Reported exposures
AAPCC NPDS recorded roughly 3,500–4,500 calls per year for spider envenomation across the last decade. The large majority were minor; severe outcomes are rare and fatalities essentially absent.
Caveats
These are calls, not verified bites. Many entries are 'presumed bites' with no captured spider. Treat the figures as upper bounds for true bite incidence.
References
- [1]Annual Report of the American Association of Poison Control Centers - AAPCC NPDS. Accessed June 2026.
Related in Data
- Spider species richness by stateDocumented species counts per US state aggregate from state extension publications and museum records.
- Medically significant spiders in the USOnly two genera in the United States produce envenomation of significant clinical consequence: Latrodectus (widows) and Loxosceles (recluses)..
- Verified Loxosceles range (United States)Established populations of native Loxosceles species in the United States, based on museum specimens and verified field collections compiled by Vetter and collaborators..
- Latrodectus species distribution (United States)Native Latrodectus species occupy distinct overlapping ranges across the United States: L.
- Seasonality of indoor spider encountersIndoor sightings of large synanthropic spiders peak in late summer and early autumn in most US regions, driven primarily by male search activity rather than population growth..
- Poison control call trends (United States)AAPCC NPDS data show a steady ~3,500–4,500 annual calls coded for spider exposure across the past decade, with the majority classified as minor and fatalities essentially absent in recent reporting years..