A 28-year-old woman from a coastal village in West Bengal presents with acute onset of watery diarrhea, abdominal cramping, and vomiting for 8 hours. She attended a community feast where seafood was served. On examination, she is severely dehydrated (BP 70/40, HR 130/min, skin turgor loss). Stool culture on TCBS agar grows oxidase-positive, gram-negative curved rods. The isolate is confirmed as Vibrio cholerae O1 Ogawa serotype. Which of the following is the most appropriate immediate management?

Explanation

## Cholera Management: Severe Dehydration with Shock ### The Clinical Priority: IV Fluids First in Shock **High-Yield:** In cholera with **severe dehydration and hemodynamic compromise** (BP 70/40 mmHg, HR 130/min), **immediate intravenous fluid resuscitation** is the most appropriate first-line intervention. ORT is the gold standard for mild-to-moderate dehydration, but it is contraindicated or insufficient when the patient is in hypovolemic shock. ### WHO Classification of Dehydration in Cholera | Severity | Features | Management | |---|---|---| | **No dehydration** | No signs | ORS at home | | **Some dehydration** | Thirsty, restless, sunken eyes, reduced skin turgor | ORT (Plan B): 75 mL/kg over 4 hours | | **Severe dehydration** | Shock (low BP, rapid weak pulse), unconscious/lethargic, unable to drink | **IV fluids immediately (Plan C)** | **Key Point:** This patient has BP 70/40 mmHg and HR 130/min — these are signs of **hypovolemic shock**, placing her in the "severe dehydration" category requiring **Plan C (IV fluids)** per WHO guidelines. ### Why IV Fluids Are Indicated Here 1. **Hemodynamic instability**: BP 70/40 mmHg indicates circulatory collapse — oral intake cannot restore intravascular volume fast enough. 2. **Risk of aspiration**: Vomiting + shock = inability to safely tolerate oral fluids. 3. **Speed of correction**: IV fluids restore circulating volume within minutes; ORT takes hours. 4. **WHO Plan C**: 100 mL/kg Ringer's lactate (preferred) or normal saline over 3 hours (adults); reassess every 15–30 minutes. ### Recommended IV Fluid Regimen (WHO Plan C — Adults) - **Ringer's lactate** (preferred) or **normal saline**: 100 mL/kg total - First 30 mL/kg: infuse as rapidly as possible (within 30 minutes) - Remaining 70 mL/kg: over next 2.5 hours - Reassess after each phase; switch to ORT as soon as patient can drink **Warning:** Option C mentions "dextrose-saline" for maintenance — while the initial resuscitation with normal saline is correct, dextrose-saline is hypotonic and not ideal for maintenance. However, the critical first step — **immediate IV resuscitation** — is correctly identified in option C, making it the best answer among the choices given. ### Why ORT (Option B) Is Incorrect Here **Clinical Pearl:** ORT is first-line for **mild-to-moderate** dehydration. In **severe dehydration with shock**, ORT alone is insufficient and dangerous: - Cannot restore circulating volume rapidly enough. - Patient may be unable to drink due to vomiting and altered perfusion. - Delay in IV resuscitation risks cardiac arrest from hypovolemia. ### Role of Antibiotics **Key Point:** Antibiotics (tetracycline, ciprofloxacin, azithromycin) are **adjunctive** — they shorten illness duration but do NOT replace fluid therapy. Option D (antibiotics without fluids) is dangerous and incorrect. ### Why Option A Is Incorrect Nasogastric feeding with glucose-electrolyte solution is not a standard recommendation for cholera management and does not address the immediate hemodynamic emergency. ## Summary | Option | Assessment | |---|---| | A — Nasogastric feeding | Not recommended; does not address shock | | B — ORT first-line | Correct for mild/moderate; **insufficient in shock** | | **C — Immediate IV fluids** | **CORRECT — WHO Plan C for severe dehydration/shock** | | D — Antibiotics without fluids | Dangerous; adjunctive only | [cite: WHO Guidelines for Cholera Management 2017; Harrison's Principles of Internal Medicine 21e Ch 159; Park's Textbook of Preventive and Social Medicine 26e]