| thogoto-like viruses | A genus of the family orthomyxoviridae comprising tick-borne viruses occasionally infecting humans. Dhori and thogoto viruses were formerly thought to be members of bunyaviridae. Thogoto virus is the type species. (12 Dec 1998) |
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| emerging viruses | In epidemiology, a class of viruses that have long infected humans or animals but now have the opportunity to attain epidemic proportions due to human encroachment on tropical rainforests, increased international travel, burgeoning populations in less developed countries, and, possibly, global warming. About two dozen viruses have been termed emergent, including haemorrhagic viruses such as Ebola, Marburg, and Hantaan; the rabies-like viruses Mokola and Duvenhage; rodent-borne Jinin and Lassa virus; and mosquito-borne dengue. Virologists speculate that the strain of HIV that causes AIDS may also fall into this category, having entered humans through contact with monkeys in central Africa, possibly having existed among monkey populations for some 50,000 years. (05 Mar 2000) |
| encephalitis viruses | A collection of single-stranded RNA viruses scattered across the bunyaviridae, flaviviridae, and togaviridae families whose common property is the ability to induce encephalitic conditions in infected hosts. (12 Dec 1998) |
| encephalitis viruses, japanese | A subgroup of the genus flavivirus which comprises a number of viral species that are the aetiologic agents of human encephalitis in many different geographical regions. These include japanese encephalitis virus (encephalitis virus, japanese), st. Louis encephalitis virus (encephalitis virus, st. Louis), kunjin virus, murray valley encephalitis virus (encephalitis virus, murray valley), and west nile virus. (12 Dec 1998) |
| encephalitis viruses, tick-borne | A subgroup of the genus flavivirus that causes encephalitis and haemorrhagic fevers and is found in eastern and western europe and the former soviet union. It is transmitted by tick vectors and there is an associated milk-borne transmission from viraemic cattle, goats, and sheep. (12 Dec 1998) |
| enteric orphan viruses | Enteroviruses isolated from humans and other animals, "orphan" implying lack of known association with disease when isolated; many virus's of the group are now known to be pathogenic; they include ECBO viruses, ECHO viruses, and ECSO viruses. (05 Mar 2000) |
| enteric viruses | Virus's of the genus Enterovirus. (05 Mar 2000) |
| tumour viruses, murine | Species of mammalian type c retroviruses (retroviruses type c, mammalian) that cause solid tumours or leukaemias in mice. (12 Dec 1998) |
| Koongol viruses | A serologic group of the genus Bunyavirus, comprising two species, Koongol (type species) and Wongal virus. (05 Mar 2000) |
| fibrous bacterial viruses | Deoxyribonucleoproteins that "infect" and replicate in Gram-negative bacteria having sex pili and that, unlike bacteriophage, are released from infected bacteria without damage to the cell; they seem to be of two kinds, one of which has a specificity for F pili and the other for I pili. Synonym: fibrous bacterial viruses. (05 Mar 2000) |
| filamentous bacterial viruses | Deoxyribonucleoproteins that "infect" and replicate in Gram-negative bacteria having sex pili and that, unlike bacteriophage, are released from infected bacteria without damage to the cell; they seem to be of two kinds, one of which has a specificity for F pili and the other for I pili. Synonym: fibrous bacterial viruses. (05 Mar 2000) |
| uukuniemi group viruses | A group of viruses in the genus phlebovirus of the family bunyaviridae, infecting vertebrates and vectored by ticks. Its members have not been associated with human disease though antibodies have been isolated from human sera. (12 Dec 1998) |
| foamy viruses | Retroviruses of the subfamily Spumavirinae, found in primates and other mammals; so named because of lacelike changes produced in monkey kidney cells; syncytia are also produced. Synonym: foamy agents. (05 Mar 2000) |
| lcm-lassa complex viruses | One of two groups of viruses in the arenavirus genus and considered part of the old world complex. It includes lassa virus and lymphocytic choriomeningitis virus, although the latter has worldwide distribution now. (12 Dec 1998) |
| leukaemia viruses, murine | Species of mammalian type c retroviruses (retroviruses type c, mammalian) producing leukaemia in mice. It is commonly induced by injecting filtrates of propagable tumours into newborn mice. The gross strain (gross virus) occurs spontaneously in inbred mice, but none of the other strains occurs naturally. (12 Dec 1998) |