oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Relación entre anticuerpos contra Chlamydia y enfermedad inflamatoria pelviana  [cached]
Revista Panamericana de Salud Pública , 1997,
Abstract:
Seroprevalencia de Chlamydia pneumoniae en una población pediátrica de Costa Rica
Somogyi,Teresita; Alfaro,Wilber;
Revista Médica del Hospital Nacional de Ni?os Dr. Carlos Sáenz Herrera , 1999,
Abstract: se determinó la presencia de anticuerpos (iga) contra chlamydia pneumoniae y chlamydia trachomatis en el suero de 30 ni?os admitidos al hospital nacional de ni?os por infecciones en el tracto respiratorio con edades entre los 7 días y los 28 meses. se obtuvieron los siguientes resultados: 2/30 (6,6%) sueros fueron positivos para c. trachomatis y 8/30 sueros fueron positivos para c. pneumoniae (26.6%). es la primera vez que se establece la presencia de c. pneumoniae en costa rica. se discuten estos resultados en relación con los resultados de estudios por bacterias y virus, edad y diagnóstico de los pacientes.
Anticuerpos séricos contra la enfermedad de Newcastle e Influenza Aviar en aves rapaces de Chile.  [PDF]
Daniel González-Acu?a,álvaro Gaete,Lucila Moreno,Karen Ardiles
Revista MVZ Córdoba , 2012,
Abstract: Objetivo. Detectar la presencia de anticuerpos séricos sanguíneos contra los virus de la Enfermedad de Newcastle (ENC) e Influenza aviar (IA), para comprender la contribución de las aves silvestres en la transmisión de estos virus en Chile. Materiales y métodos. Se analizaron 63 aves pertenecientes a los órdenes Falconiformes y Strigiformes desde centros de rehabilitación de aves de las zonas central y sur de Chile. Se realizaron las pruebas de inhibición de la hemoaglutinación (IHA) para detectar anticuerpos contra el virus ENC e inmunodifusión en gel agar (IDGA) y ELISA para IA. Resultados. Se detectaron 14 aves positivas (22.2%) para anticuerpos séricos contra el virus de la ENC. En cambio, no se registraron anticuerpos séricos sanguíneos para el virus de la IA. Conclusiones. La presencia de aves rapaces positivas en los centros de rescate a los anticuerpos séricos contra el virus de la ENC puede ser explicada por el consumo de carne de pollos que han sido vacunados contra ENC o consumo de aves que han adquirido directamente el virus vacunal a través de los distintos procedimientos de administración (aerosoles, bebederos) de la vacuna o por el ingreso a los centros de rescate de aves rapaces migratorias, las que podrían facilitar la diseminación de la infección desde los países de origen, hecho que debe ser investigado.
An immunoenzymatic test for IgG antibody levels against 10 serotypes of Streptococcus pneumoniae Estandarización en Colombia de una prueba ELISA para la evaluación de los niveles séricos de anticuerpos IgG contra diez serotipos de Streptococcus pneumoniae  [cached]
Lucía Carolina Leal-Esteban,Jessica Lineth Rojas,Andrea Lizeth Jaimes,Juan David Montoya
Biomédica , 2011,
Abstract: Introduction. Streptococcus pneumoniae is a major cause of morbi-mortality in early childhood and elderly. However, a test to measure the antibody responses after specific vaccination is not available in Colombia. Objective. An immunoenzymatic test was standardized for the measurement of serum IgG levels against 10 serotypes of S. pneumoniae in response to the specific vaccination. Material and methods. Capsular polysaccharides 1, 3, 4, 5, 6B, 9V, 14, 18, 19F, 23F of S. pneumoniae were used as antigens in a solid-phase ELISA. These responses were characterized in a randomized selected healthy individuals from a Colombian population. Results. The reference and control sera showed great reactivity against all the polysaccharides evaluated, especially against polysaccharide 14 and 19F. The lowest reactivity in these two sera was observed against polysaccharide 3 and 4. Among the children evaluated, polysaccharide 5/19F showed the highes pre-vaccination reactivity, and polysaccharide 14/19F showed the highest post-vaccination reactivity. Among the adults, polysaccharides 14 and 19F showed the greatest reactivity pre- and postvaccination. For all the polysaccharides (excepting polysaccharide 5), an inverse association among high polysaccharide-specific pre-vaccination- and the increase of post-vaccination-IgG levels was observed. Conclusion. This ELISA test reliably quantifies the serum levels of specific IgG against 10 serotypes of S. pneumoniae. According to the responses by healthy individuals, the current study validates parameters used internationally as an adequate the response to the 23-valent pneumococcal vaccine. Introducción. Streptococcus pneumoniae es causante de gran morbimortalidad en ni os peque os y ancianos. Sin embargo, en Colombia no está disponible una prueba que evalúe la respuesta humoral a la vacunación específica contra este microorganismo. Objetivo. Estandarizar en Colombia un ensayo inmunoenzimático para evaluar los niveles séricos de anticuerpos IgG contra diez serotipos de S. pneumoniae en respuesta a la vacunación específica y caracterizar esta respuesta en individuos sanos de nuestra población. Materiales y métodos. Se hizo un ELISA en fase sólida utilizando como antígenos los polisacáridos capsulares 1, 3, 4, 5, 6B, 9V, 14, 18, 19F y 23F de S. pneumoniae. Resultados. Los sueros de referencia y control reaccionaron fuertemente contra los polisacáridos evaluados, especialmente contra 14 y 19F. En los cinco ni os sanos evaluados, los polisacáridos 5 y 19F presentaron los mayores títulos antes de la vacunación. Antes de la vacunaci
A PROPóSITO DE LA ETIOLOGíA BACTERIANA DE EPOC Y ASMA. INFECCIóN POR Chlamydia pneumoniae Y ENFERMEDAD PULMONAR CRóNICA: RELACIóN CAUSAL O EPIFENóMENO? A PROPóSITO DA ETIOLOGíA BACTERIANA DE EPOC E ASMA. INFEC O POR Chlamydia pneumoniae E DOEN A PULMONAR CR NICA: RELA O CAUSAL Ou EPIFENóMENO? IN REFERENCE TO THE BACTERIOLOGIC ETHIOLOGY OF COPD AND ASTHMA: Chlamydia pneumoniae INFECTION AND CHRONIC LUNG DISEASE: CAUSATIVE RELATIONSHIP OR EPIPHENOMENUM?
LUIS EDUARDO PINO,GUSTAVO HINCAPIé
Revista Med , 2008,
Abstract: Chlamydia pneumoniae es una bacteria intracelular involucrada en el desarrollo de infecciones respiratorias agudas y en la fisiopatología de enfermedades pulmonares crónicas, concretamente en la enfermedad pulmonar obstructiva crónica y en el asma del adulto, entidades en cuyas exacerbaciones también parece estar implicada. En la actualidad se esgrimen diversas hipótesis para explicar la relación entre la infección respiratoria por Chlamydia pneumoniae y las patologías pulmonares crónicas, pero existe controversia acerca de si simplemente se trata de un epifenómeno. A continuación se describen los principales hallazgos que sugieren el papel etiológico de la infección por esta bacteria en la enfermedad pulmonar crónica y aunque no se conocen estudios sobre este tema en Colombia, se auguran futuras líneas de investigación al respecto. Chlamydia pneumoniae é uma bactéria intracelular associada no desenvolvimento de infec es respiratórias agudas e na fisiopatologia de doen as pulmonares cr nicas, concretamente na doen a pulmonar obstructiva cr nica e no asma do adulto, entidades em cujas exacerba es também parece estar implicada. Na atualidade se esgrimem diversas hipóteses para explicar a rela o entre a infec o respiratória por Chlamydia pneumoniae e as patologias pulmonares cr nicas, mas existe controvérsia a respeito de se simplesmente trata-se de um epifen meno. A seguir se descrevem os principais achados que sugerem o papel etiológico da infec o por esta bactéria na doen a pulmonar cr nica e ainda que n o se conhe am estudos sobre este tema em Col mbia, auguram-se futuras linhas de investiga o ao respeito. Chlamydia pneumoniae is an intracellular bacteria involved in the development of acute respiratory infections and in the physiopathology of chronic lung illnesses, specifically in COPD and adult asthma where it seems to play a role in their exacerbations. At the present time, there are diverse hypothesis being proposed to explain the relationship between the respiratory infections due to Chlamydia pneumoniae and chronic lung diseases but there is controversy as to whether this is simply an epiphenomenon. Here we describe the principal observations, which strongly suggest the etiologic role of this bacterial infection in the genesis of chronic obstructive lung diseases. Although we don't know about any trials on this topic in our country, its importance ensures future investigation on this field.
Chlamydia pneumoniae and Heart Desease
Tatjana Grdanoska
Macedonian Journal of Medical Sciences , 2008,
Abstract: The aim of this paper is to review the current data concerning the associations between Chlamydia pneumoniae and heart disease. Chlamydiae have been placed in their own order, Chlamydiales, with one family, Chlamydiaceae, and a single genus Chlamydia. Molecular evaluation of rRNA sequences confirms that chlamydiae are eubacteria with very distant relationships to other eubacterial orders. The genus Chlamydia consists of four major species, Chlamydia trachomatis, C. psitacci, C. pneumoniae. and C. pecorum. These microorganisms are obligate parasites that replicate in vacuole in the cytoplasm of eukaryotic cells. Chlamydia spp. cause a variety of diseases and are mostly prevalent pathogens causing sexually transmited diseases. Since the known Chlamydia spp. are obligate intracellular parasites, pure cultures are not available for studying of many of their biochemical properties. Molecular sequence provides a comprehensive outline of the phylogenetic organization of the Chlamydiae. Chlamydiae are known to cause various heart diseases. Endo-, myo- and pericarditis were associated with chlamydial infections during the first epidemics of psittacosis due to Chlamydia psittaci. The most common Chlamydia of humans, C. pneumoniae has also been incriminated in these diseases. Recently, greatest attention has been afforded to the association of C. pneumoniae with atherosclerosis and coronary heart disease (CHD).
A PROPóSITO DE LA ETIOLOGíA BACTERIANA DE EPOC Y ASMA. INFECCIóN POR Chlamydia pneumoniae Y ENFERMEDAD PULMONAR CRóNICA: ?RELACIóN CAUSAL O EPIFENóMENO?
PINO,LUIS EDUARDO; HINCAPIé,GUSTAVO;
Revista Med , 2008,
Abstract: chlamydia pneumoniae is an intracellular bacteria involved in the development of acute respiratory infections and in the physiopathology of chronic lung illnesses, specifically in copd and adult asthma where it seems to play a role in their exacerbations. at the present time, there are diverse hypothesis being proposed to explain the relationship between the respiratory infections due to chlamydia pneumoniae and chronic lung diseases but there is controversy as to whether this is simply an epiphenomenon. here we describe the principal observations, which strongly suggest the etiologic role of this bacterial infection in the genesis of chronic obstructive lung diseases. although we don't know about any trials on this topic in our country, its importance ensures future investigation on this field.
Determinación de anticuerpos contra Chlamydia trachomatis en pacientes del Servicio de Infertilidad del Centro Médico ?Dr. Rafael Guerra Méndez?, Valencia, Venezuela
Alfieri,Ana; Ramírez,Luis Guillermo; Arcila,Noemí; Guevara,Yelitza;
Revista de la Sociedad Venezolana de Microbiología , 2005,
Abstract: abstract chlamydia trachomatis, is an intracellular bacteria that affects macrophages and epithelial cells, multiplying in their interior. it attacks both sexes and it can produce an alteration of the reproductive tract, for what is an important human and animal pathogen. however, the methods for chlamydia diagnosis are even inadequate. in the present study, antibodies against chlamydia were identified by "immunocomb bivalent chlamydia" technique, in 34 serum samples of infection suspicious patients' (23 female patients, 11 male patients), that attended at the infertility service (embriogen). 9 patients were positive (26.4%) [8 feminine patients (88.8%) and 1 masculine patient (11.1%)] of the studied samples. in conclusion, the detection of specific ig g antibodies facilitates the diagnosis of chlamydia infections, because is fast, sensitive and specific.
The transcriptional landscape of Chlamydia pneumoniae
Marco Albrecht, Cynthia M Sharma, Marcus T Dittrich, Tobias Müller, Richard Reinhardt, J?rg Vogel, Thomas Rudel
Genome Biology , 2011, DOI: 10.1186/gb-2011-12-10-r98
Abstract: Using a differential RNA-sequencing approach with specific enrichment of primary transcripts, we defined the transcriptome of purified elementary bodies and reticulate bodies of C. pneumoniae strain CWL-029; 565 transcriptional start sites of annotated genes and novel transcripts were mapped. Analysis of adjacent genes for co-transcription revealed 246 polycistronic transcripts. In total, a distinct transcription start site or an affiliation to an operon could be assigned to 862 out of 1,074 annotated protein coding genes. Semi-quantitative analysis of mapped cDNA reads revealed significant differences for 288 genes in the RNA levels of genes isolated from elementary bodies and reticulate bodies. We have identified and in part confirmed 75 novel putative non-coding RNAs. The detailed map of transcription start sites at single nucleotide resolution allowed for the first time a comprehensive and saturating analysis of promoter consensus sequences in Chlamydia.The precise transcriptional landscape as a complement to the genome sequence will provide new insights into the organization, control and function of genes. Novel non-coding RNAs and identified common promoter motifs will help to understand gene regulation of this important human pathogen.The human pathogen Chlamydia pneumoniae (Cpn; also referred to as Chlamydophila pneumoniae [1]) is a major cause of pneumonia and chronic infection has also been associated with atherosclerosis [2] and Alzheimer's disease [3]. Cpn can cause a spectrum of infections that usually take a mild or sub-clinical course. It causes acute respiratory disease [4] and accounts for 6 to 20% of community-acquired pneumonia cases in adults [5]. Almost all humans can expect to be infected with Cpn at least once during their lifetime and infections can become chronic. Re-infections during the lifetime are common, leading to a seroprevalence of 80% in adults [6]. Cpn is an obligate intracellular Gram-negative bacteria with a unique biphasic devel
Estandarización en Colombia de una prueba ELISA para la evaluación de los niveles séricos de anticuerpos IgG contra diez serotipos de Streptococcus pneumoniae
Leal-Esteban,Lucía Carolina; Rojas,Jessica Lineth; Jaimes,Andrea Lizeth; Montoya,Juan David; Montoya,Nilton Edu; Leiva,Lily; Trujillo-Vargas,Claudia Milena;
Biomédica , 2012,
Abstract: introduction. streptococcus pneumoniae is a major cause of morbi-mortality in early childhood and elderly. however, a test to measure the antibody responses after specific vaccination is not available in colombia. objective. an immunoenzymatic test was standardized for the measurement of serum igg levels against 10 serotypes of s. pneumoniae in response to the specific vaccination. material and methods. capsular polysaccharides 1, 3, 4, 5, 6b, 9v, 14, 18, 19f, 23f of s. pneumoniae were used as antigens in a solid-phase elisa. these responses were characterized in a randomized selected healthy individuals from a colombian population. results. the reference and control sera showed great reactivity against all the polysaccharides evaluated, especially against polysaccharide 14 and 19f. the lowest reactivity in these two sera was observed against polysaccharide 3 and 4. among the children evaluated, polysaccharide 5/19f showed the highes pre-vaccination reactivity, and polysaccharide 14/19f showed the highest post-vaccination reactivity. among the adults, polysaccharides 14 and 19f showed the greatest reactivity pre- and post-vaccination. for all the polysaccharides (excepting polysaccharide 5), an inverse association among high polysaccharide-specific pre-vaccination- and the increase of post-vaccination-igg levels was observed. conclusion. this elisa test reliably quantifies the serum levels of specific igg against 10 serotypes of s. pneumoniae. according to the responses by healthy individuals, the current study validates parameters used internationally as an adequate the response to the 23-valent pneumococcal vaccine.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.