The snake's bite, poisonous or not, usually causes horror in the victim, often with vegetative manifestations (eg, nausea, vomiting, tachycardia, diarrhea, sweating), which are difficult to distinguish from systemic manifestations of poisoning.
Out of 3,000 species of existing snakes, only about 15% worldwide and 20% in the US are dangerous to humans, since they have poison or poisonous salivary secretions.
In the United States, most people get bites from different types of Ixodidae mites that attach to a person and, if not removed, feed on it for several days.
There are many kinds of biting ticks. Trombicula irritans is probably the most common. Larvae of this species are common in nature everywhere, except for arid regions.