Envenomation by the sac spider Chiracanthium mildei

Area of Science:

• * Arachnology
• * Toxicology
• * Dermatology

Background:

• * Sac spiders (genus Chiracanthium) are known for their venomous bites.
• * Previous reports document various clinical responses to Chiracanthium spider bites globally.
• * Geographic distribution of Chiracanthium mildei includes Europe, Australia, and parts of the United States.

Observation:

• * A 19-year-old male experienced a sudden, painful bite from a female Chiracanthium mildei.
• * Immediate onset of an erythematous urticarial plaque at the bite site.
• * Development of punctate macules and induration at the bite area over time.

Findings:

• * The clinical presentation of the bite was consistent with previously documented Chiracanthium spider envenomation.
• * Notably, necrotic lesions, often associated with these bites, were absent in this case.
• * This represents the first documented case of a Chiracanthium mildei bite in Connecticut.

Implications:

• * Expands the known geographic range of clinically significant Chiracanthium mildei bites.
• * Provides further data on the spectrum of clinical reactions to sac spider venom.
• * Informs medical professionals in Connecticut about potential spider bite presentations.