Clinical Case Analysis: 7-year-old girl with acute meningeal syndrome

1. Preliminary Diagnosis

— Goldman-Cecil Medicine, p. 4009–4010: "Enteroviruses account for more than 60% of viral meningitides... spread predominantly by the fecal-oral route... CSF shows predominantly lymphocytic pleocytosis, normal glucose, mildly elevated protein."

2. Differential Diagnosis

A. Bacterial (Purulent) Meningitis — Against this diagnosis

B. Tuberculous Meningitis — Against

• TB meningitis has a subacute/chronic onset (weeks), not acute
• CSF glucose is low in TB meningitis (hypoglycorrhachia)
• No TB contact history; no lymphadenopathy mentioned
• This patient: normal glucose, acute onset

C. Bacterial Meningitis (Early phase) — Consider

• In the first 24–48 h of enteroviral meningitis, up to 50% of patients show neutrophilic predominance; but this patient already has 85% lymphocytes, making early bacterial meningitis very unlikely
• No gram-positive/negative organisms on CSF analysis mentioned

D. Meningococcemia with Meningitis — Against

• No petechial/hemorrhagic skin rash
• No marked neutrophilia in blood
• CSF is clear, not turbid

E. Leptospiral / Water-Borne Bacterial Meningitis — Consider

• Leptospirosis can be acquired from contaminated water; can cause aseptic meningitis
• However, leptospirosis typically presents with biphasic illness, jaundice, myalgia, conjunctival suffusion — none of these are present here
• Must be excluded by serology given the epidemiological history

— Goldman-Cecil Medicine, p. 4010: "Epidemiologic considerations and clinical findings aid in distinguishing leptospiral, Lyme Borrelia, and syphilitic meningitis, whereas hypoglycorrhachia suggests tuberculous and cryptococcal meningitis."

3. Investigation Plan

Mandatory (confirmatory):

Etiological workup (epidemiological context — pond exposure):

Additional:

4. Treatment Plan

Hospitalization: Required (neurology/infectious disease ward)

Regimen (supportive — since this is viral):

• Ibuprofen 10 mg/kg/dose every 6–8 hours OR paracetamol 15 mg/kg/dose every 4–6 hours — for fever and headache

• Furosemide 1–2 mg/kg IV/IM OR
• Acetazolamide 10–15 mg/kg/day (reduces CSF production)
• Careful fluid restriction to 75% of maintenance if signs of SIADH

• Antiemetics (metoclopramide 0.1 mg/kg/dose IV if vomiting is severe)
• Analgesics for headache

• No specific antiviral approved for enteroviral meningitis
• If HSV meningitis cannot be excluded: Acyclovir 500 mg/m²/dose IV q8h × 14–21 days pending PCR results
• Once PCR confirms enterovirus, acyclovir can be discontinued

• Antibiotics are not indicated (unless bacterial meningitis cannot be excluded pending cultures — empirical antibiotics may be started and stopped once cultures negative)
• Corticosteroids are NOT indicated for viral meningitis (indicated only for bacterial meningitis)

— Goldman-Cecil Medicine, p. 4010: "Most cases of viral meningitis are self-limited and require only supportive treatment." — Textbook of Family Medicine: "Children seem to recover within 1 to 2 weeks."

5. Prophylaxis and Anti-Epidemic Measures

Regarding the patient:

• Isolation: Standard/contact precautions during hospitalization (enteroviruses shed in feces and respiratory secretions)
• Mandatory notification to public health authorities (infectious disease reporting)
• Stool and throat swabs from close contacts if outbreak suspected

Environmental / Community measures:

• Ban or warning against swimming in the implicated pond pending water quality testing
• Sanitary-epidemiological investigation of the water body — test for enteroviral contamination
• Water quality monitoring (coliform/enteroviral indices)
• Notify local public health/sanitary authority (Rospotrebnadzor or equivalent)

Personal preventive measures:

• Avoid swimming in open water bodies of unknown quality, especially during summer outbreaks
• Hand hygiene (soap and water — essential, as enteroviruses are resistant to alcohol-based gels at standard concentrations)
• Fecal-oral route prevention: food hygiene, handwashing after toilet use

Vaccination:

• No licensed vaccine available against enteroviruses in most countries (EV71 vaccine available in some Asian countries)
• Ensure routine childhood immunizations are up to date (includes poliovirus, mumps — both causes of aseptic meningitis)

Contact tracing:

• Identify other children/adults who swam in the same pond
• Monitor contacts for 7–14 days (enteroviral incubation 2–7 days, up to 14 days)
• If additional cases found — declare local outbreak

1. Preliminary Diagnosis

2. Differential Diagnosis

3. Investigation Plan

• CSF PCR (enterovirus, HSV-1/2)
• CSF Gram stain + bacterial culture
• Blood culture ×2
• Throat + rectal swabs (enterovirus)
• Leptospira serology (water exposure)
• CBC, biochemistry, urinalysis
• MRI brain (if neurological deterioration)

4. Treatment Plan

• Hospitalization, bed rest
• Antipyretics: Ibuprofen 10 mg/kg or Paracetamol 15 mg/kg
• Dehydration/ICP reduction: Furosemide 1–2 mg/kg
• Antiemetics if needed (metoclopramide)
• Acyclovir IV (pending HSV PCR; stop if enterovirus confirmed)
• No antibiotics, no corticosteroids (not indicated for viral meningitis)
• Prognosis: full recovery in 1–2 weeks

5. Prophylaxis & Anti-Epidemic Measures

• Isolate patient (contact precautions)
• Report to public health authorities
• Close the pond pending water quality testing
• Identify/monitor other contacts who swam there (incubation 2–14 days)
• Hand hygiene (soap and water — enteroviruses resist alcohol gel)
• Ensure routine vaccinations current (poliovirus, mumps)

Treatment — 7 y/o, 15 kg, Viral Meningitis

• 15 mg/kg × 15 = 225 mg PO/PR q6h

• 10 mg/kg × 15 = 150 mg PO q8h (with food)

• 1 mg/kg × 15 = 15 mg IV once daily

• 0.1 mg/kg × 15 = 1.5 mg IV q8h (max 3 days)

• 500 mg/m² q8h IV → BSA ≈ 0.64 m² → ~320 mg IV q8h × 14 days
• Stop if PCR confirms enterovirus

• Maintenance = 1250 ml/day → give 940 ml/day (D5% + 0.45% NaCl)

⚠️ No antibiotics. No corticosteroids. Reassess daily; if CSF/blood cultures negative at 48–72h → fully supportive care only.