Related Experiment Video
Updated: Aug 19, 2026
Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
Published on: November 20, 2015
C-reactive protein levels in the extremely premature infant: case studies and literature review
1Women's and Childrens Hospital, Los Angeles County + USC Medical Center, CA 90033, USA.
Insights
Neonatal sepsis management requires careful antibiotic use. Serial C-reactive protein (CRP) monitoring in extremely low birth weight infants showed normalized CRP levels despite persistent positive blood cultures, challenging current sepsis treatment guidelines.
Area of Science:
- Neonatal Medicine
- Infectious Diseases
- Clinical Chemistry
Background:
- Neonatal sepsis is a major cause of mortality and morbidity in intensive care units.
- There is a critical need to limit antibiotic use to control costs and prevent antimicrobial resistance.
- C-reactive protein (CRP) is a widely used biomarker for infection and inflammation, typically decreasing as inflammation resolves.
Purpose of the Study:
- To evaluate the utility of serial C-reactive protein (CRP) measurements in guiding antibiotic therapy duration for neonatal sepsis.
- To investigate the clinical course of extremely low birth weight infants with sepsis, focusing on CRP trends and blood culture results.
Main Methods:
- Serial C-reactive protein (CRP) levels were monitored in neonatal intensive care unit patients undergoing sepsis evaluation.
- The study followed CRP values from the initiation of sepsis evaluation until the discontinuation of antibiotic therapy.
- Clinical status and blood culture results were recorded throughout the treatment period.
Main Results:
- Two extremely low birth weight infants demonstrated clinical improvement with antibiotic therapy.
- Despite continued positive blood cultures, these infants showed normalized C-reactive protein (CRP) levels.
- This dissociation between CRP normalization and persistent bacteremia challenges the conventional interpretation of CRP in sepsis management.
Conclusions:
- Serial C-reactive protein (CRP) normalization may not always correlate with complete sepsis resolution in extremely low birth weight infants.
- Relying solely on CRP levels to determine the cessation of antibiotic therapy in premature infants with sepsis may be problematic.
- Further research is needed to refine guidelines for antibiotic stewardship in neonatal sepsis, considering complex biomarker patterns.
Abstract:
Sepsis continues to be a significant source of morbidity and mortality in the neonatal intensive unit. At the same time, we need to contain medical costs and prevent the rapid growth of resistant organisms by limiting unnecessary antibiotic use. Among laboratory indexes studied as indirect indicators of the presence and resolution of infection and inflammation, C-reactive protein (CRP) has gained more recent widespread use. CRP usually increases in a delayed manner with the onset of inflammation and decreases as inflammation resolves. We follow serial CRP values in our neonatal intensive care unit from the start of a sepsis evaluation until antibiotic therapy is withdrawn. We describe two extremely low birth weight patients who improved clinically with therapy and whose CRP levels normalized in the face of continued positive blood cultures. The implications for the use of CRP in deciding when to halt therapy in premature infants are discussed.
