Two to three million people in the United States
are severely allergic to the venom of stinging insects.
About 100 deaths each year in the United States are
attributed to insect stings and bites. Hymenopterous
insects (ants, wasps, bees, hornets and yellow jackets)
cause more severe allergic reactions than do other insects.
However, spiders such as the brown recluse
and the black widow are also poisonous. The nettling
caterpillars such as the larvae of the saddleback moth,
io moth, the hag moth, and the flannel moth can inflict
a painful reaction upon contact. Hypersensitive individuals
may experience swelling, nausea, and generalized
systemic reactions. Ants, particularly the imported
fire ant, can inflict a painful sting that will result
in a pustule at the sting site.