Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 6 de 6
Filtrar
Más filtros











Base de datos
Intervalo de año de publicación
1.
Med Parazitol (Mosk) ; (1): 7-12, 2013.
Artículo en Ruso | MEDLINE | ID: mdl-23805480

RESUMEN

Cerebral toxoplasmosis is one of the leading causes of neurologic diseases with high mortality rates in patients with HIV infection. Invasion was difficult to diagnose for a number of objective reasons. The objective of the investigation was to determine the clinical sensitivity of different laboratory techniques as both a single study and their various combinations to verify the diagnosis of cerebral toxoplasmosis in HIV-infected patients. Blood and cerebrospinal fluid were tested in 51 patients with Stage 4B HIV infection (AIDS) with the verified diagnosis of cerebral toxoplasmosis. Separate determination of specific antibodies of IgG, IgM, IgA and toxoplasma DNA in the blood and cerebrospinal fluid was shown to have an insufficient clinical sensitivity (37.3-68.6%). The benefits of various combinations of immunological and molecular biological assays enhancing the diagnostic efficiency up to 76.5-96.1% are demonstrated.


Asunto(s)
Anticuerpos Antiprotozoarios/sangre , Encéfalo/patología , ADN Protozoario/sangre , Infecciones por VIH/patología , VIH , Toxoplasma/aislamiento & purificación , Toxoplasmosis Cerebral/diagnóstico , Adulto , Anticuerpos Antiprotozoarios/líquido cefalorraquídeo , Encéfalo/parasitología , Encéfalo/virología , Coinfección , ADN Protozoario/líquido cefalorraquídeo , Progresión de la Enfermedad , Femenino , Infecciones por VIH/sangre , Infecciones por VIH/líquido cefalorraquídeo , Infecciones por VIH/virología , Humanos , Inmunoensayo , Inmunoglobulina A/sangre , Inmunoglobulina A/líquido cefalorraquídeo , Inmunoglobulina G/sangre , Inmunoglobulina G/líquido cefalorraquídeo , Inmunoglobulina M/sangre , Inmunoglobulina M/líquido cefalorraquídeo , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Reacción en Cadena de la Polimerasa , Toxoplasma/inmunología , Toxoplasmosis Cerebral/sangre , Toxoplasmosis Cerebral/líquido cefalorraquídeo , Toxoplasmosis Cerebral/parasitología
2.
Artículo en Ruso | MEDLINE | ID: mdl-22937714

RESUMEN

Contemporary representation of toxoplasmosis reactivation criteria in HIV infection is generalized. Significance of the issue is justified: toxoplasmosis is a leading neurological pathology in AIDS with a high lethality percentage due to complexity of clinical confirmation and difficulties of laboratory confirmation of the start of reactivation. Clinical, instrumental, immunologic, molecular genetic invasion reactivation criteria are discussed in the article and analysis of their effectiveness is performed; their most feasible combinations are justified. Further system analysis of the cerebral toxoplasmosis reactivation criteria specified in the article in combination with search of new pathogen dissemination markers will allow to obtain important information that has both fundamental interest and important practical significance.


Asunto(s)
Anticuerpos Antiprotozoarios/sangre , Infecciones por VIH/virología , ARN Protozoario/sangre , Toxoplasma/patogenicidad , Toxoplasmosis Cerebral/diagnóstico , Toxoplasmosis Cerebral/parasitología , Anticuerpos Antiprotozoarios/inmunología , Biomarcadores/análisis , Recuento de Linfocito CD4 , Linfocitos T CD4-Positivos/inmunología , Linfocitos T CD4-Positivos/patología , Coinfección , VIH/fisiología , Infecciones por VIH/sangre , Infecciones por VIH/inmunología , Humanos , Inmunoglobulina G/sangre , Inmunoglobulina G/inmunología , Imagen por Resonancia Magnética , Recurrencia , Toxoplasma/fisiología , Toxoplasmosis Cerebral/sangre , Toxoplasmosis Cerebral/inmunología
4.
Artículo en Ruso | MEDLINE | ID: mdl-20464997

RESUMEN

AIM: Comparative assessment of effectiveness of serologic methods for toxoplasmosis diagnostics in patients with HIV-infection. MATERIALS AND METHODS: Sera and CSF samples from 166 patients with AIDS stage IIIB were tested for antibodies to Toxoplasma gondii by indirect immunofluorescence, ELISA and immunoblotting. Results of serological tests were compared with clinical, pathological data as well as with results of MRI and PCR. RESULTS: Clinical value of IgG detection in blood and CSF by ELISA was shown--high level of antibodies marked reactivation of the invasion. IgG antibodies in CSF were detected only if high levels of IgG were present in the blood. Detection of antigenic determinants with molecular mass 18 - 20 and 65 - 70 kDa in immunoblotting was proposed as a criterion of cerebral toxoplasmosis reactivation. CONCLUSION: Complex laboratory serologic tests along with data obtained by MRI, PCR and microscopy of T. gondii cysts enhances the effectiveness of toxoplasmosis diagnostics. Knowledge of toxoplasmosis reactivation criteria in patients with AIDS will allow to develop the optimal protocol of toxoplasmosis diagnostics and substantiate measures for its prevention.


Asunto(s)
Infecciones Oportunistas Relacionadas con el SIDA/diagnóstico , Infecciones Oportunistas Relacionadas con el SIDA/epidemiología , Anticuerpos Antiprotozoarios/análisis , Infecciones por VIH/complicaciones , Toxoplasmosis/diagnóstico , Toxoplasmosis/epidemiología , Infecciones Oportunistas Relacionadas con el SIDA/complicaciones , Adulto , Anciano , Anticuerpos Antiprotozoarios/sangre , Anticuerpos Antiprotozoarios/líquido cefalorraquídeo , Antígenos de Protozoos/análisis , Antígenos de Protozoos/inmunología , Western Blotting/métodos , Epítopos/análisis , Epítopos/inmunología , Técnica del Anticuerpo Fluorescente Indirecta , Humanos , Inmunoglobulina G/análisis , Inmunoglobulina G/sangre , Inmunoglobulina G/líquido cefalorraquídeo , Persona de Mediana Edad , Federación de Rusia/epidemiología , Toxoplasma/aislamiento & purificación , Toxoplasmosis/complicaciones , Toxoplasmosis Cerebral/diagnóstico
6.
Bull Exp Biol Med ; 142(3): 299-303, 2006 Sep.
Artículo en Inglés, Ruso | MEDLINE | ID: mdl-17426834

RESUMEN

A new approach for the evaluation of oxidizability of proteins and lipids in the same sample of blood plasma was proposed. We tested a method for evaluation of metal-catalyzed oxidation of fibrinogen by the formation of bityrosine cross-links during oxidation detected by the increase in fluorescence at 415 nm. A correlation was revealed between parameters of oxidizability estimated by this marker and carbonyl derivatives (dinitrophenylhydrazine method). Oxidizability of total proteins from whole plasma was compared with oxidizability of plasma lipids (marker malonic dialdehyde). Study of these parameters in patients with coronary heart disease showed that the proposed experimental approach allows us to divide the sample into several subgroups differing in the resistance to oxidative stress. These data can be used for diagnostic and prognostic purposes.


Asunto(s)
Metabolismo de los Lípidos , Malondialdehído/sangre , Metales/farmacología , Estrés Oxidativo , Plasma/metabolismo , Proteínas/metabolismo , Tampones (Química) , Catálisis , Quelantes/farmacología , Cobre/metabolismo , Cobre/farmacología , Reactivos de Enlaces Cruzados/metabolismo , Deferoxamina/farmacología , Relación Dosis-Respuesta a Droga , Estudios de Evaluación como Asunto , Fibrinógeno/metabolismo , Concentración de Iones de Hidrógeno , Hierro/metabolismo , Hierro/farmacología , Metales/metabolismo , Oxidación-Reducción , Carbonilación Proteica/efectos de los fármacos , Cloruro de Sodio/química , Espectrometría de Fluorescencia , Factores de Tiempo
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA