The WHO reports new numbers on the Ebola outbreak.

The World Health Organization says the death toll from the worst outbreak of Ebola on record has reached 887.

That’s an increase of 158 since the global health body released figures on July 31.

WHO said in a statement on Monday that there now have been more than 1,600 cases of Ebola since the disease emerged in Guinea earlier this year.

According to WHO, there now have been a total of 358 deaths in Guinea, 255 deaths in Liberia, 273 deaths in Sierra Leone and one in Nigeria.

The news comes as Nigeria announced Monday that it now had confirmed a second case in Africa’s most populous nation. Health Minister Onyebuchi Chukwu said the case is a doctor who had helped treat Patrick Sawyer, the Liberian-American man who died July 25 days after arriving in Nigeria from Liberia.

Three other people who treated Sawyer are showing symptoms, and are being tested.