First insight into Mycobacterium tuberculosis genetic diversity in Paraguay

<p>Abstract</p> <p>Background</p> <p>We present a picture of the biodiversity of <it>Mycobacterium tuberculosis </it>in Paraguay, an inland South American country harboring 5 million inhabitants with a tuberculosis notification rate of 38/100,000.</p> <p>Results</p> <p>A total of 220 strains collected throughout the country in 2003 were classified by spoligotyping into 79 different patterns. Spoligopatterns of 173 strains matched 51 shared international types (SITs) already present in an updated version of SpolDB4, the global spoligotype database at Pasteur Institute, Guadeloupe. Our study contributed to the database 13 new SITs and 15 orphan spoligopatterns. Frequencies of major <it>M. tuberculosis </it>spoligotype lineages in our sample were as follows: Latin-American & Mediterranean (LAM) 52.3%, Haarlem 18.2%, S clade 9.5%, T superfamily 8.6%, X clade 0.9% and Beijing clade 0.5%. Concordant clustering by IS<it>6110 </it>restriction fragment length polymorphism (RFLP) and spoligotyping identified transmission in specific settings such as the Tacumbu jail in Asuncion and aboriginal communities in the Chaco. LAM genotypes were ubiquitous and predominated among both RFLP clusters and new patterns, suggesting ongoing transmission and adaptative evolution in Paraguay. We describe a new and successfully evolving clone of the Haarlem 3 sub-lineage, SIT2643, which is thus far restricted to Paraguay. We confirmed its clonality by RFLP and mycobacterial interspersed repetitive unit (MIRU) typing; we named it "Tacumbu" after the jail where it was found to be spreading. One-fifth of the spoligopatterns in our study are rarely or never seen outside Paraguay and one-tenth do not fit within any of the major phylogenetic clades in SpolDB4.</p> <p>Conclusion</p> <p>Lineages currently thriving in Paraguay may reflect local host-pathogen adaptation of strains introduced during past migrations from Europe.</p

Glycoprotein Ib activation by thrombin stimulates the energy metabolism in human platelets

<div><p>Thrombin-induced platelet activation requires substantial amounts of ATP. However, the specific contribution of each ATP-generating pathway <i>i</i>.<i>e</i>., oxidative phosphorylation (OxPhos) versus glycolysis and the biochemical mechanisms involved in the thrombin-induced activation of energy metabolism remain unclear. Here we report an integral analysis on the role of both energy pathways in human platelets activated by several agonists, and the signal transducing mechanisms associated with such activation. We found that thrombin, Trap-6, arachidonic acid, collagen, A23187, epinephrine and ADP significantly increased glycolytic flux (3–38 times <i>vs</i>. non-activated platelets) whereas ristocetin was ineffective. OxPhos (33 times) and mitochondrial transmembrane potential (88%) were increased only by thrombin. OxPhos was the main source of ATP in thrombin-activated platelets, whereas in platelets activated by any of the other agonists, glycolysis was the principal ATP supplier. In order to establish the biochemical mechanisms involved in the thrombin-induced OxPhos activation in platelets, several signaling pathways associated with mitochondrial activation were analyzed. Wortmannin and LY294002 (PI3K/Akt pathway inhibitors), ristocetin and heparin (GPIb inhibitors) as well as resveratrol, ATP (calcium-release inhibitors) and PP1 (Tyr-phosphorylation inhibitor) prevented the thrombin-induced platelet activation. These results suggest that thrombin activates OxPhos and glycolysis through GPIb-dependent signaling involving PI3K and Akt activation, calcium mobilization and protein phosphorylation.</p></div

First insight into Mycobacterium tuberculosis genetic diversity in Paraguay

Background: We present a picture of the biodiversity of Mycobacterium tuberculosis in Paraguay, an inland South American country harboring 5 million inhabitants with a tuberculosis notification rate of 38/100,000. Results: A total of 220 strains collected throughout the country in 2003 were classified by spoligotyping into 79 different patterns. Spoligopatterns of 173 strains matched 51 shared international types (SITs) already present in an updated version of SpoIDB4, the global spoligotype database at Pasteur Institute, Guadeloupe. Our study contributed to the database 13 new SITs and 15 orphan spoligopatterns. Frequencies of major M. tuberculosis spoligotype lineages in our sample were as follows: Latin-American & Mediterranean (LAM) 52.3%, Haarlem 18.2%, S clade 9.5%, T superfamily 8.6%, X clade 0.9% and Beijing clade 0.5%. Concordant clustering by IS6110 restriction fragment length polymorphism (RFLP) and spoligotyping identified transmission in specific settings such as the Tacumbu jail in Asuncion and aboriginal communities in the Chaco. LAM genotypes were ubiquitous and predominated among both RFLP clusters and new patterns, suggesting ongoing transmission and adaptative evolution in Paraguay. We describe a new and successfully evolving clone of the Haarlem 3 sub-lineage, SIT2643, which is thus far restricted to Paraguay. We confirmed its clonality by RFLP and mycobacterial interspersed repetitive unit (MIRU) typing; we named it "Tacumbu" after the jail where it was found to be spreading. One-fifth of the spoligopatterns in our study are rarely or never seen outside Paraguay and one-tenth do not fit within any of the major phylogenetic clades in SpoIDB4. Conclusion: Lineages currently thriving in Paraguay may reflect local host-pathogen adaptation of strains introduced during past migrations from Europe.Fil: Candia, Norma. Universidad Nacional de Asunción. Departamento de Biología Molecular; Paraguay.Fil: López, Beatriz. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Departamento de Biología Molecular; Argentina.Fil: Zozio, Thierry. Institut Pasteur de Guadeloupe. Unité de la Tuberculose et des Mycobacteries; Francia.Fil: Carrivale, Marcela.ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Departamento de Biología Molecular; Argentina.Fil: Diaz, Chyntia. Universidad Nacional de Asunción. Departamento de Biología Molecular; Paraguay.Fil: Russomando, Graciela. Universidad Nacional de Asunción. Departamento de Biología Molecular; Paraguay.Fil: de Romero, Nilda J. Laboratorio Central de Salud Pública; Paraguay.Fil: Jara, Juan C. Programa Nacional de Control de la Tuberculosis; Paraguay.Fil: Barrera, Lucía. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Departamento de Biología Molecular; Argentina.Fil: Rastogi, Nalin. Institut Pasteur de Guadeloupe. Unité de la Tuberculose et des Mycobacteries; Francia.Fil: Ritacco, Viviana. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Departamento de Biología Molecular; Argentina

First insight into Mycobacterium tuberculosis genetic diversity in Paraguay

Background: We present a picture of the biodiversity of Mycobacterium tuberculosis in Paraguay, an inland South American country harboring 5 million inhabitants with a tuberculosis notification rate of 38/100,000. Results: A total of 220 strains collected throughout the country in 2003 were classified by spoligotyping into 79 different patterns. Spoligopatterns of 173 strains matched 51 shared international types (SITs) already present in an updated version of SpoIDB4, the global spoligotype database at Pasteur Institute, Guadeloupe. Our study contributed to the database 13 new SITs and 15 orphan spoligopatterns. Frequencies of major M. tuberculosis spoligotype lineages in our sample were as follows: Latin-American & Mediterranean (LAM) 52.3%, Haarlem 18.2%, S clade 9.5%, T superfamily 8.6%, X clade 0.9% and Beijing clade 0.5%. Concordant clustering by IS6110 restriction fragment length polymorphism (RFLP) and spoligotyping identified transmission in specific settings such as the Tacumbu jail in Asuncion and aboriginal communities in the Chaco. LAM genotypes were ubiquitous and predominated among both RFLP clusters and new patterns, suggesting ongoing transmission and adaptative evolution in Paraguay. We describe a new and successfully evolving clone of the Haarlem 3 sub-lineage, SIT2643, which is thus far restricted to Paraguay. We confirmed its clonality by RFLP and mycobacterial interspersed repetitive unit (MIRU) typing; we named it "Tacumbu" after the jail where it was found to be spreading. One-fifth of the spoligopatterns in our study are rarely or never seen outside Paraguay and one-tenth do not fit within any of the major phylogenetic clades in SpoIDB4. Conclusion: Lineages currently thriving in Paraguay may reflect local host-pathogen adaptation of strains introduced during past migrations from Europe.Fil: Candia, Norma. Universidad Nacional de Asunción. Departamento de Biología Molecular; Paraguay.Fil: López, Beatriz. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Departamento de Biología Molecular; Argentina.Fil: Zozio, Thierry. Institut Pasteur de Guadeloupe. Unité de la Tuberculose et des Mycobacteries; Francia.Fil: Carrivale, Marcela.ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Departamento de Biología Molecular; Argentina.Fil: Diaz, Chyntia. Universidad Nacional de Asunción. Departamento de Biología Molecular; Paraguay.Fil: Russomando, Graciela. Universidad Nacional de Asunción. Departamento de Biología Molecular; Paraguay.Fil: de Romero, Nilda J. Laboratorio Central de Salud Pública; Paraguay.Fil: Jara, Juan C. Programa Nacional de Control de la Tuberculosis; Paraguay.Fil: Barrera, Lucía. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Departamento de Biología Molecular; Argentina.Fil: Rastogi, Nalin. Institut Pasteur de Guadeloupe. Unité de la Tuberculose et des Mycobacteries; Francia.Fil: Ritacco, Viviana. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Departamento de Biología Molecular; Argentina

Sistema de evaluación institucional en enseñanza obligatoria en Iberoamérica

La presente aportación se focaliza, en este contexto, en la evaluación institucional externa (vinculada o no a la autoevaluación interna) y, por tanto, considera prioritariamente la manera como se evalúan los centros educativos como totalidad y no tanto alguno de sus aspectos (evaluación de la dirección, de los profesores, de los programas, etc.), que también pueden estar considerados. El énfasis también está en conocer la organización y desarrollo del sistema de evaluación. Recoge la visión de 43 especialistas de trece países iberoamericanos sobre las formas de entender y promover la evaluación institucional en sus centros educativos. Sus aportaciones, que deben contextualizarse en las particularidades educativas de sus países (ya presentadas en anteriores informes de la RedAGE), presentan los aspectos generales y normativos de la evaluación, las formas cómo se organiza, los efectos institucionales que tienen y algunas reflexiones, retos y propuestas para la mejora. Su orientación es claramente práctica y se vincula al encuentro anual que la RedAGE realizado los días 16 y 17 de mayo de 2016 en la ciudad de Leiria (Portugal). Allí, los representantes de las organizaciones miembro seleccionaron la temática por su interés actual (con clara vinculación a la mejora de los sistemas educativos y la acreditación institucional), consensuaron la estructura de las aportaciones y realizaron un intercambio de posibles ideas sobre la temática. Se cubre así y como en ocasiones anteriores el propósito fundamental de la RedAGE, como es el de fomentar el intercambio de experiencias, la promoción del conocimiento sobre administración y gestión educativa y la reflexión sobre la práctica de la gestión. La finalidad última sigue siendo la de mejorar el funcionamiento de los centros educativos (y, a través de ellos, de los sistemas educativos), procurando sean de calidad y un instrumento para el cambio profesional y social

Encargo de traducción: “Blood Collection: A Short Course”

Treball final de Màster Universitari en Traducció Medicosanitària. Codi: SBA031. Curs acadèmic 2015-201

Exploring the "Latin American Mediterranean" family and the RDRio lineage in Mycobacterium tuberculosis isolates from Paraguay, Argentina and Venezuela

Submitted by Sandra Infurna ([email protected]) on 2020-03-28T17:15:58Z No. of bitstreams: 1 HarrrisonGomes_SidraVasconcelos_etal_IOC_2019.pd.pdf: 1746618 bytes, checksum: 5564ed65983e850073abda10c0053dea (MD5)Approved for entry into archive by Sandra Infurna ([email protected]) on 2020-03-28T17:43:14Z (GMT) No. of bitstreams: 1 HarrrisonGomes_SidraVasconcelos_etal_IOC_2019.pd.pdf: 1746618 bytes, checksum: 5564ed65983e850073abda10c0053dea (MD5)Made available in DSpace on 2020-03-28T17:43:14Z (GMT). No. of bitstreams: 1 HarrrisonGomes_SidraVasconcelos_etal_IOC_2019.pd.pdf: 1746618 bytes, checksum: 5564ed65983e850073abda10c0053dea (MD5) Previous issue date: 2019Universidad Nacional de Asunción. Instituto de Investigaciones en Ciencias de la Salud. Departamento de Biología Molecular y Biotecnología. Asunción, Paraguay / Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Molecular aplicada às Micobactérias. Rio de Janeiro, RJ, Brasil.Universidad Nacional de Asunción. Instituto de Investigaciones en Ciencias de la Salud. Departamento de Biología Molecular y Biotecnología. Asunción, Paraguay.Universidad Nacional de Asunción. Instituto de Investigaciones en Ciencias de la Salud. Departamento de Biología Molecular y Biotecnología. Asunción, Paraguay.Instituto Nacional de Enfermedades Infecciosas, ANLIS “Carlos G. Malbran”. Servicio de Micobacterias. Buenos Aires. Argentina.Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Molecular aplicada às Micobactérias. Rio de Janeiro, RJ, Brasil..Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Microbiologia Celular, Rio de Janeiro, RJ, Brasil.Laboratorio Central de Salud Pública, MSP y BS. Asunción, Paraguay.Instituto Nacional de Enfermedades Respiratorias Emilio Coni. Buenos Aires, Argentina.Instituto de Biomedicina. Laboratorio de Tuberculosis. Caracas, Venezuela / Universidad de Las Américas Facultad de Ciencias de la Salud. One Health Research Group. Quito, Ecuador.Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Molecular aplicada às Micobactérias. Rio de Janeiro, RJ, Brasil.Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Molecular aplicada às Micobactérias. Rio de Janeiro, RJ, Brasil.The Latin American & Mediterranean (LAM) spoligotype family is one of the most successful genotype of Mycobacterium tuberculosis worldwide and particularly prevalent in South-America. Within this family, a sublineage named Region of Difference Rio (RDRio) was reported initially in Brazil and is characterized by a genomic deletion of about 26.3 kb. This lineage seems to show a specific adaptation to the Euro-Latin American population. In this context, we sought to evaluate the LAM family and the presence of the RDRio genotype in samples from three Latin American countries including Paraguay, Venezuela and Argentina. To detect LAM strains reliably we applied a typing scheme using spoligotyping, 12 loci MIRU-VNTR, the Ag85C103 SNP and the regions of difference RDRio and RD174. IS6110-RFLP results were also used when available

Mycobacterium tuberculosis strains of the Beijing genotype are rarely observed in tuberculosis patients in South America

The frequency of the Beijing genotype of Mycobacterium tuberculosis as a cause of tuberculosis (TB) in South America was determined by analyzing genotypes of strains isolated from patients that had been diagnosed with the disease between 1997 and 2003 in seven countries of the subcontinent. In total, 19 of the 1,202 (1.6%) TB cases carried Beijing isolates, including 11 of the 185 patients from Peru (5.9%), five of the 512 patients from Argentina (1.0%), two of the 252 Brazilian cases (0.8%), one of the 166 patients from Paraguay (0.6%) and none of the samples obtained from Chile (35), Colombia (36) and Ecuador (16). Except for two patients that were East Asian immigrants, all cases with Beijing strains were native South Americans. No association was found between carrying a strain with the Beijing genotype and having drug or multi-drug resistant disease. Our data show that presently transmission of M. tuberculosis strains of the Beijing genotype is not frequent in Latin America. In addition, the lack of association of drug resistant TB and infection with M. tuberculosis of the Beijing genotype observed presently demands efforts to define better the contribution of the virulence and lack of response to treatment to the growing spread of Beijing strains observed in other parts of the world