📚 Deeper Dive · Scenario 15 of 57

Infection & Sepsis, In Depth

Recognizing infection early — the why behind catching sepsis
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Coach Katie
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Sepsis: the body's overwhelming response to infection

A fever can be simple — or it can be the first sign of sepsis, the body's dysregulated, whole-body response to an infection. But the trigger is not only a fever: an abnormally low temperature or any acute unexplained deterioration can signal sepsis too, so the afebrile or hypothermic patient can still be septic. Sepsis is a leading cause of hospital death, but early recognition dramatically improves survival, and the nurse is often the first to see the pattern.

Think of a smoke alarm chain through a building. One detector (the fever) goes off, but it's the pattern — alarms lighting up across floors — that tells you the fire is spreading. Sepsis is that spreading pattern across body systems.

The sepsis pattern

  • Abnormal temperature (high or low).
  • Fast heart rate and fast breathing.
  • Falling blood pressure.
  • New confusion and dropping urine output.
Time is the treatment. Sepsis can progress to septic shock and organ failure quickly. Rapid recognition and the treatment bundle — cultures, prompt antibiotics, and IV fluids — save lives.

Elders present differently

Older adults often do not mount a big fever. New confusion, weakness, or a sudden functional decline may be the main sign of infection — take it seriously and report it.