T = 5. Conium maculatum contains piperidine alkaloids: coniine, γ-coniceine (most toxic), N-methylconiine, conhydrine, pseudoconhydrine. γ-Coniceine oral LD₅₀ ~12 mg/kg in mice (5–50 mg/kg range → T=4 baseline). Human estimated lethal dose: 150–300 mg coniine (Nunes et al., Cureus, 2025). Clinical course: ascending neuromuscular paralysis → respiratory arrest within 2–3 h. Vital Precaution Principle applied: Karakasi et al. (Forensic Science Review 31(1):23–36, 2019 — Democritus University of Thrace & Aristotle University of Thessaloniki, Greece, EU member state) document three C. maculatum intoxication incidents, one with fatal outcome.
A = 4. Lethal to cattle and horses documented in European veterinary literature. Coniine and γ-coniceine block nicotinic acetylcholine receptors → neuromuscular blockade → respiratory failure. Binev R et al. document intoxication with C. maculatum in 38 calves including 3 fatal outcomes — direct species-specific evidence of livestock lethality. López TA et al. (Toxicon 37:841–865, 1999) provide comprehensive review of acute and chronic toxicity in cattle and horses across the European context. Poisoning typically via contaminated hay or silage. ASPCA database: toxic to dogs and cats — severe nicotinic syndrome possible. A=4 (lethal to specific species: ruminants, equids). VET flag activated automatically (A≥4). ASPCA advisory applicable.
I = 0. Native species in Luxembourg: Ferrantia 93 (2025) — LC, nativity code N, habitat RUD. Ruderal specialist restricted to disturbed habitats, roadsides, and riparian margins. No documented displacement of native plant communities in the Luxembourg/European context. Biennial life cycle precludes persistence in undisturbed natural vegetation. No allelopathic effects on natural ecosystems recorded. Absent from EU Regulation 1143/2014 Union List. I=0.
FXT. Symptom onset 30–120 min post-ingestion: nicotinic overstimulation phase (nausea, tachycardia, salivation, tremor), rapidly progressing to ascending muscular paralysis and respiratory arrest. Documented in Karakasi et al. (2019) and Nunes et al. (Cureus, 2025). Mechanism: nicotinic acetylcholine receptor blockade → fast ascending neuromuscular paralysis. FXT criterion (symptoms <2 h) satisfied with EU-level species-specific clinical documentation.
CLN — Criterion B. Karakasi MV et al. "Conium maculatum intoxication: Literature review and case report on hemlock poisoning." Forensic Science Review 31(1):23–36, 2019. Authors: Democritus University of Thrace & Aristotle University of Thessaloniki, Greece (EU member state). Three C. maculatum intoxication incidents documented, one with fatal outcome.