Lassa fever(redirected from Lassavirus)
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a highly fatal acute type of hemorrhagic fever caused by a virulent arenavirus, occurring in West Africa, and characterized by progressive prostration, sore throat, ulcerations of the mouth or throat, rash, and general aches and pains, which may be followed by serous effusions, generalized hemorrhages, and fatal shock.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
a severe form of epidemic hemorrhagic fever, which is usually fatal. It was first recognized in Lassa (Nigeria); caused by the Lassa virus, a member of the Arenaviridae family; is characterized by high fever, sore throat, severe muscle aches, skin rash with hemorrhages, headache, abdominal pain, vomiting, and diarrhea. The multimammate rat Mastomys natalensis serves as reservoir, but person-to-person transmission is also common.
Synonym(s): Lassa hemorrhagic fever
Farlex Partner Medical Dictionary © Farlex 2012
Lassa fever(lä′sə, lăs′ə)
An acute form of hemorrhagic fever endemic to West Africa that is caused by an arenavirus transmitted by a species of rat and is characterized by fever, headache, gastrointestinal symptoms, and bleeding from the gums, and can result in deafness.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
Las·sa fe·ver(lah'să fē'vĕr)
A severe form of epidemic hemorrhagic fever that is highly fatal. It was first recognized in Lassa, Nigeria; is caused by the Lassa virus, a member of the Arenaviridae family, and characterized by high fever, sore throat, severe muscle aches, rash with hemorrhages, headache, abdominal pain, vomiting, and diarrhea. The multimammate rat Mastomys natalensis serves as a reservoir, but person-to-person transmission is also common.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
Lassa feverAn infectious disease caused by an arenavirus and first noted in 1969 in West Africa. The disease is maintained in the rat population and spread by rat urine. Lassa fever features a high temperature for 7 to 17 days, slow pulse, sore throat, red eyes, prostration, vomiting and pain in the chest wall and abdomen. Yellow spots and ulcers appear on the tonsils. There is a drop in the white cell count in the blood (leukopenia), internal bleeding and often liver and kidney failure. The most severely affected pass into coma and die of inadequate circulation (shock), respiratory insufficiency, or cardiac arrest. The mortality rate may be as high as 50% but many mild cases occur. Strict isolation is necessary. Treatment is with the antiviral drug RIBAVIRIN and with plasma from convalescent patients.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005