Extensively drug-resistant tuberculosis, or XDR-TB, will not respond to any of those drugs but might still be treatable.

VOA: special.2009.03.25

This method might be used to help engineer food crops that are resistant to extremely dry conditions.

VOA: special.2010.01.26

Malaria can be treated, but in many areas the parasites have become resistant to different drugs.

VOA: special.2009.12.07

Malaria can be treated, but in many areas the organisms have become resistant to different drugs.

VOA: special.2009.12.22