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yellow fever

(Encyclopedia)yellow fever, acute infectious disease endemic in tropical Africa and many areas of South and Central America. Yellow fever is caused by a virus transmitted by the bite of the female Aedes aegypti mos...

hemorrhagic fever

(Encyclopedia)hemorrhagic fever hĕmˌərăjˈĭk [key], any of a group of viral diseases characterized by sudden onset, muscle and joint pain, fever, bleeding, and shock from loss of blood. Bleeding occurs in the ...

fever

(Encyclopedia)fever, elevation of body temperature above the normal level, which in humans is about 98℉ (37℃) when measured orally. Fever is considered to be a symptom of a disorder rather than a disease in its...

Q fever

(Encyclopedia)Q fever, disease caused by Coxiella burnetii, a small, Gram-negative bacterium. The bacterium infects livestock (cattle, goats, and sheep) and other domesticated animals, and is found in the urine, fe...

Yellow Book

(Encyclopedia)Yellow Book, English illustrated quarterly published (1894–97) in book form in London. Henry Harland was literary editor, and Aubrey Beardsley, whose exotic and provocative drawings brought immediat...

yellow daisy

(Encyclopedia)yellow daisy: see black-eyed Susan. ...

Yellow Emperor

(Encyclopedia)Yellow Emperor, Mandarin Huangdi, legendary Chinese ruler and culture hero; tradition holds that he reigned from 2697 b.c. to 2597 b.c. He is one of the mythical prehistoric emperors who supposedly cr...

yellow jacket

(Encyclopedia)yellow jacket: see wasp.

yellow journalism

(Encyclopedia)yellow journalism: see newspaper. ...

yellow poplar

(Encyclopedia)yellow poplar: see magnolia.