These example sentences are selected automatically from various online news sources to reflect current usage of the word 'virus.' A pathogen composed of nucleic acid within a protein shell, which can grow and reproduce only after infecting a host cell. Computer viruses never occur naturally. When it emerged, the virus was known as a “novel” strain of the coronavirus family. If anyone can help-Thank You! It is composed of eight segments, including a nucleoprotein (which folds its nucleic acids and helps them to be transcribed), a hemagglutinin (which helps it to enter cells), a neuraminidase (which helps it to bud out of infected cells), several transcriptases (which make copies of the viral RNA), a matrix protein (which supports the outer membrane), and several nonstructural proteins. and what are the treatment options ? More than 400 types of viruses that cause a great variety of illness are known. Health care professionals should advise patients and families to limit time out of doors, esp. An infection may remain localized, or it may spread through the blood or lymphatic vessels to become systemic (bodywide). It can also be spread by contact with infected blood or from mother to child during pregnancy, childbirth or breast-feeding. A virus is a microscopic package of genetic material surrounded by a molecular envelope. Standard precautions prevent spread of the virus. What made you want to look up virus? A virus that permits a defective virus present in the same cell to replicate. A virus associated with hairy cell leukemia. “Virus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/virus. Since West Nile virus was identified in the U.S. in 1999, it has produced a nationwide epidemic of encephalitis. The lipid envelope is frequently dotted by spikes. Synonym: Either of two human DNA viruses (HSV-1 and -2) that cause repeated painful vesicular eruptions on the genitals and other mucosal surfaces and on the skin. After initial contact with the skin or mucous membranes, the virus migrates along nerve fibers to sensory ganglia, where it establishes a latent infection. An arenavirus from the Tacaribe virus group that chronically infects rodents. He took a hot bath and went to bed. 'Nip it in the butt' or 'Nip it in the bud'. A virus such as the papilloma virus and the herpesviruses whose genome is deoxyribonucleic acid (DNA). It causes a two-stage illness: fever followed by a brief remission, and then meningoencephalitis, hemorrhagic pneumonia, and hepatic and splenic disruption. A virus with reduced pathogenicity as a result of treatment or repeated passage through hosts. A virus that causes malignant neoplasms. The virus requires someone to knowingly or unknowingly spread the infection without the knowledge or permission of a … When viruses enter a cell, they may immediately trigger a disease process or remain quiescent for years. He's making a quiz, and checking it twice... Test your knowledge of the words of the year. Monday night the pain in his back started and he thought he must have twisted wrong somehow. An Arenavirus that chronically infects rodents. It is related to other orthopoxviruses (which cause smallpox, monkeypox, and vaccinia). Room assignments should be arranged to avoid cross-contamination whenever possible. any member of a unique class of infectious agents, which were originally distinguished by their smallness (hence, they were described as “filtrable” because of their ability to pass through fine ceramic filters that blocked all cells, including bacteria) and their inability to replicate outside of and without assistance of … and please help! The name is from a Latin word meaning “slimy liquid” or “poison.” b. It is transmitted to humans from infected swine, e.g., in slaughterhouses. Individuals with symptoms of respiratory infection should be prevented from caring for or visiting pediatric, immunocompromised, or cardiac patients. Use this page to make sure your security content is current. A Flavivirus that primarily infects birds but can be transmitted by mosquito bite to humans and other animals. The next morning, He couldn't move. A tiny particle that can cause infections by duplicating itself inside a cell using the cell's own software. The administration of high doses of respiratory syncytial virus immune globulin is an effective means of preventing lower respiratory tract infection in infants and young children at high risk for contracting this disease. The most common type of HIV is HIV-1, identified in 1984. A virus such as the HIV, influenza virus, and polio virus whose genome is ribonucleic acid (RNA). Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Protective coverings should be removed in this order: gloves (followed by hand hygiene), goggles or face shield, gown, and finally mask or respirator, discarding them in an infectious waste container in the patient’s room. It is remotely related to hepatitis C virus. The patient with genital herpes should wash the hands carefully after bathroom use. It is a roughly spherical virus. An Alphavirus found in central Africa that causes epidemic fevers, joint pains, and swollen glands. Another word for virus. Human immunodeficiency virus: retrovirus particle. Beijerinck, in studying tobacco mosaic virus, mistakenly believed that the agent was a fluid (contagium vivum fluidum, "living fluid infection") because it passed through filters capable of trapping bacteria. An Alphavirus transmitted by mosquito bite that causes fevers, rash, and epidemic arthritis in multiple joints. All of them can attach to cell membranes, enter the cytoplasm, take over cellular functions, reproduce their parts, and assemble themselves into mature forms capable of infecting other cells. Virus, infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria. One of a group of viruses that affects infants and young children. A single-stranded RNA virus transmitted to humans by tick bite. ‘a virus infection’ ‘When found outside of host cells, viruses exist as a protein coat or capsid, sometimes enclosed within a membrane.’ ‘Such viruses enter the host cell … This is accomplished by releasing the viral genetic material into the host cytoplasm if it is RNA, and into the host nucleus if it is DNA, and thus inducing the production of new viral particles and newly infected cells. Virus Definitions & Security Updates. When limited to the upper respiratory tract, RSV causes symptoms of the common cold. Learn a new word every day. They damage the host cell by blocking its normal protein synthesis and using its metabolic machinery for their own reproduction. Viruses replicate only within cells of living hosts. A California serogroup virus of the Bunyaviridae family. Informal. ... Full list. Middle English, "pus, discharge from a sore, semen," borrowed from Latin vīrus (neuter) "venom, poisonous fluid, acrid element in a substance, secretion with medical or magical properties," going back to an Indo-European base *u̯is-/*u̯īs- "poison, venom," whence also Middle Irish fí "venom, poison, evil," Greek īós "poison," Tocharian A wäs and Tocharian B wase, Sanskrit viṣáṃ, Avestan viš, viša- (also vīš? 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