed in central and south america. in concordance with this classification of the parasites there are further newer molecular data obtained using distinct markers. moreover, comparative studies (based on the molecular genetics of the organisms) have shown the phylogenetic relationships between some endotrypanum and related kinetoplastid lineages.
Characterization of Endotrypanum (Kinetoplastida: Trypanosomatidae), a Unique Parasite Infecting the Neotropical Tree Sloths (Edentata)
Franco Antonia M Ramos,Grimaldi Jr Gabriel
Memórias do Instituto Oswaldo Cruz , 1999,
Abstract: This article reviews current concepts of the biology of Endotrypanum spp. Data summarized here on parasite classification and taxonomic divergence found among these haemoflagellates come from our studies of molecular characterization of Endotrypanum stocks (representing an heterogenous population of reference strains and isolates from the Brazilian Amazon region) and from scientific literature. Using numerical zymotaxonomy we have demonstrated genetic diversity among these parasites. The molecular trees obtained revealed that there are, at least, three groups (distinct species?) of Endotrypanum, which are distributed in Central and South America. In concordance with this classification of the parasites there are further newer molecular data obtained using distinct markers. Moreover, comparative studies (based on the molecular genetics of the organisms) have shown the phylogenetic relationships between some Endotrypanum and related kinetoplastid lineages.
First World Congress on Leishmaniasis-World Leish1
Franco Antonia Maria Ramos
Memórias do Instituto Oswaldo Cruz , 1997,
Abstract:
Infec??o natural por tripanosomatídeos (Kinetoplastida: Trypanosomatidae) em Lutzomyia umbratilis (Diptera: Psychodidae) em áreas de leishmaniose tegumentar americana no Amazonas, Brasil
Pinheiro, Francimeire Gomes;Luz, Sérgio Luís Bessa;Franco, Antonia Maria Ramos;
Acta Amazonica , 2008, DOI: 10.1590/S0044-59672008000100019
Abstract: during the period of 2002 to 2003, there were collected sand flies in two areas of amazon state (forest combat training base - bi1 and tarum?-mirim). were collected the 1440 l. (nyssomyia) umbratilis female. lu. umbratilis is the main responsible for the transmission of american tegumentary leishmaniasis (atl) in the northern of amazon river. only 15 specimens (or 1,04%) presented natural infection with trypanosomatids, being 12 at bl1 and 3 at tarum?-mirim. the infection rate was 1,66% (12 of the 720 collected at bi1) and 0,42% (3 of the 720 at tarum?-mirim). these results confirm the previous informations described by other authors that insects have low rates of natural infection by trypanosomatids even in high endemic areas for leishmaniasis.
Feeding preference of the sand flies Lutzomyia umbratilis and L. spathotrichia (diptera: Psychodidae, Phlebotominae) in an urban forest patch in the city of Manaus, Amazonas, Brazil
Rocha, Liliane Coelho da;Lorosa, Nery Elias S;Franco, Antonia Maria Ramos;
Memórias do Instituto Oswaldo Cruz , 2004, DOI: 10.1590/S0074-02762004000600006
Abstract: precipitin tests were performed on blood meals of 199 sand flies (161 lutzomyia umbratilis, 34 l. spathotrichia, two lutzomyia of group shannoni, one l. anduzei) in a non-flooded upland forest on the campus of the universidade federal do amazonas. this is the second largest forest fragment in an urban setting in brazil. results on l. umbratilis, which is considered to be the principal leishmaniasis vector in this region, indicated rodents as its predominant blood source in contrast to previous reports in which blood meal analysis indicated that this species fed principally on xenarthra (particularly sloths)
A note on reproduction of Didelphis marsupialis in captivity
Motta, Maria de Fatima Dezonne;Carreira, Jo?o Carlos de Araujo;Franco, Antonia Maria Ramos;
Memórias do Instituto Oswaldo Cruz , 1983, DOI: 10.1590/S0074-02761983000400016
Abstract: conditions leading to successful reproduction of didelphis marsupialis in captivity are described. a trial involving four mating pairs which had been maintained at least four months in the laboratory resulted in three litters and one false pregnancy. this is, to our knowledge, the first record of successful breeding of this species in captivity.
Caracteriza??o isoenzimática de isolados humanos de Leishmania sp (Kinetoplastida: Trypanosomatidae) dos municípios de Rio Preto da Eva e Manaus, Estado do Amazonas
Figueira, Luanda de Paula;Zanotti, Michele;Pinheiro, Francimeire Gomes;Franco, Antonia Maria Ramos;
Revista da Sociedade Brasileira de Medicina Tropical , 2008, DOI: 10.1590/S0037-86822008000500016
Abstract: twenty-three isolates of leishmania sp from patients in the municipalities of rio preto da eva and manaus were characterized and identified by means of isoenzyme electrophoresis and the degree of similarity between the organisms was analyzed. the results indicated that leishmania guyanensis and leishmania naiffi were present in these two environments and that the leishmania naiffi samples were heterogenous.
Characterization of Endotrypanum Parasites Using Specific Monoclonal Antibodies
Ramos Franco Antonia Maria,Machado Gerzia MC,Naiff Roberto D,Moreira Celia FS
Memórias do Instituto Oswaldo Cruz , 1997,
Abstract: A large number of Endotrypanum stocks (representing an heterogeneous population of strains) have been screened against a panel of monoclonal antibodies (MAbs) derived for selected species of Endotrypanum or Leishmania, to see whether this approach could be used to group/differentiate further among these parasites. Using different immunological assay systems, MAbs considered specific for the genus Endotrypanum (E-24, CXXX-3G5-F12) or strain M6159 of E. schaudinni (E-2, CXIV-3C7-F5) reacted variably according to the test used but in the ELISA or immunofluorescence assay both reacted with all the strains tested. Analyses using these MAbs showed antigenic diversity occurring among the Endotrypanum strains, but no qualitative or quantitative reactivity pattern could be consistently related to parasite origin (i.e., host species involved) or geographic area of isolation. Western blot analyses of the parasites showed that these MAbs recognized multiple components. Differences existed either in the epitope density or molecular forms associated with the antigenic determinants and therefore allowed the assignment of the strains to specific antigenic groups. Using immunofluorescence or ELISA assay, clone E-24 produced reaction with L. equatorensis (which is a parasite of sloth and rodent), but not with other trypanosomatids examined. Interestingly, the latter parasite and the Endotrypanum strains cross-reacted with a number of MAbs that were produced against members of the L. major-L. tropica complex
Intradermorrea??o de Montenegro em c?es (Mammalia: Canidae) experimentalmente inoculados por Leishmaniaguyanensis e Leishmania braziliensis (Kinetoplastida: Trypanosomatidae), principais agentes causadores de Leishmaniose Tegumentar na Amaz?nia
Reis, S?nia Rolim;Naiff, Rogério Farias;Almeida-Campos, Flávia Naief;Franco, Antonia Ramos;
Acta Amazonica , 2008, DOI: 10.1590/S0044-59672008000300027
Abstract: positive montenegro's skin test is a delayed type hypersensitivity reaction widely used as indicative of infection with leishmania. montenegro's antigen consisted of a crude leishmania homologous antigen solution that was used as a skin test in five dogs experimentally inoculated with leishmania (viannia) spp. in this work it is shown that all animals infected presented an induration at the site of injection in contrast of the dogs non infected used as a control group. this demonstrated that the skin tests in dogs could be used to make an diagnosis of the leishmania infection.
Primeiro registro de Lutzomyia (Trichopygomyia) conviti Ramirez Perez, Martins & Ramirez (Diptera: Psychodidae) no Brasil
Pinheiro, Francimeire G;Freitas, Rui A de;Rocha, Liliane C da;Franco, Antonia M R;
Neotropical Entomology , 2010, DOI: 10.1590/S1519-566X2010000400033
Abstract: the presence of lutzomyia conviti ramirez perez, martins & ramirez, previously found only in venezuela and colombia, is recorded for the first time in brazil. lutzomyia conviti is now added to the 229 species of lutzomyia already registered in brazil and to the 44 identified in s?o gabriel da cachoeira, amazonas state. both sexes of l. conviti were collected in 2007 and 2008 with cdc light traps in an environment of primary vegetation represented by firm land forest. the distribution range of the species is cited and discussed.
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