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Spiders are carnivorous arthropods that coexist with humans and ambush or ensnare prey. Unlike other arthropods, spiders rarely transmit communicable diseases, and play a critical role in the ecosystem by consuming other arthropods that frequently transmit human diseases, such as mosquitoes and flies. There are more than 30,000 species of spiders, most of which are venomous, but they cannot inflict serious bites due to delicate mouthparts and short fangs. The differential diagnosis of spider bites is extensive and includes other arthropod bites, skin infections, and exposure to chemical or physical agents. However, approximately 200 species from 20 genera of spiders worldwide can cause severe human envenomings, with dermonecrosis, systemic toxicity, and death. Spider bites can usually be prevented by simple personal and domestic measures. Early species identification and specific management may help prevent serious sequelae of spider bites.
Received February 4, 2004. Accepted for publication March 11, 2004.
Financial support: This work was supported by departmental and institutional sources and by a state grant from the Health Education Fund of the Board of Regents, State of Louisiana, entitled "The Assessment and Remediation of Public Health Impacts due to Hurricanes and Major Flooding Events."
Author’s address: James H. Diaz, School of Public Health, Louisiana State University Health Sciences Center in New Orleans, 1600 Canal Street, Suite 800, New Orleans, LA 70112, Telephone: 504-599-1067, Fax: 504-568-6905, E-mail: jdiaz{at}lsuhsc.edu.
Reprint requests: James H. Diaz, Division of Environmental and Occupational Health Sciences, School of Public Health, Louisiana State University Health Sciences Center-New Orleans, 1600 Canal Street, Suite 800, New Orleans, LA 70112.
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