Question

A 6-year-old child with culture-proven Salmonella septicemia presents in cardiogenic shock. Ceftriaxone therapy has already been initiated. What is the next best step in management?

• A. Add dexamethasone
• B. Add azithromycin
• C. Switch to ampicillin-sulbactam
• D. No additional therapy required

Hint:

Indication of Dexamethasone in Typhoid Fever: Severe typhoid presenting with altered sensorium (delirium/coma/stupor) or shock. Dose: $3\text{ mg/kg}$ loading, then $1\text{ mg/kg}$ q6h for 48 hours.

Answer 1

The Correct Option is A

Concept:
Severe enteric (typhoid) fever can be complicated by severe septic/cardiogenic shock, altered mental status, stupor, or delirium, carrying substantial mortality.
High-dose adjunctive corticosteroid therapy alongside effective bactericidal antibiotics is proven to reduce mortality in severe, complicated typhoid state shock.
Explanation:
• Severe typhoid fever is mediated by a hyperinflammatory cytokine storm triggered by endotoxin and macrophage activation during systemic bacteremia.

• Landmark clinical trials have demonstrated that adding high-dose intravenous dexamethasone to standard antimicrobials significantly reduces mortality in severe typhoid fever associated with shock, coma, delirium, or stupor.

• The recommended regimen consists of intravenous dexamethasone: an initial loading dose of $3\text{ mg/kg}$ infused over 30 minutes, followed by $1\text{ mg/kg}$ every 6 hours for an additional 48 hours (total of 8 doses).

• Third-generation cephalosporins (such as ceftriaxone) remain the antimicrobial backbone; switching or substituting antibiotics is unnecessary when the organism is responsive and already on effective coverage.

• Dexamethasone acts by blunting the massive systemic release of pro-inflammatory cytokines, including TNF-$\alpha$, IL-1, and IL-6, which drive systemic vasodilation and myocardial depression.
Final Answer:
In severe culture-proven Salmonella septicemia complicated by shock or encephalopathy, adding high-dose intravenous dexamethasone is the next best life-saving step.