A Three-Year-Old With Watery Diarrhoea, Fourteen Kilometres From the PHC
A three-year-old child in a village near Balasore has passed watery stools eight times in 24 hours and vomited twice. The mother has one ORS packet, clean water from a hand pump, a kettle, and a leftover antibiotic sachet from a cousin's earlier treatment. On examination the child is irritable but alert, drinks eagerly when offered water, has slightly sunken eyes, a dry mouth, and a skin pinch that retracts in about 1.5 seconds. There is no blood in the stool. The nearest primary health centre is 14 km away and the last bus has already gone. The child weighs about 12 kg. The mother asks whether she should give the antibiotic and whether the ORS should be made stronger so it works faster.
1. Classify the child's dehydration and state the correct fluid plan, including the volume for this child.
Read the worked answer
Some dehydration - Plan B, oral rehydration.
The signs support this: sunken eyes, dry mouth, skin pinch 1.2–2 s, irritability, and eager drinking. Severe dehydration would show lethargy or unconsciousness, inability to drink, and a skin pinch over 2 s. No dehydration would show none of the above.
Plan B: ORS approximately 75 mL per kg body weight over 4 hours.
For 12 kg: 75 × 12 = 900 mL over 4 hours, i.e. about 225 mL per hour, given by spoon or cup in small frequent sips; continue breastfeeding or normal feeds alongside. Vomiting is not a reason to stop - pause 10 minutes, then resume slowly, because most of the fluid is still absorbed.
Reassess at 4 hours: if the eyes are normal, mouth moist, and skin pinch < 1.2 s, switch to Plan A (extra fluids after every loose stool). If the child becomes lethargic or stops drinking, treat as severe and arrange urgent transfer for IV fluids.
2. Respond to the mother's two questions: should she use the leftover antibiotic, and should she make the ORS stronger?
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No to both, and explain why in plain terms.
Antibiotic: Acute watery diarrhoea without blood is usually viral or toxin-mediated and clears with fluid replacement. Antibiotics do not shorten it; they can cause additional diarrhoea, and a leftover course with an unknown drug name and expiry is doubly unsafe. Antibiotics are indicated for bloody diarrhoea, suspected cholera with severe dehydration, and specific diagnosed infections - none of which fit here. Tell the mother to bring the sachet to the PHC rather than use it.
Stronger ORS: Concentration matters. One standard packet is made up in exactly 1 litre of clean water. Making it stronger raises the sodium and glucose concentration above the absorption optimum and can worsen dehydration by drawing water into the gut, and in a small child risks hypernatraemia. Too weak is also wrong - it fails to replace sodium.
Also advise: do not add extra sugar or salt to the made-up solution; discard any solution after 24 hours; continue zinc supplementation for 14 days if available, as it shortens the episode and reduces recurrence.
3. Which change in the child's condition would make you stop home treatment and carry the child 14 km at night?
Read the worked answer
Any sign of severe dehydration or of a non-diarrhoeal cause.
Go now if the child:
- becomes lethargic, floppy, or difficult to wake (the single most important change);
- is unable to drink or refuses all fluids;
- has a skin pinch that retracts in more than 2 seconds, or deeply sunken eyes;
- passes no urine for 6–8 hours;
- develops blood in the stool or high fever;
- starts vomiting everything and cannot keep even small sips down;
- breathes fast or deeply, or has cold hands and feet with a weak, fast pulse.
Reasoning: these are signs of severe dehydration or shock, which need intravenous fluids that cannot be given at home. Sunset does not change the clinical threshold - a night journey is safer than waiting, because severe dehydration can progress within hours, particularly in a 12 kg child. If none of these signs appear, continue ORS at home and go to the PHC at first light.