An infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host
the child caught a virus
A virus in which the genetic information is stored in the form of DNA (as opposed to RNA)
= influenza virus.
A virus in which the genetic information is stored in the form of RNA (as opposed to DNA)
Any of numerous viruses (including rhinoviruses, adenoviruses, coronaviruses, and others) capable of causing colds.
Any of a group (now the genus Spumavirus) of retroviruses which infect a number of mammal species (including humans), and which induce the formation of giant cells with vacuolated cytoplasm in tissue culture, but appear to cause little or no disease in their natural hosts.
A mental or conceptual meme.
The paramyxovirus that causes mumps.
= Rous sarcoma virus.
A virus or viruslike organism that multiplies slowly in the host organism and has a long incubation period
The hantavirus that causes Korean haemorrhagic fever in humans, the natural host of which is the striped field mouse, Apodemus agrarius.
A virus carried by fruit bats which is potentially fatal to animals and humans
(Originally) any morbid matter or morbific agent that is difficult to detect; (in later use) specifically any virus that infects a plant or animal without causing apparent disease.
A virus causing mosaic disease.
The poxvirus (genus Leporipoxvirus) that is the cause of myxomatosis in the European rabbit (Oryctolagus cuniculus).
A virus that can cause epidemics of severe gastroenteritis. It has been subsumed under the genus Norovirus
A virus that is not known to cause disease.
Any of a group of DNA viruses that are usually endemic in their host species without causing disease but that can cause tumors when injected into other species
The causative agent of rabies, now recognized to be a lyssavirus (family Rhabdoviridae).
A plant virus that causes a rosette disease.
The togavirus (genus Rubivirus) that causes rubella.
A parainfluenza virus that causes disease of the upper respiratory tract in mice and is used in the laboratory to produce cell fusion
Rabies virus isolated directly from a person or animal suffering from the disease; a virulent wild-type rabies virus (especially as distinguished from a virus attenuated in culture).
The causative agent of smallpox (now known to be an orthopoxvirus).
Any of a group of enteroviruses that cause various respiratory, neurological, and muscular diseases in humans
The causative agent of influenza; (in later use) specifically any orthomyxovirus of the genera Influenzavirus A, Influenzavirus B, and Influenzavirus C.
(Originally) a virus that causes molluscum or molluscum-like lesions; (later) specifically = molluscum contagiosum virus.
The orthopoxvirus that causes monkeypox, and that is carried by squirrels, other rodents, and primates in rainforest areas of west and central Africa.
Pneumonia caused by a virus or (especially in early use) a mycoplasma.
The lentivirus that causes maedi and visna; also called visna-maedi virus, visna virus.
A herpesvirus causing infectious mononucleosis and associated with certain cancers, for example Burkitt’s lymphoma
(More fully feline panleukopenia virus) the parvovirus that causes feline panleukopenia.
A mosquito-borne alphavirus endemic in parts of Australia and certain Pacific islands, causing epidemics of a human disease characterized by fever, polyarthritis, and rash.
The retrovirus that causes Rous sarcoma; abbreviated RSV.
An RNA virus causing birth defects and stillbirths in cattle, sheep, etc., in western Europe, first identified in 2011 and thought to be transmitted by midges
A flavivirus of African origin that can be spread to humans and other mammals via mosquitoes, causing encephalitis and flulike symptoms, with some fatalities
The causative agent of yellow fever (now known to be a flavivirus).
A mosquito-borne viral disease characterized by a rash, and joint and muscle pain
A virus that causes mosaic disease in tobacco, much used in biochemical research
The morbillivirus responsible for phocine distemper.
The virus which causes chickenpox and shingles.
The human poxvirus that causes molluscum contagiosum.
Any of a subgroup (now the genus Nucleopolyhedrovirus) of baculoviruses that replicate exclusively in cell nuclei and cause nuclear polyhedrosis, especially in lepidopterans.
A paramyxovirus that causes disease of the respiratory tract. It is a major cause of bronchiolitis and pneumonia in young children and may be a contributing factor in sudden infant death syndrome
Any of a group of retroviruses that cause disease by attacking T cells
(Of software) designed to detect and destroy computer viruses
An infectious and frequently fatal disease marked by fever and severe internal bleeding, spread through contact with infected body fluids by a filovirus (Ebola virus), whose normal host species is unknown
Any of a group of enteroviruses that can cause a range of diseases, including respiratory infections and a mild form of meningitis