Tuberculosis in the elderly.

Tuberculosis is still a major cause of morbidity and mortality worldwide. Recent studies have suggested that even in the developed world its incidence in the elderly is increasing. Symptoms of active tuberculosis are non-specific and less pronounced in the elderly. Radiological features are more likely to be 'atypical' in the older subject and skin tests more frequently negative. This results in delay in diagnosis and higher mortality from tuberculosis in the aged population. A high degree of clinical suspicion is therefore required to ensure the diagnosis is not missed and appropriate treatment instigated.