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Arachnids include arthropods such as spiders, scorpions, mites, and ticks.

NIOSH Workplace Safety & Health Topics - Venomous spiders – overview of poisonous spiders with recommendations for protecting workers

Pictorial Keys to Arthropods, Reptiles, Birds, and Mammals of Public Health Significance – pictorial keys used to teach animal identification to personnel (sanitarians, engineers, physicians, veterinarians, etc.) without special training in taxonomy

Links to information from outside CDC

Arachnology, International Study of Spiders (Berlin) – international society devoted to arachnology

Black Widow (The University of Ohio Extension) – fact sheet about the widow spider species in the United States

Brown Recluse Spider (OSHA - Occupational Safety and Health Association) – factsheet on the Brown Recluse Spider

Brown Recluse and Other Recluse Spiders (University of California Davis) – document on recluse spiders

Canadian National Collection of Insects, Arachnids, and Nematodes (CanaColl Foundation, Canada) – collection used to identify and classify organisms and as a database supporting agricultural research

Entomology-Spiders and Other Arachnids (University of California Riverside) – research and extension service on spiders and other arachnids

Other Common Household Spiders (The University of Ohio Extension) – fact sheet about spiders in and around the house

Pests of Homes, Structures, People, and Pets (The University of California - IPM Online) – spider management guidelines

Tarantula (Arizona-Sonora Desert Museum) – fact sheet about tarantulas

Wolf Spider (Oklahoma State University) – information about wolf spiders

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