A member asked:

How come throat swabs are screened for beta-haemolytic colonies?

A doctor has provided 1 answer

Quick diagnosis: A rapid strep test is a quick method of identifying a specific bacteria in the back of your throat. However, if you truly have a bacterial infection, this technique will miss other causes of infection. Furthermore, there are people who carry the organism in their throats and are asymptomatic. This is simply a quick method of ruling out strep. Infection when you have a sore throat.

Answered 7/13/2012

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