Media playback is unsupported on your device

Superspreaders: Tracking tuberculosis

27 March 2014 Last updated at 17:30 GMT

Tuberculosis (TB) is still a huge problem throughout the world.

South Africa is particularly hard hit by the disease. It is one of only two countries where incidence of TB is still rising.

The problem is that many cases are now resistant to drug treatment, meaning some patients are being sent back home while they are still infectious.

Now a team at the University of Cape Town in South Africa is using new tools to investigate how the return of patients to their communities affects the spread of the disease.

Meera Senthilingam has been seeing the trial in action.

More from Health Check

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.