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C-reactive protein pediatric infection interpretation elevated CRP official guidance
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C-reactive protein pediatric infection
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For this 3-year-old child, the main abnormal result is:
- CRP: 23.1 mg/L (lab range 0-5)
This is elevated and indicates active inflammation, commonly from an infection. It cannot by itself determine whether the infection is viral or bacterial, or identify its location. Doctors interpret it alongside fever duration, cough/cold symptoms, throat/ear/chest examination, urine symptoms, and the child's overall appearance. MedlinePlus explains CRP interpretation.
CBC interpretation using pediatric context
The printed reference ranges appear mostly adult ranges, so some flagged values are not necessarily abnormal for a 3-year-old.
| Test | Result | Interpretation |
|---|---|---|
| Hemoglobin | 12.4 g/dL | Usually normal for a 3-year-old. The lab's 14-18 range is an adult male range. |
| TLC/WBC | 4,400/µL | Low-normal or mildly low for age, depending on the pediatric lab range. This may occur with viral illness. |
| Neutrophils | 70% | Upper end of range. Absolute neutrophil count is about 3,080/µL, which is generally acceptable. |
| Lymphocytes | 22% | Percentage is low for this age, but more useful is absolute lymphocyte count: about 970/µL, which can be temporarily reduced during acute illness. |
| Platelets | 2.14 lakh/µL | Normal. |
| PCV/HCT | 39% | Generally normal for a young child. |
| MCV | 85.3 fL | Normal. |
| MCH 26.9, MCHC 31.8 | Borderline low by this lab’s adult ranges, but do not show definite anemia here because hemoglobin and MCV are normal. Iron studies are only needed if the pediatrician suspects iron deficiency based on diet, growth, pallor, or repeat CBC. |
What this means
This report is compatible with a current inflammatory/infectious illness, but it does not establish a diagnosis or automatically mean antibiotics are required. CRP and WBC results alone cannot reliably separate viral from bacterial illness in children. The pediatrician who examined him should decide based on symptoms and examination findings.
Seek urgent medical care now if he has
- difficulty or fast breathing, bluish lips, chest indrawing
- unusual sleepiness, confusion, persistent irritability, or is difficult to wake
- inability to drink, repeated vomiting, very little urine, dry mouth/no tears
- seizure, stiff neck, non-blanching purple rash
- fever persisting more than 3 days, or worsening overall condition
Please follow up with the treating pediatrician, especially if fever or symptoms are continuing. The elevated CRP may be repeated only if the clinician feels it will change management.
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