Ernest Edward Tyzzer (August 30, 1875 – January 23, 1965) was an American physician,

pathologist Pathology is the study of disease. 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 used in the context of modern medical treatme ...

and

parasitologist Parasitology is the study of parasites, their hosts, and the relationship between them. As a biological discipline, the scope of parasitology is not determined by the organism or environment in question but by their way of life. This means it f ...

. He was involved in cancer research but is particularly noted for his work in

parasitology Parasitology is the study of parasites, their host (biology), hosts, and the relationship between them. As a List of biology disciplines, biological discipline, the scope of parasitology is not determined by the organism or environment in questio ...

, describing numerous new species of avian parasites in a career spanning 40 years. Tyzzer attended

Brown University Brown University is a Private university, private Ivy League research university in Providence, Rhode Island, United States. It is the List of colonial colleges, seventh-oldest institution of higher education in the US, founded in 1764 as the ' ...

from 1893–7, funding his studies on the proceeds of

trapping Animal trapping, or simply trapping or ginning, is the use of a device to remotely catch and often kill an animal. Animals may be trapped for a variety of purposes, including for meat, fur trade, fur/feathers, sport hunting, pest control, and w ...

animals such as fox and mink. Before attending medical school, he obtained master's degree on

flounder Flounders are a group of flatfish species. They are demersal fish, found at the bottom of oceans around the world; some species will also enter estuary, estuaries. Taxonomy The name "flounder" is used for several only distantly related speci ...

(a type of

flatfish A flatfish is a member of the Ray-finned fish, ray-finned demersal fish Order (biology), suborder Pleuronectoidei, also called the Heterosomata. In many species, both eyes lie on one side of the head, one or the other migrating through or around ...

), partly undertaken at

Woods Hole Oceanographic Institution The Woods Hole Oceanographic Institution (WHOI, acronym pronounced ) is a private, nonprofit research and higher education facility dedicated to the study of marine science and engineering. Established in 1930 in Woods Hole, Massachusetts, it i ...

. He began at

Harvard Medical School Harvard Medical School (HMS) is the medical school of Harvard University and is located in the Longwood Medical and Academic Area, Longwood Medical Area in Boston, Massachusetts. Founded in 1782, HMS is the third oldest medical school in the Un ...

in 1898. In 1905, while an assistant in Pathology at Harvard, he studied the histology of the skin lesions in varicella, being the first to recognize

inclusion bodies Inclusion bodies are aggregates of specific types of protein found in neurons, and a number of tissue (biology), tissue cells including red blood cells, bacteria, viruses, and plants. Inclusion bodies of aggregations of multiple proteins are also ...

in varicella. In 1907, Tyzzer was a founder member of the

American Association for Cancer Research The American Association for Cancer Research (AACR) is the world's oldest and largest professional association related to cancer research. Based in Philadelphia, the AACR focuses on all aspects of cancer research, including Basic research, basic, ...

, serving as its president from 1912–1913. In 1913, when he was an assistant professor and director of cancer research at

Harvard University Harvard University is a Private university, private Ivy League research university in Cambridge, Massachusetts, United States. Founded in 1636 and named for its first benefactor, the History of the Puritans in North America, Puritan clergyma ...

, he and two other scientists (Richard P. Strong and

C. T. Brues Charles Thomas Brues (June 20, 1879, Wheeling, West Virginia – July 22, 1955, Crescent City, Florida, Crescent City, Florida) was an American entomologist. Biography Brues studied at the University of Texas at Austin and at Columbia Univers ...

) studied tropical diseases in

Peru Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac ...

and

Ecuador Ecuador, officially the Republic of Ecuador, is a country in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean on the west. It also includes the Galápagos Province which contain ...

. Tyzzer was elected to the

American Academy of Arts and Sciences The American Academy of Arts and Sciences (The Academy) is one of the oldest learned societies in the United States. It was founded in 1780 during the American Revolution by John Adams, John Hancock, James Bowdoin, Andrew Oliver, and other ...

in 1914. Tyzzer was appointed head of the Department of Comparative Pathology at Harvard in 1916, remaining in that post until his retirement in 1942. Tyzzer was elected to the

American Philosophical Society The American Philosophical Society (APS) is an American scholarly organization and learned society founded in 1743 in Philadelphia that promotes knowledge in the humanities and natural sciences through research, professional meetings, publicat ...

in 1931 and the United States

National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, NGO, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the ...

in 1942.

Personal life

Tyzzer was born in

Wakefield, Massachusetts Wakefield is a New England town, town in Middlesex County, Massachusetts, United States, in the Greater Boston, greater Boston metropolitan area, municipal corporation, incorporated in 1812 in the United States, 1812 and located about north-nor ...

, the youngest of five children. He was married and had two sons.

References

1875 births 1965 deaths American parasitologists Harvard Medical School alumni Brown University alumni Presidents of the American Society of Parasitologists {{US-physician-stub Members of the American Philosophical Society