Crossword Genius

First microbiologist (7)

Ross

I believe the answer is:

pasteur

(Other definitions for pasteur that I've seen before include "Louis --, French bacteriologist" , "French chemist, 1822-95" , "Louis -, nineteenth century French chemist" , "French chemist and biologist (1822-1895)" , "He developed the partial sterilization of milk" .)

I've seen this clue in the Sydney Morning Herald.
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