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1.
Rev. otorrinolaringol. cir. cabeza cuello ; 77(2): 204-206, jun. 2017. ilus
Artigo em Espanhol | LILACS | ID: biblio-902764

RESUMO

El linfoma T/NK extraganglionar tipo nasal es un linfoma extraganglionar, habitualmente expresa el fenotipo NK y VEB positivo. Cursa ocasionando necrosis y angioinvasión afectando de manera preferente estructuras mediofaciales. Característicamente es muy agresivo. Presentamos un caso con una sobrevida de siete meses a partir de los primeros síntomas y realizamos revisión de la literatura.


Extranodal NK/T-cell lymphoma nasal type, is an extranodal lymphoma, usually with an NK-cell phenotype and EBV possitive. It causes necrosis and angioinvasion, and it is most commonly presenting in the midfacial area. Characteristically it is very aggressive. A case with survival of seven months from the first symptoms is reported and a review of the literature is made.


Assuntos
Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Nasais/patologia , Linfoma Extranodal de Células T-NK/patologia , Neoplasias Nasais/diagnóstico por imagem , Evolução Fatal , Infecções por Vírus Epstein-Barr/complicações , Linfoma Extranodal de Células T-NK/diagnóstico por imagem
2.
Rev. Soc. Bras. Med. Trop ; 50(3): 315-320, May-June 2017. tab
Artigo em Inglês | LILACS | ID: biblio-896964

RESUMO

Abstract INTRODUCTION: Pseudomonas aeruginosa is one of the most common nosocomial pathogens. The emergence of extended spectrum β-lactamases (ESBLs) has been increasingly reported as a major clinical concern worldwide. The main aim of the present study was to determine the distribution of bla OXA, bla PER-1, bla VEB-1, and bla GES-1 genes among ESBL-producing P. aeruginosa isolated from two distinct provinces in Iran. METHODS: In this study, a total of 75 (27.5%) ESBL-producing isolates were identified from 273 P. aeruginosa isolates collected from patients in Qazvin and Tehran. Phenotypic detection of ESBLs and antimicrobial susceptibility testing were performed according to the Clinical and Laboratory Standards Institute guidelines. PCR and sequencing were employed to detect bla OXA-1, bla OXA, bla GES-1, bla PER-1, and bla VEB-1 genes. Isolate genetic relationships were evaluated by repetitive extragenic palindromic sequence-based PCR (REP-PCR). RESULTS: In total, 59 (78.7%) of the ESBL-producing isolates showed multidrug resistance. The highest rates of susceptibility were observed against colistin (75 isolates, 100%) and polymyxin B (75, 100%) followed by amikacin (44, 58.7%), and piperacillin-tazobactam (40, 53.3%). The bla OXA-1 (37.3%) gene was the most common of the genes investigated, followed by bla OXA-4 (32%), bla GES-1 (16%), and bla VEB-1 (13.3%). REP-PCR identified three different genotypes: types A (89.3%), B (6.7%), and C (4%). CONCLUSIONS: We found a significant presence of bla OXA-1, bla OXA-4, bla GES-1, and bla VEB-1 genes among P. aeruginosa isolates, highlighting the need for suitable infection control strategies to effectively treat patients and prevent the further distribution of these resistant organisms.


Assuntos
Humanos , Masculino , Feminino , Pseudomonas aeruginosa/genética , beta-Lactamases/genética , Farmacorresistência Bacteriana Múltipla/genética , Antibacterianos/farmacologia , Pseudomonas aeruginosa/efeitos dos fármacos , Pseudomonas aeruginosa/enzimologia , Testes de Sensibilidade Microbiana , Reação em Cadeia da Polimerase , Proteínas de Escherichia coli/genética , Genes Bacterianos , Genótipo , Irã (Geográfico)
3.
Acta odontol. venez ; 52(1)2014. ilus
Artigo em Espanhol | LILACS | ID: lil-777810

RESUMO

Se presenta caso clínico de paciente con lesiones blanquecinas en bordes laterales de lengua de 1 año de evolución aproximadamente; clínicamente asintomático, sin hábitos tóxicos ni antecedentes médicos de importancia. Actualmente bajo tratamiento ortodóntico, en donde el especialista lo alerta sobre la importancia de interconsultar con el Patólogo Bucal. Luego de una exhaustiva historia clínica, se toma muestra de la lesión y el examen histopatológico arrojó: hiperplasia epitelial exofítica, paraqueratosis excesiva y células superficiales en forma de globo con típica fragmentación nuclear, indicativo de inclusión viral (Cuerpos de Cowdry). Con estos hallazgos, la correlación con las características clínicas de la lesión y los exámenes serológicos (positivo para VIH), se llega a un diagnóstico conclusivo de Leucoplasia Pilosa Bucal (LPB). Se remitió el paciente al Instituto Anzoatiguense de la Salud (SALUDANZ), entidad encargada de problemas de Salud Pública en el Edo. Anzoátegui. La Leucoplasia Pilosa Bucal (LPB) se presenta comúnmente en pacientes VIH+ y representa un factor informativo y predictivo para el odontólogo, estomatólogo y cualquier especialista de la rama de la salud, en cuanto al tratamiento, diagnóstico y pronóstico bucal y sistémico del paciente.


We report the clinical case of a patient with whitish lesions on lateral tongue edges with 1 year of evolution approximately, clinically asymptomatic, without toxic habits or important medical history. The patient was in orthodontic treatment, when the specialist warns the importance of Bucal Pathologist review. After a thorough medical history, biopsy was taken and histopathological examination showed: exophytic epithelial hyperplasia, excessive parakeratosis and superficial balloon cells with typical nuclear fragmentation, indicative of viral inclusion (Cowdry Body´s). With these findings and correlation with lesion clinical features and serological tests (HIV positive), the final diagnosis was Bucal Hairy leukoplakia (OHL). The patient was referred Anzoatiguense Health Institute (Saludanz), entity responsible of public health problems in the Anzoátegui State, Venezuela. The Bucal Hairy Leukoplakia (OHL) occurs commonly in HIV patients and represents an informative and predictive factor for the dentist, stomatologist and any health branch specialist for treatment, diagnosis and prognosis of the patient.


Assuntos
Humanos , Masculino , Adulto , Doenças da Boca/complicações , Doenças da Boca/etiologia , Leucoplasia Oral/patologia , Síndrome da Imunodeficiência Adquirida/patologia , Carcinoma de Células Escamosas , Medicina Bucal , Patologia Bucal
4.
Medicina (B.Aires) ; 71(6): 536-541, dic. 2011. ilus, tab
Artigo em Espanhol | LILACS | ID: lil-633914

RESUMO

Los pacientes con infección por el virus de inmunodeficiencia humana (HIV) tienen 200 veces más riesgo de desarrollar un linfoma no Hodgkin (LNH) con respecto a la población general. El linfoma plasmoblástico (LP) representa menos del 3% de todos los LNH asociados con el HIV. El objetivo de este estudio es informar las características clínico-patológicas de 5 pacientes con enfermedad HIV/sida y LP del tracto gastrointestinal. Se revisaron de forma retrospectiva los casos de LP del tracto gastrointestinal diagnosticados en el Instituto Nacional de Cancerología de la Ciudad de México en el periodo comprendido entre los años 2000 al 2009. Se analizaron las características clínico-patológicas y se realizaron cortes de bloques de tejidos embebidos en parafina para reacciones de inmunohistoquímica. La presencia del virus de Epstein Barr (VEB) se examinó por reacción en cadena de la polimerasa (PCR) in situ. De los cinco pacientes, cuatro fueron hombres y una mujer, con una mediana de edad de 29 años. Tres tumores se localizaron en la región anorrectal, uno en colon ascendente y el restante en el estómago. Histológicamente, todos los tumores se caracterizaron por una proliferación difusa de células grandes de aspecto plasmoblástico. Las células neoplásicas fueron CD 138/MUM-1 positivas y CD 20 / PAX-5 negativas. En cuatro pacientes se detectó el genoma del VEB en las células neoplásicas mediante PCR in situ. La mediana de seguimiento fue 18 meses; tres pacientes estaban vivos con enfermedad y dos sobreviven sin evidencias de la neoplasia. El diagnóstico precoz de LP como una entidad clínico-patológica es importante para establecer el tratamiento correcto y mejorar el pronóstico de estos pacientes.


The risk of developing non-Hodgkin lymphoma (NHL) is 200 times higher in HIV-positive patients than otherwise healthy persons. Plasmablastic lymphoma (PL) represents < 3% of all NHL associated with HIV infection. The aim of this study was to review the clinical-pathologic features of PL of the gastrointestinal tract in 5 patients with HIV/aids disease. We performed a retrospective study of PL of the gastrointestinal tract diagnosed at the National Institute of Cancer at Mexico City, from 2000 to 2009. Clinical and pathological information was obtained and immunohistochemical studies were performed in paraffin-embedded tissue sections. The presence of Epstein-Barr Virus (EBV) was examined by in situ polymerase chain reaction (PCR). Four male and 1 female were included with a median of age of 29 years. Three tumors involved the ano-rectal area, one tumor the ascendant colon and one tumor the stomach. All tumors were histologically characterized by a monotonous proliferation of large lymphoid cell with plasmablastic features. Tumor cells were CD 138 / MUM-1positive and CD 20 / PAX-5 negative in all cases. EVB genome was detected by in situ PCR in 4 cases. The median of follow-up was 18 months, and revealed that three patients are alive with neoplasm disease and two patients are still alive with no evidence of the neoplasm. Recognition of this entity by pathologists and clinicians is important in order to establish the correct diagnosis and the early treatment of these patients.


Assuntos
Adulto , Feminino , Humanos , Masculino , Adulto Jovem , Infecções por Vírus Epstein-Barr/complicações , Neoplasias Gastrointestinais/virologia , Linfoma Relacionado a AIDS/virologia , Linfoma Imunoblástico de Células Grandes/virologia , Neoplasias Gastrointestinais/patologia , Linfoma Relacionado a AIDS/patologia , Linfoma Imunoblástico de Células Grandes/patologia , Reação em Cadeia da Polimerase , Estudos Retrospectivos
5.
Medicina (B.Aires) ; 70(2): 151-158, Apr. 2010. tab
Artigo em Espanhol | LILACS | ID: lil-633735

RESUMO

Los linfomas no Hodgkin (LNH) constituyen la segunda neoplasia definitoria de Sida más frecuente. En el presente trabajo se evaluaron 48 casos de linfomas asociados con la enfermedad debida al virus de la inmunodeficiencia humana (HIV) diagnosticados en la División Histopatología del Instituto de Investigaciones Hematológicas de la Academia Nacional de Medicina. Se incluyeron en la investigación 5 mujeres y 43 hombres con una mediana de edad al momento del diagnóstico de la neoplasia de 37 años. La evaluación morfológica se realizó en cortes coloreados con hematoxilina-eosina, estudio inmunohistoquímico para la detección del virus de Epstein Barr (VEB) en 48/48 casos, y mediante sonda oligonucleotídica biotinilada para la detección del ADN del Herpes virus humano tipo-8 (HHV-8) en 14/14 linfomas plasmoblásticos (LP). Todos fueron linfomas de fenotipo B, con un curso clínico agresivo y enfermedad neoplásica avanzada al momento del diagnóstico. Se pudo demostrar la fuerte asociación del VEB con los linfomas asociados al sida, con frecuencias que variaron según el subtipo histológico: 16/21 (76%) para los linfomas difusos de grandes células; 1/3 casos (33%) de linfomas de Burkitt y 3/4 (75%) en los linfomas primarios del sistema nervioso central. Globalmente, el genoma del VEB se detectó en 20/28 (71%) de las muestras de biopsias de LNH de esta serie. La detección del HHV-8 resultó negativa en los 14 LP. Los linfomas de Hodgkin fueron más frecuentes en varones,18/20 (90%), con un curso clínico agresivo y franco predominio de los subtipos histológicos de peor pronóstico (90% de casos). En estas neoplasias también se comprobó una frecuente asociación patogénica con el VEB (90% de casos).


Non-Hodgkin lymphomas (NHL) of the B-cell type are the second most common neoplasm among patients with human immunodeficiency virus (HIV) infection and AIDS. Here, we evaluated 48 cases of AIDS-related lymphomas (ARL) diagnosed at the Histopathological Division of the Instituto de Investigaciones Hematológicas of the National Academy of Medicine. Five were females and 43 were males with a median of age of 37 years at the time of the diagnosis. Micrometer sections were prepared and stained with hematoxilin-eosin; immunohistochemical examination for the presence of Epstein-Barr virus (EBV) was carried out in 48/48 cases. Additionally, biotinilated oligonucleotides were used to determine the presence of DNA of the Human Herpes virus type-8 (HHV-8) in 14/14 biopsy smears corresponding to plasmablastic lymphomas (PL). All were fenotype B cell lymphomas with an aggressive course and advanced neoplasm disease at the time of diagnosis. Virological findings showed the strong association between EBV and AIDS-related NHL. According to the histopathological subtype, the EBV genome was detected in 16/21 (76%) diffuse large B cell lymphomas, 1/3 Burkitt lymphoma and 3/4 (75%) of primary central nervous system lymphomas. Globally, EBV genome was detected in 20/28 NHL of this series. Detection of HHV-8 was negative in all cases of PL. Hodgkin lymphoma were more frequent in males 18/20 (90%), with an aggressive clinical course and a significant predominance of the subtypes associated with worse prognosis (90% of cases). We detected a significant association between EBV and HL (90% of cases). We consider that all cases of AIDS related lymphomas should be assessed for the presence of EBV because its presence may play a role in the prognosis.


Assuntos
Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , DNA Viral/análise , /genética , Doença de Hodgkin/virologia , Linfoma Relacionado a AIDS/virologia , Linfoma não Hodgkin/virologia , Doença de Hodgkin/patologia , Imuno-Histoquímica , Hibridização In Situ , Linfoma Relacionado a AIDS/classificação , Linfoma Relacionado a AIDS/patologia , Linfoma não Hodgkin/patologia , Fatores de Risco
6.
Chinese Journal of Microbiology and Immunology ; (12): 956-958, 2010.
Artigo em Chinês | WPRIM | ID: wpr-383082

RESUMO

Objective To establish a new method, applying high resolution melt, to discriminate the VEB-3 hypotype from the clinical gram negative isolates. Methods From January to December 2003,292 consecutive and non-repetitive gram-negative bacteria producing VEB extended spectrum β-lactamase (ESBL) were collected. Extract the DNA of clinical gram negative isolates with phenol-chloroform. PCR was performed to amplify the VEB gene with the DNA being template. After that, we amplify the fragment of VEB gene containing the position 168. Then we detect the high resolution melt curve and analyze them. At last, we analyze the results of sequence and high resolution melt( HRM ). Results VEB-1 and VEB-3 gene are markedly different through HRM analysis. Conclusion It is accurately and quickly for us to identify the VEB-3 from other hypotype through the technology of HRM.

7.
Acta méd. costarric ; 48(3): 108-112, jul.-set. 2006. ilus
Artigo em Espanhol | LILACS | ID: lil-581180

RESUMO

La enfermedad producida por el virus de la enfermedad de Borna (VEB) o Borna Disease Virus (BDV), conocida como una encefalitis fatal, se ha reportado en caballos y ovejas en Europa Central, desde hace más de dos siglos. Los animales infectados por el VEB muestran cambios en el comportamiento: ansiedad, agresividad, separación del rebaño e hiperactividad. Estos signos también pueden encontrarse en seres humanos, con trastornos psiquiátricos como: enfermedad bipolar, depresión, esquizofrenia o encefalitis idiopáticas. Estas manifestaciones en los animales infectados se deben principalmente, a la respuesta inmune contra las células infectadas del sistema nervioso central (SNC). Desde 1980 se ha demostrado evidencia serológica de infección por el VEB en humanos. Sin embargo, aún existe mucho por investigar en este tema. En numerosos estudios se ha intentado asociar la presencia de anticuerpos o de partículas virales con manifestaciones psiquiátricas. Debido a que los desórdenes psiquiátricos son un problema importante en salud pública, y a que la gran mayoría de los reportes científicos se han hecho en países desarrollados en donde la epidemiología de las enfermedades muestran un comportamiento muy distinto a la que se observa en países tropicales en vías de desarrollo, es necesario realizar análisis rigurosos para corroborar o refutar el efecto de la infección por el VEB en algunas enfermedades mentales.


The disease caused by Borna Disease Virus (BDV), known as fatal encephalitis, has been diagnosed in horses and sheeps en Central Europe for over a century. Infected animals show changes in the behaviour such as anxiety, separation of the herd, and hyperactivity. This signs can be found in humans with psychiatric syndromes like bipolar disease, depression, schizophrenia, or idiopathic diseases. The manifestations in infected animals are due to the immune response against the infected cells in the central nervous system. Since 1980, serological evidence of BDV infection has been reported in humans and many suggested an association of specific antibodies or viral particles with psychiatric manifestations.Because most of the studies have been done in developed countries where epidemiological manifestations are different to those observed in tropical developing countries, it is necessary to do rigorous analysis to corroborate or refute the effect of BDV in some mental diseases.


Assuntos
Humanos , Transtorno Bipolar , Vírus da Doença de Borna , Sistema Nervoso Central , Esquizofrenia
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