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Acute Gastroenteritis — 8-Year-Old Male

Clinical Summary

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Most Likely Diagnosis

• Greenish, mucoid, foul-smelling stools → suggests intestinal inflammation (dysentery-like picture)
• Fever → systemic inflammatory response (more common in bacterial vs. viral)
• Vomiting → upper GI involvement

Top Differential Diagnoses

Greenish color of stool often indicates rapid intestinal transit or bile pigment — consistent with bacterial gastroenteritis or early dysentery.

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Immediate Assessment

1. Dehydration Status (WHO Grading)

2. Danger Signs (Admit Immediately if Present)

• Inability to drink/breastfeed
• Persistent vomiting (all feeds)
• Bloody stools
• High fever (>39°C) with toxic appearance
• Signs of severe dehydration or shock
• Altered sensorium

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Management

A. Rehydration — FIRST Priority

"Reduced osmolarity ORS is recommended as first-line therapy of mild to moderate dehydration in infants, children, and adults with acute diarrhea from any cause (strong, moderate)."

• Zinc supplementation: 20 mg/day × 14 days (WHO recommendation for children >6 months) — reduces duration and severity of diarrhea.

B. Antiemetics

"Ondansetron may be given to facilitate tolerance of oral rehydration in children >4 years of age with acute gastroenteritis associated with vomiting (weak, moderate)."

• Ondansetron: 0.15 mg/kg/dose PO/IV (max 4 mg/dose) — to facilitate ORS tolerance.
• Avoid: metoclopramide in children (extrapyramidal side effects).

C. Antimotility Agents

"Antimotility drugs (eg, loperamide) should NOT be given to children <18 years of age with acute diarrhea (strong, moderate)."

D. Antipyretics

• Paracetamol (acetaminophen): 15 mg/kg/dose every 4–6 hours PRN for fever/discomfort.
• Avoid ibuprofen if signs of dehydration (risk of renal impairment).

E. Antibiotics — Guided by Etiology

Empirical antibiotic therapy with Azithromycin can be considered in a child with mucoid/febrile diarrhea pending stool culture, especially if clinical features suggest bacterial dysentery.

F. Nutrition

• Do NOT starve the child — continue age-appropriate feeding as tolerated.
• Offer small, frequent, easily digestible meals (banana, rice, curd, boiled vegetables).
• Avoid: high-sugar drinks, fatty foods, carbonated beverages.
• Resume normal diet as soon as tolerated.

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Investigations

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Red Flags — Escalate Care

• Bloody stools or worsening mucus
• High swinging fever >39°C not responding to antipyretics
• No urine output for >6 hours
• Worsening lethargy or confusion
• Severe abdominal distension or tenderness
• Failure of oral rehydration

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Summary Plan

1. Assess dehydration → Start ORS immediately
2. Ondansetron for vomiting to allow ORS tolerance
3. Zinc 20 mg/day × 14 days
4. Paracetamol for fever
5. Stool microscopy + culture — guided antibiotic therapy
6. Empirical Azithromycin if features of bacterial dysentery
7. Continue feeding — no starvation
8. Parental education on hand hygiene, ORS preparation, danger signs

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Drug Dosages — 8-Year-Old (~22 kg)

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1. Paracetamol (Acetaminophen)

At 8 years, tablets (500 mg, ½ tablet) are generally well-tolerated. Syrup (250 mg/5 mL) is also acceptable if the child prefers liquid.

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2. Azithromycin

Syrup (200 mg/5 mL) is the most practical and accurate for this age. Tablets are fine if the child can swallow them.

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3. Ciprofloxacin

⚠️ Note: Ciprofloxacin is a fluoroquinolone — generally avoided in children due to concerns about cartilage/joint toxicity. However, it is accepted in specific indications (e.g., resistant Shigella, typhoid, when benefits outweigh risks) as a short course.

250 mg tablet BD or 250 mg/5 mL suspension 5 mL BD is the most practical option.

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Quick Prescription Summary

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Clinical note: Avoid using both Azithromycin and Ciprofloxacin together unless there is a specific dual indication. For empirical bacterial gastroenteritis/dysentery in a child, Azithromycin alone is the preferred first-line agent. Ciprofloxacin is reserved for resistant cases or culture-guided therapy.