Toxic Mushroom Clinical Reference — Windward & Leeward Islands

Clinical Use Only. This reference is intended for healthcare providers, poison control specialists, and trained foragers. It is not a foraging identification guide. Treatment recommendations should be confirmed against current clinical guidelines and institutional protocols.

Regional Scope: This guide covers the Windward and Leeward Islands — St. Lucia, Grenada, St. Vincent & the Grenadines, Dominica, Antigua & Barbuda, and St. Kitts & Nevis. It is organized by time-to-onset, the most clinically actionable framework for mushroom poisoning triage. The most common toxic species across all islands is Chlorophyllum molybdites (False Parasol), ubiquitous on resort lawns and golf courses. Psilocybe cubensis and Copelandia cyanescens are found on cattle pasture throughout the island chain. Note: Temperate Amanita amatoxin species are absent from this ecosystem.

▲ Immediate Emergency Protocol — All Suspected Toxic Ingestions

Assess ABCs, establish IV access if patient is symptomatic
Contact local emergency services immediately — see island-specific numbers below
Secure the sample: collect remaining mushroom pieces and photos of the fungus for botanical consultation

Toxidrome 1 — Onset < 3 Hours

Early-Onset GI Distress

Primary culprit: Chlorophyllum molybdites (False Parasol)

False Parasol (Chlorophyllum molybdites)

Ecology & Habitat

Ubiquitous on resort lawns, golf courses, coastal grass, and suburban fields after heavy rain across all Windward and Leeward Islands.

Symptoms

Rapid violent onset: projectile vomiting, explosive diarrhea, severe abdominal cramping.

Treatment Protocol

Aggressive IV crystalloids (Normal Saline or Ringer’s Lactate)
IV antiemetics — Ondansetron 4–8 mg
Activated charcoal NOT routinely indicated if active vomiting has already cleared stomach
Monitor 4–6 hours
Discharge when tolerating oral fluids and electrolytes stable

Expected Outcome: High morbidity, low mortality. Most patients fully recover within 24–48 hours.

Toxidrome 2 — Onset 30 mins – 2 Hours

Neurotoxic / Hallucinogenic

Primary culprits: Psilocybe cubensis AND Copelandia cyanescens

Ecology & Habitat

Found growing on cattle dung in agricultural pastures and rural livestock areas across all Windward and Leeward Islands.

Symptoms

Visual and auditory distortions, altered time perception, emotional lability, mid-range pupillary dilation, mild tachycardia.

Treatment Protocol

Place patient in quiet, dimmed, low-stimulus room
For severe agitation, panic, or muscle tremors: Diazepam 2–5 mg IV or Lorazepam 1–2 mg IV
Treat active pediatric/canine seizures immediately with standard benzodiazepine loading
Adults rarely require admission
Monitor pediatric cases to neurological baseline

⚠ PEDIATRIC / VETERINARY WARNING: In toddlers and dogs, high doses trigger hyperpyrexia (dangerously elevated body temperature) and tonic-clonic seizures — not just hallucinations. Treat immediately.

Toxidrome 3 — Onset > 6 Hours

Delayed-Onset Systemic Toxicity CRITICAL EMERGENCY

Important Regional Note

Temperate Amanita species (amatoxins) are absent from the Lesser Antilles — they cannot survive without host hardwood forest trees which do not exist in this tropical ecosystem. However, unknown tropical cyclopeptide or cytotoxic species present a real delayed threat.

Symptom Pattern

Zero symptoms for hours → sudden severe diarrhea and vomiting → apparent improvement → acute liver or kidney failure.

Treatment Protocol

Immediate baseline labs: LFTs (AST, ALT, Total Bilirubin), Renal (BUN, Creatinine), Coagulation (PT/INR)
Aggressive high-rate IV fluids for high urine output
IV N-Acetylcysteine (NAC) if liver enzymes elevated or delayed toxic ingestion highly suspected
ICU admission
Coordinate early for potential medical evacuation if advanced hepatic support or transplantation needed

Expected Outcome: High risk of organ failure / fatality without immediate intervention.

🐾 Veterinary Protocol

Within 2 Hours of Ingestion — Animal Asymptomatic

Induce emesis or administer activated charcoal immediately.

After 2 Hours OR Symptomatic

DO NOT induce emesis (aspiration risk). Aggressive IV fluid diuresis. Hepatoprotectants: SAMe or Silibinin. Transfer immediately to nearest 24-hour veterinary facility.

⚠ CRITICAL — Dogs and Cats: Terminal hepatic necrosis can occur within 24–48 hours (vs 3–5 days in humans). Immediate emergency admission, high-rate IV fluids, baseline blood panels, aggressive hepatoprotectants.

Island-Specific Emergency Contacts — Windward & Leeward Islands