Infección concomitante por tuberculosis y el virus de la inmunodeficiencia humana: situación epidemiológica en el departamento del Meta, 2010-2015

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Abstract

Resumen Introducción. Una tercera parte del incremento de los casos de tuberculosis se atribuye a la propagación del HIV. Objetivo. Describir la infección concomitante de tuberculosis y HIV en el departamento del Meta durante el periodo de 2010 a 2015. Materiales y métodos. Se hizo un estudio observacional, descriptivo y retrospectivo. Se seleccionaron los 219 casos de análisis y se elaboraron dos nuevas bases de datos que fueron analizadas en tres fases: determinación de las características sociodemográficas y clínicas, construcción de indicadores por municipio (prevalencia y éxito terapéutico) y estratificación en situaciones epidemiológicas según la prevalencia (carga) de la enfermedad. Resultados. El 60 % de los municipios se ajustó a la situación designada como 2. El tratamiento de las personas con infección concomitante de tuberculosis y HIV cuya condición de ingreso era nueva, tuvo 2,39 veces más probabilidades de ser exitoso que el de los previamente tratados, siendo esta asociación estadísticamente significativa (razón de posibilidades, RP=2,39; IC95% 1,3-9,6; p=0,01). Conclusión. La estratificación por situaciones epidemiológicas es útil para planificar actividades de prevención y control.

Translated abstract

Abstract Introduction. One third of the increase in tuberculosis cases is attributed to the spread of HIV. Objective. To describe the Tb/HIV coinfection in the department of Meta from 2010 to 2015. Materials and methods. We conducted an observational, descriptive and retrospective study. After selecting 219 cases for analysis, two new databases were constructed and analyzed in three phases: Identification of sociodemographic and clinical characteristics, indicators by municipality (prevalence and therapeutic success) and stratification in epidemiological scenarios according to the prevalence (burden) of the illness. Results. Sixty percent of the municipalities corresponded to scenario 2. People with Tb/HIV coinfection who had not been treated previously, had 2.39 times more probability of having therapeutic success compared to those previously treated, this association being statistically significant (RP=2,39; 95% CI 1,3-9,6; p=0,01). Conclusion. Stratification by epidemiological scenarios is useful for planning prevention and control activities.

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Prevalence of tuberculosis, hepatitis C virus, and HIV in homeless people: a systematic review and meta-analysis

Ulla Beijer, Achim Wolf, Seena Fazel (2012)

Summary Background 100 million people worldwide are homeless; rates of mortality and morbidity are high in this population. The contribution of infectious diseases to these adverse outcomes is uncertain. Accurate estimates of prevalence data are important for public policy and planning and development of clinical services tailored to homeless people. We aimed to establish the prevalence of tuberculosis, hepatitis C virus, and HIV in homeless people. Methods We searched PubMed, Embase, and Cumulative Index to Nursing and Allied Health Literature for studies of the prevalence of tuberculosis, hepatitis C virus, and HIV in homeless populations. We also searched bibliographic indices, scanned reference lists, and corresponded with authors. We explored potential sources of heterogeneity in the estimates by metaregression analysis and calculated prevalence ratios to compare prevalence estimates for homeless people with those for the general population. Findings We identified 43 eligible surveys with a total population of 63 812 (59 736 homeless individuals when duplication due to overlapping samples was accounted for). Prevalences ranged from 0·2% to 7·7% for tuberculosis, 3·9% to 36·2% for hepatitis C virus infection, and 0·3% to 21·1% for HIV infection. We noted substantial heterogeneity in prevalence estimates for tuberculosis, hepatitis C virus infection, and HIV infection (all Cochran's χ2 significant at p<0·0001; I 2=83%, 95% CI 76–89; 95%, 94–96; and 94%, 93–95; respectively). Prevalence ratios ranged from 34 to 452 for tuberculosis, 4 to 70 for hepatitis C virus infection, and 1 to 77 for HIV infection. Tuberculosis prevalence was higher in studies in which diagnosis was by chest radiography than in those which used other diagnostic methods and in countries with a higher general population prevalence than in those with a lower general prevalence. Prevalence of HIV infection was lower in newer studies than in older ones and was higher in the USA than in the rest of the world. Interpretation Heterogeneity in prevalence estimates for tuberculosis, hepatitis C virus, and HIV suggests the need for local surveys to inform development of health services for homeless people. The role of targeted and population-based measures in the reduction of risks of infectious diseases, premature mortality, and other adverse outcomes needs further examination. Guidelines for screening and treatment of infectious diseases in homeless people might need to be reviewed. Funding The Wellcome Trust.

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Treatment of multidrug-resistant tuberculosis.

M Iseman (1993)

The frequency of infections with M. tuberculosis resistant to antituberculous drugs is increasing in the United States and globally. This increase is a major threat to tuberculosis treatment and control programs. To prevent this situation from worsening, initial treatment programs that entail directly observed therapy supported by effective inducements or enforcements must be used. Retreatment of patients who have multidrug-resistant tuberculosis should be carried out in programs with comprehensive microbiologic, pharmacokinetic, psychosocial, and nutritional support systems. Regimens of multiple drugs, which generally are poorly tolerated and more toxic than traditional regimens, must be administered for 18 to 36 months. Resectional surgery may be required for substantial numbers of patients. For patients with AIDS who acquire tuberculosis caused by multiply-resistant strains, the disease may prove lethal before effective therapy can be implemented. Ultraviolet irradiation systems should be used to protect health care personnel and other patients in high-risk environments. Enhanced federal, state, and local programs for prevention and control are urgently needed, and research to identify new medications and systems for their delivery is essential.

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Tuberculosis extrapulmonar, una revisión

M. Ramírez-Lapausa, A. Menéndez-Saldaña, A. Noguerado-Asensio (2015)

Hasta en un 25% de los casos de tuberculosis existe afectación extrapulmonar. Esta afectación es producida por la diseminación hematógena y linfática del bacilo de M. tuberculosis hacia otros órganos. Las localizaciones más frecuentes son la ganglionar, pleural y osteo-articular. El problema de estas formas de tuberculosis radica en la dificultad para llegar a su diagnóstico definitivo, ya que tanto los síntomas clínicos, como las pruebas de imagen pueden ser inespecíficos. La mayoría de las veces es necesario recurrir a pruebas diagnósticas invasivas como PAAF guiada con ecografía o TAC, para la recolección de muestras biológicas para su diagnóstico. A pesar del auge y el avance, en los últimos años, de los métodos moleculares para la detección precoz de ADN de la micobacteria, el cultivo sigue siendo el gold estándar que permite el diagnóstico microbiológico definitivo. El tratamiento de estas formas de tuberculosis, no va diferir de las pautas de tratamiento de las formas pulmonares. Se recomienda utilizar los mismos regímenes de antibióticos con una duración de 6 meses y únicamente prolongar la duración en las tuberculosis con afectación del sistema nervioso y en la espondilitis tuberculosa con afectación neurológica.