RESUMEN
OBJECTIVE: To refine and evaluate a recently published radiological disease severity score for the prediction of month 2 and end of treatment outcomes in pulmonary tuberculosis (TB). Radiological extent of disease has been linked to early and late outcomes of anti-tuberculosis treatment, but no validated tools are available to quantify this parameter. DESIGN: We enrolled 449 adult, human immunodeficiency virus negative participants with smear- or culture-proven TB from three TB biomarker studies in Cape Town, South Africa. Full-size posteroanterior baseline chest X-rays (CXRs) were evaluated by two clinicians after standardising the published scoring method and the predictive ability assessed for month 2 and final treatment outcomes. RESULTS: Baseline CXR scores were significantly different in the favourable and unfavourable outcome groups; however, the predictive ability for outcomes at all time points was poor (ROC area under curve â©¿0.68). Inter-reader reliability was high (r = 0.86, P < 0.001), but agreement in cavity identification was modest. CONCLUSION: Standardised application of a CXR score derived from the presence of cavities and overall extent of parenchymal disease in active TB showed good inter- and intrareader reliability. Scores differed significantly in treatment outcome groups, but did not allow accurate outcome prediction.
Asunto(s)
Radiografía Torácica/métodos , Índice de Severidad de la Enfermedad , Tuberculosis Pulmonar/diagnóstico por imagen , Adulto , Biomarcadores/análisis , Femenino , Humanos , Masculino , Persona de Mediana Edad , Mycobacterium tuberculosis , Pronóstico , Reproducibilidad de los Resultados , Sudáfrica , Esputo/microbiología , Resultado del Tratamiento , Adulto JovenRESUMEN
The prevalence of food allergy is increasing worldwide and is an important cause of anaphylaxis. There are no local South African food allergy guidelines. This document was devised by the Allergy Society of South Africa (ALLSA), the South African Gastroenterology Society (SAGES) and the Association for Dietetics in South Africa (ADSA). Subjects may have reactions to more than one food, and different types and severity of reactions to different foods may coexist in one individual. A detailed history directed at identifying the type and severity of possible reactions is essential for every food allergen under consideration. Skin-prick tests and specific immunoglobulin E (IgE) (ImmunoCAP) tests prove IgE sensitisation rather than clinical reactivity. The magnitude of sensitisation combined with the history may be sufficient to ascribe causality, but where this is not possible an incremental oral food challenge may be required to assess tolerance or clinical allergy. For milder non-IgE-mediated conditions a diagnostic elimination diet may be followed with food re-introduction at home to assess causality. The primary therapy for food allergy is strict avoidance of the offending food/s, taking into account nutritional status and provision of alternative sources of nutrients. Acute management of severe reactions requires prompt intramuscular administration of adrenaline 0.01 mg/kg and basic resuscitation. Adjunctive therapy includes antihistamines, bronchodilators and corticosteroids. Subjects with food allergy require risk assessment and those at increased risk for future severe reactions require the implementation of risk-reduction strategies, including education of the patient, families and all caregivers (including teachers), the provision of a written emergency action plan, a MedicAlert necklace or bracelet and injectable adrenaline (preferably via auto-injector) where necessary.
Asunto(s)
Alérgenos/inmunología , Hipersensibilidad a los Alimentos/etiología , Guías de Práctica Clínica como Asunto , Consenso , Epinefrina/administración & dosificación , Hipersensibilidad a los Alimentos/epidemiología , Hipersensibilidad a los Alimentos/inmunología , Humanos , Inmunoglobulina E/inmunología , Medición de Riesgo/métodos , Pruebas Cutáneas/métodos , Sudáfrica/epidemiologíaRESUMEN
SUMMARY: We performed a randomised controlled trial (RCT) to determine whether risedronate 35 mg once weekly prevents bone loss following an 8-week reducing course of prednisolone given for an exacerbation of inflammatory bowel disease (IBD). The greatest change in bone mineral density (BMD) was at Ward's triangle (WT), which fell by 2.2% in the placebo group, compared with a reduction of 0.8% in the risedronate group. INTRODUCTION: Whether bisphosphonates can prevent bone loss associated with intermittent glucocorticoid (GC) therapy is unknown, reflecting the difficulty in performing RCTs in this context. METHOD: To explore the feasibility of RCTs to examine this question, lumbar spine (LS; L2-4) and hip dual X-ray absorptiometry (DXA) scans were performed in 78 patients commencing a GC therapy course for a relapse of IBD. They were then randomised to receive placebo or risedronate 35 mg weekly for 8 weeks, after which the DXA scan was repeated. RESULTS: For LS BMD, there was no change in the placebo group (0.1 +/- 0.4, p = 0.9), but there was an increase after risedronate (0.8 +/- 0.4, p = 0.04; mean% +/- SEM by paired Student's t test). There were small decreases in both groups at the total hip (-0.5 +/- 0.3, p = 0.04; -0.5 +/- 0.3, p < 0.05, placebo and risedronate, respectively). At WT, BMD fell after placebo (-2.2 +/- 0.5, p = 0.001) but not risedronate (-0.8 +/- 0.5, p = 0.09; p = 0.05 for between-group comparison). CONCLUSION: RCTs can be used to examine whether bisphosphonates prevent bone loss associated with intermittent GC therapy, providing metabolically active sites such as WT are employed as the primary outcome.