RT Book, Section A1 Smollin, Craig A2 Papadakis, Maxine A. A2 McPhee, Stephen J. A2 Rabow, Michael W. A2 McQuaid, Kenneth R. SR Print(0) ID 1184179914 T1 Spider Bites & Scorpion Stings T2 Current Medical Diagnosis & Treatment 2022 YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264269389 LK accessmedicine.mhmedical.com/content.aspx?aid=1184179914 RD 2022/06/29 AB Envenomation from most species of spiders in the United States causes only local pain, redness, and swelling. The more venomous black widow spiders (Latrodectus mactans) cause generalized muscular pains, muscle spasms, and rigidity. The brown recluse spider (Loxosceles reclusa) causes progressive local necrosis as well as hemolytic reactions (rare).