Guinea has suffered a setback in its fight against Ebola with a rash of new cases, including three doctors infected by the virus, with officials blaming weak surveillance and a failure to follow safety procedures.

The outbreak, which began in eastern Guinea more than a year ago and has killed over 10,000 people in the three West African countries worst hit, had appeared to be on the wane, but Guinea has seen cases rise for three consecutive weeks, according to World Health Organization data.

A government health report from the weekend showed there were 21 new cases in a single day, a spike from the recent daily average of eight.