Clinical Assessment & Management Plan

Patient Summary

Step 1: Immediate Stabilization & Investigations

Investigations to Order Urgently

• CSF PCR panel: HSV-1, HSV-2, VZV, EBV, CMV, Enterovirus, West Nile virus
• CSF autoimmune panel: Anti-NMDAR, Anti-VGKC, Anti-LGI1, Anti-CASPR2 antibodies
• MRI Brain with contrast: Look for temporal lobe involvement (HSV), cerebellar changes
• EEG: Rule out subclinical seizures
• Blood cultures, CBC with differential, CRP, ESR, Procalcitonin
• HbA1c, fasting glucose, renal function (diabetes management, drug dosing)
• Blood pressure monitoring (hypertension control)
• Skin lesion biopsy/swab (hand rash — rule out HSV/VZV dermatitis)

Step 2: Empirical Treatment (Start Immediately — Do Not Wait for Results)

A. Antiviral Therapy (FIRST PRIORITY)

HSV encephalitis with skin vesicles or rash must be treated empirically without delay — mortality without treatment exceeds 70%.

• Acyclovir IV — 10 mg/kg every 8 hours for 14–21 days
  • Adjust dose for renal function (common concern in diabetic/hypertensive patients)
  • Monitor renal function (serum creatinine, urine output) closely during IV acyclovir — it is nephrotoxic
  • Ensure adequate IV hydration to reduce nephrotoxicity

B. Antibacterial Coverage (If Bacterial Meningitis Not Excluded)

• Ceftriaxone 2g IV every 12 hours + Dexamethasone 0.15 mg/kg IV every 6 hours (first dose before or with first antibiotic)
• Can be de-escalated once CSF PCR results confirm viral/autoimmune etiology

C. Autoimmune Encephalitis (If CSF/MRI supports it or antibodies come back positive)

• IV Methylprednisolone 1g/day for 5 days (first-line immunotherapy)
• If no response: IVIg 0.4 g/kg/day × 5 days OR Plasma exchange
• Second-line (refractory): Rituximab or Mycophenolate mofetil

Step 3: Symptomatic Management

Ataxia & Balance Disorder

• Physiotherapy — gait training, balance rehabilitation (primary intervention; no specific drug reverses ataxia)
• Occupational therapy for ADL support
• If tremor is present: Clonazepam (low dose, cautious in encephalopathic patients)
• Treat the underlying cause (antiviral/immunotherapy) — ataxia may resolve with cause-specific treatment

Body Stiffness (Rigidity)

• If encephalitis-related rigidity: treat underlying encephalitis
• Baclofen (muscle relaxant) if needed for symptomatic relief
• If autoimmune (e.g., anti-NMDAR or anti-GABA-B encephalitis): immunotherapy is key

Hand Allergy/Rash

• If herpetic: covered by acyclovir IV
• If contact dermatitis: Topical hydrocortisone (mild) or oral antihistamine
• Avoid high-potency steroids on infected skin if herpetic lesions are present

Step 4: Comorbidity Management

Diabetes Mellitus

• Switch to IV insulin infusion (sliding scale or basal-bolus) during acute illness
  • Oral hypoglycemics (especially Metformin) must be held during IV acyclovir use due to renal risk
• Target blood glucose: 140–180 mg/dL (inpatient ICU range)
• Monitor glucose every 4–6 hours

Hypertension

• IV Labetalol or Hydralazine if BP is acutely elevated (>180/120 mmHg)
• Continue existing antihypertensives orally if patient can swallow, otherwise switch to IV equivalents
• Avoid abrupt BP drops — cerebral autoregulation may be impaired in encephalitis

Anemia (Hb 10.9 g/dL)

• Mild anemia — likely anemia of chronic disease or nutritional
• Iron studies, B12, folate levels — treat deficiency if found
• Oral iron supplementation if iron-deficient
• Transfusion not indicated at this level unless symptomatic or Hb drops further

Step 5: Supportive & Monitoring

Summary Treatment Algorithm

ADMIT TO ICU / High Dependency Unit
        ↓
Acyclovir IV 10 mg/kg q8h (IMMEDIATE)
        ↓
Ceftriaxone + Dexamethasone (until bacterial meningitis excluded)
        ↓
CSF PCR / Autoimmune antibody panel results
        ↓
If HSV/VZV → Continue Acyclovir 14–21 days
If Autoimmune → IV Methylprednisolone / IVIg
If Bacterial → Adjust antibiotics per sensitivity
        ↓
Physiotherapy for ataxia + balance rehabilitation
        ↓
Tight glycemic control + BP management + Anemia workup

Key Clinical Cautions in This Patient

1. Acyclovir is nephrotoxic — mandatory dose adjustment and monitoring in a hypertensive diabetic with likely baseline renal vulnerability
2. Corticosteroids worsen diabetes — if methylprednisolone is started for autoimmune encephalitis, anticipate hyperglycemia and intensify insulin therapy
3. Normal CSF protein (37 mg/dL) does not exclude encephalitis — early viral or autoimmune encephalitis can show normal or mildly elevated CSF
4. The combination of rash + ataxia + encephalitis strongly suggests VZV (Varicella-Zoster Virus) — cover with acyclovir empirically