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Common Diseases: Cholera and Dehydration
Concepts tested here
- Oral rehydration
All Questions
2000 AIPMT 1 question
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Saline solution is given to patients of cholera because :Cholera causes severe watery diarrhoea, so the body loses a lot of water and salts (especially $Na^+$), leading to dehydration.
Saline (salt and water, often with glucose as ORS) replaces the lost water and salts. Sodium ions help retain water in the body (by osmosis) and restore the fluid balance.
So saline is given because $Na^+$ prevents water loss from the body.