Alternative or older form referring to the botulinum bacterium or its toxin.
From Latin botulus (sausage) plus the Latinized adjectival ending '-inus', representing an earlier scientific nomenclature for the organism now called Clostridium botulinum.
Scientific naming conventions have evolved, so older literature uses 'botulinus' where modern texts say 'botulinum'—it's a reminder that even our most precise scientific terms shift over time as knowledge improves.
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