May one trap snakes and scorpions on Shabbat for protection vs. for medicine?

ShabbatTrapping (Tzad)

Synopsis

The Mechaber rules that trapping dangerous creatures for medicinal purposes incurs liability, but trapping them for protection (so as not to be bitten) is permitted. The basis is that self-protection is a melakha she'eina tzerikha l'gufa (labor not needed for its own sake).

Rishonim
Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

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