Infection

Definition

Infection is the invasion and multiplication of microorganisms such as bacteria, viruses, and parasites that are not normally present within the body. These pathogens can cause disease by disrupting normal bodily functions.

5 Must Know Facts For Your Next Test

1. Infections trigger an inflammatory response as part of the body's immune defense.
2. Signs and symptoms of infection may include fever, redness, swelling, pain, and loss of function.
3. Anti-inflammatory drugs can help manage symptoms associated with infections but do not treat the underlying cause.
4. Common anti-inflammatory drugs include NSAIDs (e.g., ibuprofen) and corticosteroids (e.g., prednisone).
5. The differentiation between bacterial and viral infections is crucial for appropriate treatment; antibiotics are effective against bacteria but not viruses.

Review Questions

• What are common signs and symptoms of an infection?
• Why is it important to differentiate between bacterial and viral infections?
• Name two types of anti-inflammatory drugs used to manage symptoms associated with infections.

Related terms

Inflammatory Response: The body's immediate reaction to injury or infection, characterized by redness, heat, swelling, pain, and loss of function.

Pathogen: A microorganism that can cause disease.

NSAIDs: Nonsteroidal anti-inflammatory drugs that reduce inflammation and relieve pain without steroids.