Several health workers in protective clothing appeared to be assisting a patient  in a room on the sixth floor of Madrid's Carlos III Hospital yesterday, where a Spanish nurse who contracted Ebola is hospitalised.

There were 14 people in the hospital's isolation unit after seven more people turned themselves in on Thursday evening.

To date, one person, Spanish nurse Teresa Romero, is the only one to have tested positive for the deadly disease, and she is stable in a critical condition. Spanish health authorities have confirmed she is being treated in a room on the sixth floor.

The most recent admissions to the Carlos III Hospital included two hairdressers who had given Romero a beauty treatment before she was diagnosed with Ebola, and hospital staff who had treated the 44-year-old nurse. The Carlos III hospital said they had all turned themselves in voluntarily to be monitored for signs of the disease.

Other persons being monitored include Romero's husband. None have so far tested positive.

All patients in isolation are in rooms on the fifth floor, the hospital has said.