Spider bites: Difference between revisions

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===Clinically important spider genera by geographic region===  
===Clinically important spider genera by geographic region===  
* North America   
* North America   
** Loxosceles  
** Loxosceles (e.g. [[brown recluse]])
** Latrodectus  
** Latrodectus  
** Tegenaria  
** Tegenaria  
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===Types===
===Types===
*[[Brown recluse spider bite]]
*[[Black widow spider bite]]
*[[Black widow spider bite]]
*[[Funnel-web spider bite]]
*[[Funnel-web spider bite]]

Revision as of 13:17, 29 May 2022

Background

Clinically important spider genera by geographic region

  • North America
  • South America
  • Africa
    • Loxosceles
    • Latrodectus
  • Europe
    • Loxosceles
    • Latrodectus
  • Australia
    • Atrax
    • Hadronyche
    • Latrodectus
  • Asia
    • Latrodectus

Types

Clinical Features

History

  • Determine circumstances of bite to assess consistency with spider habitat and behavior
    • Indoors vs outdoors
    • Day vs night
    • Geographic location (recent travel)
  • Appearance of the spider if seen
  • Dead spiders can be preserved in 70% EtOH and later identified by arachnologists or entomologist

Physical Exam

  • No pathognomonic signs proving lesion is a spider bite
  • Assess both bite site and for systemic signs
  • Bite Site
    • Location
      • Spider bites more common when clothing is tight against skin
    • Number of bites
      • Multiple bites suggest parasitic insect and not spider
    • Appearance of bite
      • Erythema, pallor, hemorrhage, induration, tenderness, paresthesia, vesicles
  • Systemic findings

Differential Diagnosis

Envenomations, bites and stings

Evaluation

Workup

Diagnosis

Management

Disposition

See Also

External Links

References

  • Boyer LV, Binford GJ, Degan JA. Spider Bites. In Auerbach PS, Cushing TA, Harris NS. Auerbach’s Wilderness Medicine. 7th ed. Philadelphia, PA: Elsevier; 2017: 993-1016.