What type of poisoning occurs when a hiker is bitten by a rattlesnake?

When a hiker is bitten by a rattlesnake, the type of poisoning that occurs is classified as poison by injection. Rattlesnakes deliver their venom through their fangs directly into the bloodstream of their victim, which is characteristic of injected poisons. This method allows the venom to quickly affect the body, potentially leading to severe physiological reactions.

Venomous snakes like rattlesnakes have evolved this form of envenomation as a means of subduing their prey and for defense. When a snake bites, it injects venom that can cause pain, swelling, and systemic effects, depending on the type and amount of venom injected.

In contrast, other forms of poisoning such as absorption involves toxins entering the body through the skin or mucous membranes, inhalation relates to breathing in poisonous gases or vapors, and ingestion pertains to consuming toxic substances orally. None of these methods apply to a rattlesnake bite, as it is specifically a direct injection of venom into the body.