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Black house spiders are unlikely culprits in necrotic arachnidism: a prospective study

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Twenty-five patients with definite bites by Badumna spp. spiders were recruited prospectively. Bites occurred across Australia, 92% from October to March, and most during daylight. Pain occurred in all cases, was severe in seven cases, with a median duration of 5 min. Other effects included: puncture marks (24%), swelling (12%) and erythema (68%). Minor systemic effects occurred in 4 bites. No patient had a necrotic ulcer (0%; 97.5% confidence interval 0−14%). Black house spiders (Badumna spp.) are unlikely to cause necrosis, contrary to reports of suspected bites. Patients can be reassured and do not require any further investigation or treatment. (Intern Med J 2004; 34: 287−289)
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Keywords: Badumna; arachnidism; black house spider; spider bite; window spider

Document Type: Research Article

Affiliations: 1: Clinical Envenoming Research Group, University of Newcastle and Newcastle Mater Misericordiae Hospital, Newcastle and 2: Division of Invertebrate Zoology, Australian Museum, Sydney, New South Wales, Australia

Publication date: 01 May 2004

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