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What are bacterial infections?

Dr. Jeanne Morrison, PhD
Family Practitioner

Bacterial infections are caused by microscopic single-celled organisms, which invade the body. An infection occurs when bacteria multiply in a particular area and cause inflammation. Examples of infections caused by bacteria are strep throat, urinary tract infections, and diphtheria.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.