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French bacteriologist born in Switzerland; was a student of Pasteur; discovered the plague bacillus (1863-1943)

French bacteriologist born in Switzerland; was a student of Pasteur; discovered the plague bacillus (1863-1943)

French bacteriologist born in Switzerland; was a student of Pasteur; discovered the plague bacillus (1863-1943)

shaped and dried dough made from flour and water and sometimes egg

shaped and dried dough made from flour and water and sometimes egg