An outbreak of cholera in Guinea is being brought under control, the number of new cases is falling and fewer victims of the highly infectious disease are dying, a World Health Organisation (WHO) official said on Tuesday. Amadou Balde, an official at the WHO office in the Guinean capital Conakry, said only three people had died last week compared to six a week earlier, and the number of new cases had slid to 51 from 59.