Commodity Fumigation License Practice Exam

What symptom is specifically associated with phosphine poisoning?

1. Seizures

2. Bluish discoloration of skin

3. Nausea

4. Muscle weakness

The correct answer is: Bluish discoloration of skin

Phosphine poisoning is specifically associated with bluish discoloration of the skin, known as cyanosis. This symptom occurs as a result of inadequate oxygenation of the blood, which can be triggered by the toxic effects of phosphine on the respiratory and cardiovascular systems. Phosphine exposure can interfere with cellular respiration by inhibiting cytochrome oxidase, leading to a state where blood cannot efficiently release or transport oxygen to various tissues. As oxygen levels drop, the skin, particularly in areas such as the lips, face, and extremities, can develop a bluish tint indicating hypoxia. This manifests clearly in cases of severe poisoning, distinguishing it from symptoms like seizures, nausea, or muscle weakness, which may also occur but are less definitive for phosphine exposure. The distinct nature of cyanosis as a symptom allows healthcare professionals to identify phosphine poisoning more promptly and take appropriate action to mitigate effects and provide care.