A boy died in an emergency room with white froth in the mouth. The poisoning is due to -
Froth near the mouth or nasal aperture may be due to death by drowning or some poisons like opium or organophosphorus.
Blood mixed frothing from nose and mouth may be due to organophosphorus poisoning.
Death due to drowning or opium poisoning causes fine white copious leathery frothing.
Organophosphorus
Opium
HCN
None