🦠microbiology review

Focal infection

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025

Definition

A focal infection is a localized bacterial infection that spreads to other parts of the body, causing secondary infections. It often originates in areas such as the teeth, tonsils, or sinuses.

5 Must Know Facts For Your Next Test

  1. Focal infections can lead to serious systemic conditions like endocarditis or osteomyelitis.
  2. Common sites for focal infections include dental abscesses and infected tonsils.
  3. These infections are typically caused by bacteria such as Streptococcus and Staphylococcus species.
  4. Treatment usually involves antibiotics and addressing the primary site of infection.
  5. Focal infections can become chronic if not properly treated, leading to recurrent health issues.

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