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Sepsis

Sepsis is life-threatening organ dysfunction caused by a dysregulated response to infection. It is a medical emergency, not just a severe fever or the presence of bacteria in the blood.

At a glance

Quick facts

Category
Infectious diseases
What it is
Sepsis is life-threatening organ dysfunction caused by a dysregulated response to infection.
Typical presentation
New confusion, extreme discomfort, rapid breathing, rapid heart rate, fever or unusually low temperature, or clammy skin may occur in someone with an infection.
Assessment
Rapid clinical assessment evaluates infection, organ function, oxygenation and circulation; blood cultures and laboratory tests help guide treatment without delaying emergency care.
Treatment approach
Urgent treatment includes infection-directed medicines, fluids or circulatory support when indicated, source control and close monitoring.
Key safety concern
Suspected sepsis is an emergency.

Names & terminology

Understanding the name

Sepsis is life-threatening organ dysfunction caused by a dysregulated response to infection. It is a medical emergency, not just a severe fever or the presence of bacteria in the blood.

Clinical reference

Clinical profile

Summary
CategoryInfectious diseases
What it isSepsis is life-threatening organ dysfunction caused by a dysregulated response to infection.
Typical presentationNew confusion, extreme discomfort, rapid breathing, rapid heart rate, fever or unusually low temperature, or clammy skin may occur in someone with an infection.
AssessmentRapid clinical assessment evaluates infection, organ function, oxygenation and circulation; blood cultures and laboratory tests help guide treatment without delaying emergency care.
Treatment approachUrgent treatment includes infection-directed medicines, fluids or circulatory support when indicated, source control and close monitoring.
Key safety concernSuspected sepsis is an emergency.

Overview

Sepsis is life-threatening organ dysfunction caused by a dysregulated response to infection. It is a medical emergency, not just a severe fever or the presence of bacteria in the blood.

Symptoms and presentation

New confusion, extreme discomfort, rapid breathing, rapid heart rate, fever or unusually low temperature, or clammy skin may occur in someone with an infection.

CLINICAL FEATURES

Presentation and warning signs

The pattern varies and cannot replace an individual assessment.

Clinical overview
Presentation
  • New confusion
  • extreme discomfort
  • rapid breathing
  • rapid heart rate
Clinical assessment
  • Rapid clinical assessment evaluates infection, organ function, oxygenation and circulation; blood cultures and laboratory tests help guide treatment without delaying emergency care
  • Interpret results with history and examination
When to seek urgent care
  • Suspected sepsis is an emergency. A person with infection and new confusion, breathing problems or signs of poor circulation needs immediate emergency assessment.

Emergency symptoms and clinical severity should be assessed locally.

Clinical assessment and diagnosis

Rapid clinical assessment evaluates infection, organ function, oxygenation and circulation; blood cultures and laboratory tests help guide treatment without delaying emergency care.

ASSESSMENT

How the clinical assessment proceeds

Exact investigations depend on the clinical context.

Clinical workflow
1Define the symptom patternNew confusion, extreme discomfort, rapid breathing, rapid heart rate, fever or unusually low temperature, or clammy skin may occur in someone with an infection.
2Assess disease or alternative causesRapid clinical assessment evaluates infection, organ function, oxygenation and circulation; blood cultures and laboratory tests help guide treatment without delaying emergency care.
3Discuss care and monitoringUrgent treatment includes infection-directed medicines, fluids or circulatory support when indicated, source control and close monitoring.

Treatment and management

Urgent treatment includes infection-directed medicines, fluids or circulatory support when indicated, source control and close monitoring.

Treatment & care hub

Elements of care

Individual treatment is based on diagnosis, comorbidities and clinician assessment.

Management overview
Confirm diagnosisFirst step

Understand the underlying condition

Rapid clinical assessment evaluates infection, organ function, oxygenation and circulation; blood cultures and laboratory tests help guide treatment without delaying emergency care.

Tailor treatmentIndividualized

Choose evidence-based management

Urgent treatment includes infection-directed medicines, fluids or circulatory support when indicated, source control and close monitoring.

Monitor safetyImportant

Recognize warning signs

Suspected sepsis is an emergency. A person with infection and new confusion, breathing problems or signs of poor circulation needs immediate emergency assessment.

Diagnosis→Tailored care→Monitoring

Complications and when to seek help

Suspected sepsis is an emergency. A person with infection and new confusion, breathing problems or signs of poor circulation needs immediate emergency assessment.

EVIDENCE AND DATA

Interpreting population statistics

Comparable, disease-specific prevalence or incidence data have not yet been curated for this entry. No prevalence estimate is supplied.

MedlinePlus Health Topics ↗
Data availabilityNot quantifiedUse condition-specific epidemiology, not estimated figures
No unsupported regional or country comparison is presented.

Frequently asked questions

What is Sepsis?

Sepsis is life-threatening organ dysfunction caused by a dysregulated response to infection. It is a medical emergency, not just a severe fever or the presence of bacteria in the blood.

How is it assessed?

Rapid clinical assessment evaluates infection, organ function, oxygenation and circulation; blood cultures and laboratory tests help guide treatment without delaying emergency care.

When should I seek urgent help?

Suspected sepsis is an emergency. A person with infection and new confusion, breathing problems or signs of poor circulation needs immediate emergency assessment.

Sources

  1. MedlinePlus, US National Library of Medicine — Sepsis — health topic ↗
  2. CDC — About sepsis ↗

This is an editorial evidence summary awaiting independent clinician review. It is not a diagnosis, a treatment plan, or a substitute for personalized medical care.