An investigation into an apparent outbreak of tuberculosis at a Perth hospital three months ago has found officials jumped the gun by advising more than 100 staff to be tested.
The Australian Nursing Federation accused the Health Department in October of bungling the incident at Osborne Park Hospital by taking too long to trace staff and patients, after one patient was diagnosed with active TB.
But a review by Health Department infectious disease experts and WA's chief health officer found the nine staff who tested positive to TB were unlikely to have been infected by the patient.
It found the hospital rushed into a decision to send letters to 110 staff advising them they may have been exposed to the disease and should consider being tested.
Of those, 100 were tested and nine were found to be positive, including seven nurses.
A spokeswoman for North Metropolitan Health Service, which manages the hospital, said the review found the initial decision to carry out a large-scale contact tracing was rushed because the patient was not very infectious and posed little risk to public health.