Lepidopterism caused by the puss caterpillar.

Lepidopterism is a term inclusive of cutaneous and systemic reactions resulting from moths, butterflies, and larva. The puss caterpillar is the larval form of the southern flannel moth, Megalopyge opercularis. A case presentation is reviewed and treatment options presented for contact with puss caterpillars and other stinging caterpillars encountered in the primary care setting.