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Definitions

List of terms for Tuberculosis

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XDR-TB

Extensively drug-resistant tuberculosis; this is defined as MDR-TB with additional resistance to three or more of the six classes of second-line tuberculosis drugs.

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Science at Rio+20 by iStock/RapidEye

Latest on Rio+20

We track the news on science, technology and the Rio+20 Earth Summit
Woman harvesting rice, Nepal - Flickr/Global Crop Diversity Trust

Goals for Rio+20

Colombian official Paula Caballero Gómez on why we need Sustainable Development Goals

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A SciDev.Net spotlight explores the likely impacts of climate change on water security in the developing world
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The business of health

Business leaders have much to contribute to meeting the health MDGs in developing countries, a new alliance says
WHO/TDR/Crump

Mini cures

Our latest Spotlight looks at whether nanotech can improve healthcare in developing countries