There’s been an outbreak of scabies at one WA’s biggest mines.

Two new cases of the skin infestation have been confirmed at Roy Hill mine in Newman, The West reported.

It brings the total number of scabies cases to three after a worker was first diagnosed two weeks ago, and there a fears that number could rise.

Australian Manufacturing Workers Union WA secretary Steve McCartney said there were about 200 people at the site.

Several workers have been quarantined to their rooms.

Scabies is generally spread by direct, continued, skin-to-skin contact with someone who has it but shared personal items, such as bedding, clothing or towels, can also be blamed.

Hancock Prospecting, owned by Australian billionaire magnate Gina Rinehart, is the majority stakeholder in Roy Hill.