Related Experiment Videos
Interleukin-6: a sensitive parameter for the early diagnosis of neonatal bacterial infection
C Buck1, J Bundschu, H Gallati
1University of Ulm, Department of Pediatrics, Germany.
Insights
Interleukin-6 (Il-6) is a sensitive marker for early bacterial infection diagnosis in newborns. Combining Il-6 with C-reactive protein (CRP) offers an ideal diagnostic tool for neonatal infections.
Area of Science:
- Neonatal Medicine
- Infectious Diseases
- Biomarker Research
Background:
- Early recognition of neonatal infections is crucial for effective treatment and improved outcomes.
- Interleukin-6 (Il-6) is a key cytokine in initiating C-reactive protein (CRP) synthesis, suggesting its potential as an earlier infection indicator.
- This study investigates the hypothesis that Il-6 can be detected earlier than CRP in neonatal bacterial infections.
Purpose of the Study:
- To evaluate the sensitivity and specificity of Interleukin-6 (Il-6) as an early diagnostic marker for neonatal bacterial infections.
- To compare the diagnostic performance of Il-6 with C-reactive protein (CRP) in newborns.
- To assess the combined utility of Il-6 and CRP for early neonatal infection diagnosis.
Main Methods:
- A prospective study involving 298 newborns admitted to a nursery unit.
- Measurement of C-reactive protein (CRP) levels, blood cell counts with differential, and Interleukin-6 (Il-6) levels at admission and 24 hours post-admission.
- Exclusion of 76 newborns due to incomplete or incorrect blood sampling, resulting in a final cohort of 222 newborns.
Main Results:
- Il-6 demonstrated a sensitivity of 73% for blood culture-positive sepsis and 87% for clinical sepsis on admission.
- In infected newborns, Il-6 sensitivity (73%) surpassed CRP sensitivity (58%) on admission.
- Il-6 was 100% sensitive in CRP-negative newborns with blood culture-positive and clinical sepsis, highlighting its early detection capability.
Conclusions:
- Interleukin-6 (Il-6) is a highly sensitive biomarker for the early diagnosis of bacterial infections in neonates.
- The combined use of Il-6 and CRP provides an optimal approach for the early and accurate diagnosis of neonatal infections.
Objective:
Early recognition is important for the successful treatment and outcome of neonatal infections. As interleukin-6 (Il-6) plays a critical role in the induction of C-reactive protein (CRP) synthesis in the liver, it was hypothesized that this cytokine could be detected earlier in blood than the CRP during the course of bacterial infection.
Design:
In a prospective study of 298 newborns who were admitted to the nursery unit, CRP levels, blood cell count with differential, and Il-6 levels were determined at the time of admission and 24 hours after admission. Seventy-six newborns were excluded from the study because of incomplete or incorrect blood sampling.
Results:
The remaining 222 newborns were assigned to one of five groups: 11 newborns with blood culture-positive sepsis (sensitivity of Il-6 on admission 73%), 15 newborns with clinical sepsis (sensitivity of Il-6 on admission 87%), 41 newborns with infection (sensitivity of Il-6 on admission 68%), and 54 newborns without clinical and laboratory evidence of infection (specificity 78%). The remaining 101 newborns were defined as a mixed group because the diagnosis of neonatal infection could not clearly be made. Seventy-five percent of infected newborns had negative Il-6 levels 24 hours after admission. Of the 18 infected newborns with negative Il-6 levels on admission, 10 newborns had elevated CRP levels, suggesting that Il-6 was already negative because of the short half-life of Il-6. Sensitivity of Il-6 in CRP-negative newborns on admission was 100% in newborns with blood culture-positive and clinical sepsis. Il-6 was more sensitive than CRP in infected newborns on admission (73% vs 58%).
Conclusion:
Il-6 is a sensitive parameter for diagnosing neonatal bacterial infection. The combination of CRP and Il-6 seems to be the ideal tool for the early diagnosis of neonatal infection.