GeneXpert for TB diagnosis: planned and purposeful implementation.

Xpert MTB/RIF is a major advance for TB diagnostics, especially for multidrug-resistant (MDR) TB and HIV-associated TB. But implementation concerns including cost, technical support requirements, and challenging demands of providing second-line TB drugs for diagnosed MDR-TB cases call for gradual, careful introduction based on country circumstances.

Viewpoint: Why and how tuberculosis control should be included in health sector reviews.

Sector-wide approaches (SWAps) are currently implemented in several, predominantly highly donor-dependent low-income countries, particularly in Sub-Saharan Africa. SWAp intends to enhance health sector performance, especially efficiency, effectiveness, coherence and sustainability. SWAps have been criticized for not being able to produce tangible results and the credibility of a SWAp would increase substantially if such results in terms of health services outputs could be demonstrated.

Comparison of PCR with the routine procedure for diagnosis of tuberculosis in a population with high prevalences of tuberculosis and human immunodeficiency virus.

Direct smear examination with Ziehl-Neelsen (ZN) staining for the diagnosis of tuberculosis (TB) as employed in most low-income countries is cheap and easy to use, but its low sensitivity is a major drawback. The low specificity of chest X-rays, used for the diagnosis of smear-negative TB, risks high levels of overdiagnosis. Major advances in molecular techniques, which rapidly identify mycobacterial DNA in sputa, may overcome these obstacles.

A Piot model to analyse case management in malaria control programmes.

At the beginning of the 21st century, malaria remains one of the most important public health problems in the world. An important control strategy to address this burden is adequate case management of malaria patients. The success of this strategy, however, does not solely depend on diagnosis and treatment, but also on a sequence of steps that patients have to take when they are ill.