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Peru’s EsSalud Issues National Alert on Rising ‘Araña Casera’ Bites

Officials warn that Loxosceles laeta venom can trigger renal damage with fatal outcomes.

Overview

  • EsSalud reports 2,084 bite cases nationwide from 2020–2025, including 1,632 patients admitted through emergency services.
  • Arequipa, La Libertad, Lima and Ica show the highest incidence, with adults 30–59 most affected and more than 290 cases in children ages 0–11.
  • Alarm symptoms requiring immediate evaluation include violaceous swelling at the bite site, fever with chills, intense abdominal pain, and dark cola-colored urine.
  • First-aid guidance advises keeping calm, applying ice around the wound, washing with soap and water, elevating the limb, avoiding creams or menthols, and seeking urgent medical care.
  • The reclusive brown spider with a violin-shaped dorsal mark hides in dark household spaces and becomes more active in summer, so officials urge frequent cleaning, shaking out clothing and shoes, and keeping beds away from walls.