John Joseph Mackenzie (24 March 1865 – 1 August 1922) was a

Canadian Canadians (french: Canadiens) are people identified with the country of Canada. This connection may be residential, legal, historical or cultural. For most Canadians, many (or all) of these connections exist and are collectively the source of ...

pathologist Pathology is the study of the causal, causes and effects of disease or injury. The word ''pathology'' also refers to the study of disease in general, incorporating a wide range of biology research fields and medical practices. However, when us ...

and

bacteriologist A bacteriologist is a microbiologist, or similarly trained professional, in bacteriology -- a subdivision of microbiology that studies bacteria, typically Pathogenic bacteria, pathogenic ones. Bacteriologists are interested in studying and learnin ...

. He was born at St. Thomas, Canada West, and was educated at

Toronto Toronto ( ; or ) is the capital city of the Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the most populous city in Canada and the fourth most populous city in North America. The city is the ancho ...

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, and

Berlin Berlin ( , ) is the capital and largest city of Germany by both area and population. Its 3.7 million inhabitants make it the European Union's most populous city, according to population within city limits. One of Germany's sixteen constitue ...

universities, and later was appointed bacteriologist at the Ontario Board of Health. In 1900 he became

professor Professor (commonly abbreviated as Prof.) is an Academy, academic rank at university, universities and other post-secondary education and research institutions in most countries. Literally, ''professor'' derives from Latin as a "person who pr ...

of pathology and bacteriology in Toronto University. He was made fellow of the

Royal Society of Canada The Royal Society of Canada (RSC; french: Société royale du Canada, SRC), also known as the Academies of Arts, Humanities and Sciences of Canada (French: ''Académies des arts, des lettres et des sciences du Canada''), is the senior national, bil ...

(1909), president of the

Canadian Institute The Royal Canadian Institute for Science (RCIScience), known also as the Royal Canadian Institute, is a Canadian nonprofit organization dedicated to connecting the public with Canadian science. History The organization was formed in Toronto as t ...

(1909), and a member of the Society of American Bacteriologists and of the

American Association of Pathologists and Bacteriologists The American Association of Pathologists and Bacteriologists (AAPB) was an American national professional association established in 1901, devoted to fundamental science and academic medicine as distinct from clinical medicine. In 1976, they joined ...

. He contributed scientific papers to the medical press and published ''Recent Theories in Regard to the Causes of Immunity to Infectious Disease'' (1907).

External links

Biography at the ''Dictionary of Canadian Biography Online''John Joseph Mackenzie archival papers
held at th
University of Toronto Archives and Records Management Services
* 1865 births 1922 deaths Canadian science writers Fellows of the Royal Society of Canada Canadian pathologists People from St. Thomas, Ontario University of Toronto alumni {{Canada-scientist-stub