Which of the following is the most common cause of poisoning deaths in children below 5 years of age in India?

Explanation

## Epidemiology of Poisoning in Young Children **Key Point:** Organophosphate poisoning is the leading cause of poisoning-related mortality in children under 5 years in India, accounting for approximately 40–50% of all poisoning deaths in this age group. ### Why Organophosphates? - **Accessibility:** Widely available as pesticides and insecticides in agricultural and household settings across India. - **Accidental ingestion:** Young children explore their environment orally; pesticide containers are often stored unsafely. - **Severity:** Even small quantities can cause severe cholinergic crisis (SLUDGE syndrome: Salivation, Lacrimation, Urination, Defecation, GI upset, Emesis) leading to respiratory failure and death. - **Delayed recognition:** Parents may not immediately recognize the exposure, delaying treatment. ### Mechanism of Toxicity Organophosphates irreversibly inhibit acetylcholinesterase, leading to accumulation of acetylcholine at cholinergic synapses and neuromuscular junctions. **High-Yield:** The mortality rate from organophosphate poisoning in children is significantly higher than other common poisonings because: 1. Rapid systemic absorption (especially if aspirated). 2. Respiratory depression from bronchospasm and pulmonary edema. 3. Delayed or inadequate access to antidotes (atropine, pralidoxime) in rural settings. ### Comparative Epidemiology in India | Poison Type | Age Group Most Affected | Mortality Rate | Common Scenario | | --- | --- | --- | --- | | Organophosphate | <5 years | 20–40% | Accidental household/field exposure | | Corrosive | 1–5 years | 5–15% | Accidental ingestion of cleaning agents | | Iron salts | <5 years | <5% | Accidental ingestion of supplements | | Acetaminophen | Variable | <1% | Therapeutic overdose | [cite:Park 26e Ch 12] **Clinical Pearl:** In any child presenting with acute onset of excessive salivation, bronchospasm, miosis, and muscle fasciculations, organophosphate poisoning must be ruled out immediately, and atropine should be administered without waiting for confirmatory tests.