Ebola virus

Ebola virus (ēbō´lə), a member of a family (Filovidae) of RNA viruses that cause hemorrhagic fevers. The virus, named for the region in Congo (Kinshasa) where it was first identified in 1976, emerged from the rain forest, where it survives in as yet unconfirmed hosts, possibly several species of fruit bats but potentially other mammal species; experimental evidence suggests that wild and domestic swine may be a reservoir of the disease. The virus can be fatal to chimpanzees and gorillas as well as humans. In 1989 a similar virus was found in monkeys imported to the United States.

Several strains of the virus found in Africa cause hemorrhagic fever; one found in the W Pacific does not. Once a person is infected with the virus, the disease has an incubation period of 2–21 days; however, some infected persons are asymptomatic. Initial symptoms are sudden malaise, headache, and muscle pain, progressing to high fever, vomiting, severe hemorrhaging (internally and out of the eyes and mouth) and in 50%–90% of patients, death, usually within days. The likelihood of death is governed by the virulence of the particular Ebola strain involved. Ebola virus is transmitted in body fluids and secretions; it may possibly also be transmitted through the air by aerosol droplets. There is no cure. A vaccine, rVSV-ZEBOV, has been developed against the strain that caused the 2013–15 West African outbreak. It was effective, but it was experimental and saw limited use during the outbreak. It is unclear if the protection provided by the vaccine will be long lasting.

Outbreaks of Ebola virus in humans have typically occurred in tropical rainforest regions in Central and West Africa. Among the countries affected have been Congo-Kinshasa (then Zaïre) and Sudan (in a region now in South Sudan), where outbreaks occurred in 1976 and 1979; since then other outbreaks have occurred in Gabon, Uganda, and both Congos. The largest and deadliest outbreak began in late 2013 in Guinea and spread to neighboring Liberia and Sierra Leone, with a few cases in some nearby African nations and in the United States and Europe; some 11,300 people—many more than in any prior outbreak—died in the following two years. Outbreaks have been exacerbated by underequipped and understaffed medical facilities, families caring for patients at home, suspicions that medical personnel are spreading the disease, and other factors.

See D. Quammen, Ebola (2014).

The Columbia Encyclopedia, 6th ed. Copyright© 2018, The Columbia University Press.

Ebola: Selected full-text books and articles

Questions and Answers concerning Ebola Daily Herald (Arlington Heights, IL), October 1, 2014
Viruses, Plagues, and History By Michael B. A. Oldstone Oxford University Press, 2000
Librarian's tip: Chap. 10 "Ebola"
Ebola: Why the Death and Suffering? By Abraham, Curtis New African, No. 542, August-September 2014
Time to Put Ebola in Context: Viruses That Cause Haemorrhagic Fevers Have Been Popularized by the Media as Fierce Predators That Threaten to Devastate Global Populations. Professor Melissa Leach Says There Is Much to Learn from Combining Local and Scientific Knowledge in Dealing with These Deadly Pathogens Bulletin of the World Health Organization, Vol. 88, No. 7, July 2010
Peer-reviewed publications on Questia are publications containing articles which were subject to evaluation for accuracy and substance by professional peers of the article's author(s).
Some Good News about Ebola: It Won't Spread as Fast as Other Epidemics By Chowell-Puente, Gerardo Daily Herald (Arlington Heights, IL), October 2, 2014
Agents of Bioterrorism: Pathogens and Their Weaponization By Geoffrey Zubay Columbia University Press, 2005
Librarian's tip: Chap. 5 "Ebola Viruses"
Is the "Poor Man's Atomic Bomb" about to Explode? USA TODAY, Vol. 143, No. 2832, September 2014
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