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Recurring fever with chillness and body pain
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CBC Report Analysis + Clinical Assessment
Date of test: 13/07/2026 | Patient: Manisha
CBC Results Summary
| Parameter | Value | Normal Range | Status |
|---|---|---|---|
| RBC | 3.62 × 10⁶/µL | 3.50 - 5.50 | Normal |
| HGB (Hemoglobin) | 12.9 g/dL | 11.5 - 16.5 | Normal (low-normal) |
| HCT (Hematocrit) | 35.4% | 35.0 - 55.0 | Normal (borderline low) |
| MCV | 97.0 fL | 75.0 - 100.0 | Normal (high-normal) |
| MCH | 35.5 pg | 25.0 - 35.0 | Slightly HIGH ⚠️ |
| MCHC | 36.3 g/dL | 31.0 - 38.0 | Normal |
| WBC | 6.0 × 10³/µL | 3.5 - 10.0 | Normal |
| PLT (Platelets) | 400 × 10³/µL | 100 - 400 | Borderline HIGH ⚠️ |
| LYM% | 37.7% | 15.0 - 50.0 | Normal |
| GRAN% | 50.6% | 35.0 - 80.0 | Normal |
Key CBC Observations
-
Hemoglobin 12.9 g/dL with HCT 35.4% - These are low-normal for a female adult. Combined with the borderline elevated MCV (97 fL) and elevated MCH (35.5 pg), this pattern suggests the red cells are slightly larger and more hemoglobin-rich than average. This can point to early nutritional deficiency (Vitamin B12 or folate deficiency), or it may simply be within that individual's normal variation.
-
Platelets at 400 × 10³/µL - Sitting at the upper limit of normal, flagged by the analyzer. Borderline reactive thrombocytosis can occur with infection or inflammation.
-
WBC is completely normal (6.0) - This is an important finding. Classic bacterial infections typically drive the WBC up. A normal WBC with recurring fever, chills, and body pain is more characteristic of:
- Malaria (most common in India)
- Dengue
- Viral infections
- Rickettsial infections (typhus)
Most Likely Diagnoses Given the Symptoms
Recurring fever + chills + body pain is a classic presentation. In India, the top considerations are:
1. Malaria (Most Important to Rule Out First)
The hallmark of malaria is paroxysmal, recurring fever with chills and sweats, repeating in cycles (every 48-72 hours depending on species). As described in Sherris & Ryan's Medical Microbiology, malaria begins with "fevers accompanied by headache, chills, sweats, and malaise, typically appearing in paroxysmal episodes lasting hours and recurring for weeks."
- Normal WBC is consistent with malaria (parasites don't directly drive neutrophilia)
- The low-normal hemoglobin is consistent - malaria causes hemolysis
- Platelet count in malaria often drops; here it is borderline, but this CBC was taken 13 July - could be early in the infection
This CBC does NOT rule out malaria. A peripheral blood smear and/or rapid malaria antigen test (RDT) is the mandatory next step.
2. Dengue
Dengue also causes recurring fever, severe body aches ("breakbone fever"), and chills. Dengue typically causes falling platelet counts - the borderline-high platelet here makes early dengue possible but a dropping trend would be expected. A NS1 antigen test and dengue IgM/IgG would confirm.
3. Viral/Flu-like Illness
Influenza or other viral fevers cause fever, chills, myalgia, and normal CBC.
4. Typhoid
Typhoid fever can present with recurring fever and body pain, though it tends to be more gradual. A Widal test or blood culture would be needed.
What Tests Should Be Done Urgently
Given the symptoms and this CBC, the following tests are recommended - go to a doctor today or tomorrow morning:
| Test | Purpose |
|---|---|
| Peripheral Blood Smear (thick & thin) | Gold standard for malaria diagnosis |
| Malaria RDT (Rapid Antigen Test) | Quick bedside/lab test for malaria |
| Dengue NS1 Antigen + IgM/IgG | Rule out dengue |
| Widal Test or Typhidot | Rule out typhoid |
| Serum Bilirubin | If malaria suspected - hemolysis check |
| Vitamin B12 + Folate level | For the elevated MCH/MCV |
What to Watch For - Seek Emergency Care Immediately If:
- Fever goes very high (>104°F / 40°C) with confusion or drowsiness
- Severe headache with neck stiffness
- Difficulty breathing
- Very low urine output
- Platelet count drops sharply on repeat CBC (dengue warning sign)
- Jaundice (yellowing of eyes/skin)
Important disclaimer: This analysis is for educational and informational purposes only. The CBC result and symptom pattern described require in-person clinical evaluation. Please consult a doctor as soon as possible - a blood smear for malaria is urgent and inexpensive, and these symptoms should not be left uninvestigated.
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