skip to main content

Black widow envenomation — ABEM Board MCQ

Instant feedback + full explanation. One question, done properly.

ModerateEnvironmental emergenciesBlack widow envenomationABEM Board

A 27-year-old woman arrives with severe abdominal cramping and back pain after reaching into a woodpile. Triage acuity is ESI 3; BP 166/96 mm Hg, HR 118/min. She has localized punctum on the forearm, diaphoresis, and muscle rigidity. Abdomen has no peritoneal signs. Which of the following is the most likely diagnosis?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: E — Black widow spider envenomation

Latrodectus envenomation causes severe muscle cramping, abdominal rigidity without peritonitis, hypertension, and diaphoresis.

Reference: Wilderness Medical Society arthropod envenomation guidance