The cause of the outbreak has been determined by laboratory confirmation to be Norwalk or norovirus.

However, due to constrained resources, laboratory confirmation of reportable infectious diseases was limited in practice.

Doctors may have to make treatment decisions without laboratory confirmation.

Treatment should not be delayed until laboratory confirmation is obtained.

Another laboratory confirmation is a fourfold increase in virus-specific antibodies 10 to 14 days later.

While most mothers stated that their treatment was hormonal, there was no laboratory confirmation of these reports.

Waiting for laboratory confirmation of influenza to begin treatment with antiviral drugs is not necessary.

If a decision is made to test for influenza, treatment should not be delayed while waiting for laboratory confirmation.

With the laboratory confirmation, "she was very relieved," he said.

In straightforward cases, a diagnosis may be made and treatment given based on symptoms alone without further laboratory confirmation.