Which laboratory test serves as an inflammatory marker commonly used in neonatal sepsis evaluation?

Which laboratory test serves as an inflammatory marker commonly used in neonatal sepsis evaluation?

• A. C-reactive protein
• B. Hematocrit
• C. Amylase
• D. Gamma-glutamyl transferase

Answer: (A)

In neonatal sepsis evaluation, the inflammatory biomarker most commonly used is C-reactive protein. CRP is an acute-phase protein produced by the liver in response to inflammatory cytokines during infection. It rises relatively early—often within 6 to 12 hours of an infectious process and peaks around 24 to 48 hours—making it helpful for both initial assessment and monitoring response to therapy. Serial measurements help clinicians see trends: decreasing CRP over time supports improvement, while persistently high or rising CRP can indicate ongoing inflammation or infection and may guide decisions about continuing or adjusting antibiotics. It's important to remember CRP isn’t specific to infection, so it’s interpreted alongside clinical signs, blood cultures, and other labs. Hematocrit, amylase, and gamma-glutamyl transferase are not inflammatory markers. Hematocrit reflects red cell volume and can be affected by volume status and anemia; amylase relates to pancreatic enzymes; gamma-glutamyl transferase is a liver enzyme. None of these serve as primary indicators of inflammatory or infectious processes in newborns.

In neonatal sepsis evaluation, the inflammatory biomarker most commonly used is C-reactive protein. CRP is an acute-phase protein produced by the liver in response to inflammatory cytokines during infection. It rises relatively early—often within 6 to 12 hours of an infectious process and peaks around 24 to 48 hours—making it helpful for both initial assessment and monitoring response to therapy. Serial measurements help clinicians see trends: decreasing CRP over time supports improvement, while persistently high or rising CRP can indicate ongoing inflammation or infection and may guide decisions about continuing or adjusting antibiotics. It's important to remember CRP isn’t specific to infection, so it’s interpreted alongside clinical signs, blood cultures, and other labs.

Hematocrit, amylase, and gamma-glutamyl transferase are not inflammatory markers. Hematocrit reflects red cell volume and can be affected by volume status and anemia; amylase relates to pancreatic enzymes; gamma-glutamyl transferase is a liver enzyme. None of these serve as primary indicators of inflammatory or infectious processes in newborns.