Rocky Mountain spotted fever

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Rocky Mountain spotted fever

Rocky Mountain wood tick

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Internet http://www blue screen. Hompepage blog 2009, history and society, media news television, crowd opinion protest, In the News 2009, breaking news

Who Invented the Internet?

Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar

Ten Days That Vanished: The Switch to the Gregorian Calendar

Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere

Why Do Some Cicadas Appear Only Every 17 Years?

Berries and leaves of the bittersweet nightshade (Solanum dulcamara) plant. Poisonous plant

7 of the World’s Deadliest Plants

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

Aspirin pills.

7 Drugs that Changed the World

Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

Rocky Mountain spotted fever: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Facts

Also Known As	São Paulo fever

Photos

Rocky Mountain spotted fever

Rocky Mountain wood tick

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Topics

typhus Amblyomma cajennense American dog tick lone star tick Rickettsia rickettsii Rocky Mountain wood tick fever tick boutonneuse fever zoonotic disease malaria tuberculosis plague Ebola bird flu anthrax rabies mpox Lyme disease schistosomiasis

Key People

Howard T. Ricketts

American pathologist

Quiz

44 Questions from Britannica’s Most Popular Health and Medicine Quizzes