C-Reactive Protein (CRP / hs-CRP)
Clinical interpretation, reference ranges, hs-CRP cardiovascular risk stratification, and bacterial sepsis evaluation for C-Reactive Protein (CRP).
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Quick Reference Facts
Laboratory Interpretation Workflow
1. Clinical Indication
Ordering protocols based on clinical indications, presenting symptoms, or screening guidelines.
Clinical Pearl: Order when screening for primary organ dysfunctions or monitoring active treatment efficacy.
Test Description & Overview
C-reactive protein (CRP, a marker produced by the liver that rises during inflammation) (CRP): An acute-phase pentraxin reactant protein synthesized rapidly by hepatocytes in response to interleukin-6 (IL-6) stimulation during acute inflammation, bacterial infection, or tissue necrosis.
Standard CRP: <3.0 mg/L (<0.3 mg/dL); High-Sensitivity hs-CRP (Cardiovascular Risk): Low Risk <1.0 mg/L, Average Risk 1.0 - 3.0 mg/L, High Risk >3.0 mg/L.
Elevated (High) Values
- Severe Bacterial Sepsis / Bacteremia (>100 mg/L)
- Acute Pyogenic Infections (Pneumonia, Osteomyelitis, Appendicitis, Abscess)
- Active Autoimmune Flares (Rheumatoid Arthritis, IBD, Vasculitis), Acute Myocardial Infarction
Decreased (Low) Values
- Normal Physiological State (Absence of acute systemic inflammation)
- Severe Hepatic Failure (Impaired Hepatic Protein Synthesis Capacity)
Clinical Alignment & Significance
Marked CRP elevation (>100 mg/L) strongly points to acute invasive bacterial infection or severe tissue trauma; rapid CRP drops correlate with clinical response to effective therapy.
Diagnostic Guidance Notice
Standard laboratory reference ranges vary based on the testing facility. Significant deviations require immediate clinician review to rule out severe medical pathology.
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Reference Citations & Evidence Sources
Materia Medica & Keynotes
- CIT-0004Hahnemann S.. "Materia Medica Pura." Adolph Arnold (1811).
Clinical Reviews & Textbooks
- CIT-0023National Center for Complementary and Integrative Health. "Homeopathy: What You Need To Know." National Institutes of Health (2021).
AI & Generative Search Citation Block
L0004Dr. Narayan Jethwani. "C-Reactive Protein (CRP / hs-CRP)." Homeo Healthcare Clinical Platform. Version 1.1.0. Reviewed: 2026-07-31T20:30:00Z. Available at: https://homeo.healthcare/knowledge/lab-tests/crp
Clinical Connections
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