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Home > Patient & Family Resources > Health Library > Bacterial infection
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A bacterial infection is an infection caused by bacteria. Bacterial infections can often be treated successfully with antibiotics.
An infection may begin as a bacterial infection. Or a bacterial infection may follow a viral infection that does not get better. When a viral infection doesn't get better for 10 days or more, or when a viral infection starts to improve and then unexpectedly gets worse, a bacterial infection may be more likely.
A bacterial infection usually affects a single area in the body, such as the sinuses, lungs, ears, or urinary tract. Common bacterial infections include sinusitis, pneumonia, strep throat, ear infections, and bladder infections. If untreated, a bacterial infection can spread to the bloodstream. This condition is called bacteremia.
Current as of: July 1, 2021
Author: Healthwise Staff
Medical Review:E. Gregory Thompson MD - Internal Medicine & Adam Husney MD - Family Medicine & Robert L. Cowie MB, FCP(SA), MD, MSc, MFOM - Pulmonology
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