How many letters does the top answer for “anaerobic bacterium producing botulin the toxin that causes botulism” have?

The most common answer is botulinum (9 letters).

Crossword clue: anaerobic bacterium producing botulin the toxin that causes botulism

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

botulinum 9 letters wn-def

anaerobic bacterium producing botulin the toxin that causes botulism

botulinus 9 letters wn-def

anaerobic bacterium producing botulin the toxin that causes botulism