Kimberley Aboriginal Medical Services has reported 10 new cases in Bidyadanga, while a further three have been picked up in the nearby community of Beagle Bay.
A lockdown remains in place in Bidyadanga, about 180km south of Broome in the Kimberley region, while more testing is undertaken.
"Our remarkable clinic staff, pop health and rapid response team crew donned PPE this afternoon to begin street by street testing in the hot, humid conditions of Bidyadanga," KAMS said in a Facebook post on Thursday.
"Over the coming days, KAMS staff aim to provide testing to the entire community."
It said 90 per cent of residents aged 12 and over were double dosed, with 10 per cent having received a booster.
WA Health said positive cases were being provided with care packages including meters to monitor vitals such as blood oxygen levels. Anyone who has been in the community since February 15 is being urged to present for testing.
Six cases have so far been recorded in the smaller community of Mantamaru, near the borders with South Australia and the Northern Territory.
As of Thursday, WA had 2272 active cases and seven people are in hospital.
The state's third vaccination dose rate has surpassed 60 per cent and is on track to reach 70 per cent by the time the borders reopen on March 3.
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