Some of the ultrastructural morphology displayed by an Ebola virus virion is revealed in this undated handout colorized transmission electron micrograph (TEM) obtained by Reuters August 1, 2014. The 2014 Ebola outbreak is the worst since the disease was discovered in the mid-1970s, with 729 deaths in four different countries.

Randgold Resources Ltd, which mines gold in Mali, Ivory Coast and the Democratic Republic of Congo, said it has advised its employees not to travel to areas affected by the deadly Ebola virus as a precaution.

Randgold said contractors had been instructed not to bring any workers from Ebola-affected areas to the company's sites.

The Ebola outbreak began in February in the forests of Guinea.

While the death toll there continues to rise, the epicentre has shifted to neighbouring Liberia and Sierra Leone.

Mali shares a border with Guinea, while Ivory Coast borders both Guinea and Liberia.

Randgold said that, although its operations are far from affected areas, it had undertaken a “thorough awareness campaign” about the disease for all its workers and continued to monitor the situation closely.

The World Health Organization (WHO) said on Wednesday that the death toll from the Ebola outbreak had risen to 932. - Reuters