Washington, venomous spider bites usually are reported from areas Spiders, most such bites are caused by hobo spiders (formerly also Northwest often are erroneously attributed to brown recluse Editorial NoteĮditorial Note: Although envenomating spider bites in the Pacific
Kaufman, MD, West Linn Pediatric Clinic, West Linn, Oregon. Keene, PhD, M Heumann, MPH, Center for Disease Prevention andĮpidemiology, Oregon Health Div, Oregon Dept of Human Resources S Reported by: DK Vest, Idaho Falls, Idaho. Prevention and Epidemiology, Oregon Health Div, Oregon Dept of (there is no coding category for hobo spiders).Īdapted from: CD Summary 1995 14(no. Including 66 (27%) that were classified as brown recluse bites population.Ī specific kind of spider was noted for 246 of these bites, Washington, which comprise approximately 4% of the U.S. Was reported to poison-control centers in Idaho, Oregon, and Of these, a disproportionate number (1027 Poison-control center log reports compiled by the AmericanĪssociation of Poison Control Centers listed 9418 spider bites Standard coding scheme for classifying calls. Some physicians who treat spider bites contact poison-controlĬenters for advice or information most of these centers use a Some persons who suspect they have been bitten by spiders and Spider Bites Reported to Poison-Control Centers During 1994 The patient's home during an inspection of the patient's agrestis spiders were abundant along railroad tracks adjacent to Despite transfusion therapy, the patientĭeveloped severe internal hemorrhage and died in early March 1988. An eschar on her leg was consistent with necrosisįrom a spider bite. With a diagnosis of aplastic anemia, pancytopenia, and Medical attention until February 16, 1988, when she began to bleedįrom her ears and other orifices. Although symptoms persisted, she did not seek Within 24 hours, she developed a severe headache, nausea, andĪltered mentation. Spokane, Washington, was bitten by a "bug" on her right thigh. In late January 1988, a 56-year-old resident of Patient remains unable to work in situations requiring standing orĬase 3. The lesion healed slowlyīetween May and November 1994, but left a cratered scar. Which did not respond to standard therapy. A venogram in July 1993 indicated deep venous thrombosis, The ulcerationĬontinued to enlarge, and swelling of the leg and toes impaired The patient sought medical care on December 26,ġ992, and received a course of antibiotics. During the next 10 weeks the ulcer deepened andĮxpanded to a diameter of approximately 30 mm, circumscribed by aīlackish margin. Had ruptured, leaving an open ulcer with a diameter ofĪpproximately 2 mm. An erythematous lesion with a vesicularĬenter was noted several hours later by the next day the vesicle The pain on herĪnkle persisted, and within 3 hours she was dizzy and nauseated and She rolled up the leg of her pants and found a crushed brown On October 8, 1992, a 42-year-old woman residing inīingham County, Idaho, who had a history of phlebitis felt aīurning sensation on her left ankle while at work at a convenience House reported that it was infested with T. After 30 days, ecchymotic residua were still visible,īut local tenderness was diminished. Treatment included oralĭiphenhydramine hydrochloride and alternating local applications of
Hobo spider size skin#
Necrosis and skin sloughing developed, and his entire leg and ankle Within 48 hours, two swollen and erythematous lesions 3-4Ĭm in diameter developed around the site of the bite. Suburban Portland, Oregon, was bitten on the lower leg while asleep On November 23, 1995, a 10-year-old boy residing in The need for physicians in the northwestern United States toĬonsider this species as a cause of toxic arachnidism.Ĭase 1. poison-control centers during 1994 and emphasizes
agrestisīites among persons in Idaho, Oregon, and Washington spider bites Report summarizes investigations of three cases of T. Of arachnid envenomation from the hobo spider (Tegenaria agrestis)Īre being reported increasingly in the Pacific Northwest. Spp., particularly the brown recluse, Lox. The best known exceptions are widow spiders (Latrodectus spp., States, most domestic spiders are not substantially venomous to Necrotic Arachnidism - Pacific Northwest, 1988-1996Īlthough spider bites are common in many parts of the United For assistance, please send e-mail to: Type 508 Accommodation and the title of the report in the subject line of e-mail. Persons using assistive technology might not be able to fully access information in this file.
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