1) Biologist 2) Life scientist 1) Bruce 2) Ehrlich 3) Koch 4) Metchnikoff 5) Metchnikov 6) Reiter 7) Wassermann 8) Yersin 9) Zinsser 
[Professional] A bacteriologist is a professional trained in bacteriology a subdivision of microbiology. The duties of a bacteriologist include prevention, diagnosis and prognosis of diseases, as well as health care, and they may carry out various functions such as epidemiological surveillance, quality auditing, biotechnology development, b...
• (n.) One skilled in bacteriology.
(bak-tēr″e-ol´ә-jist) an expert in bacteriology.
Bac·te'ri·ol`o·gist noun One skilled in bacteriology. 
Type: Term Pronunciation: bak-tēr′ē-ol′ŏ-jist Definitions: 1. One who primarily studies or works with bacteria.
[n] - a biologist who studies bacteria
noun a biologist who studies bacteria