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ORPHA:90051Particular clinical situation in a disease or syndrome
What it is
A rare systemic condition affecting neonates born at less than 37 weeks gestational age and characterized by life-threatening organ dysfunction caused by a dysregulated host response to an infection, which may have been acquired shortly before or during birth (resulting in early-onset neonatal sepsis during the first 72 hours of life), or after birth (leading to late-onset neonatal sepsis between 72 hours and three months). Prematurity constitutes one of the primary risk factors for neonatal sepsis. The clinical picture may develop gradually with signs and symptoms like irritability, lethargy, or poor feeding, or progress rapidly to respiratory distress, fever, hypothermia, hypotension, shock, and multiple organ failure.
Key facts
- Prevalence
- 1-5 / 10 000 (Europe)
- Age of onset
- Neonatal
- Inheritance
- Not applicable
- Classified as
- Particular clinical situation in a disease or syndrome
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Signs and symptoms
Very common80–99%
5Common30–79%
17- Abdominal distention
- Abnormal mucociliary clearance
- Caesarian section
- Decreased body weight
- Decreased total neutrophil count
- Dyspnea
- Elevated circulating C-reactive protein concentration
- Fever
- Functional abnormality of the gastrointestinal tract
- Gastrointestinal dysmotility
- Hypothermia
- Increased circulating interleukin 6 concentration
- Increased total leukocyte count
- Metabolic acidosis
- Neonatal hypotonia
- Pallor
- Severe infection
Sometimes5–29%
26- Abnormal bleeding
- Abnormality of the anterior fontanelle
- Abnormal respiratory system physiology
- Anemia
- Bradycardia
- Cyanosis
- Decreased liver function
- Diarrhea
and 18 more in this range
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
ICD-10 codes
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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