| dengue haemorrhagic fever | <microbiology> A tropical disease caused by dengue virus (Arbovirus), that is transmitted by the bite of an infected mosquito of the genus Aedes). Four severity grades of the illness are seen: grade I (fever and constitutional symptoms), grade II (grade I plus spontaneous bleeding of skin, gums or gastrointestinal tract), grade III (grade II plus agitation and circulatory failure) and grade IV (profound shock). Grade I infection is seen most frequently in world travelers, where it is usually self-limited and rarely fatal. The other grades are referred to as dengue haemorrhagic fever and are often fatal. Dengue haemorrhagic fever appears to be an infection by one of the other dengue viruses. Prior immunity to a different dengue virus type appears to be important in the development of the more serious haemorrhagic form. Vaccines are available. Protection from mosquitoes is an important preventive measure. (27 Sep 1997) |
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| dengue fever | <microbiology> A tropical disease caused by dengue virus (Arbovirus), that is transmitted by the bite of an infected mosquito of the genus Aedes). Four severity grades of the illness are seen: grade I (fever and constitutional symptoms), grade II (grade I plus spontaneous bleeding of skin, gums or gastrointestinal tract), grade III (grade II plus agitation and circulatory failure) and grade IV (profound shock). Grade I infection is seen most frequently in world travelers, where it is usually self-limited and rarely fatal. The other grades are referred to as dengue haemorrhagic fever and are often fatal. Dengue haemorrhagic fever appears to be an infection by one of the other dengue viruses. Prior immunity to a different dengue virus type appears to be important in the development of the more serious haemorrhagic form. Vaccines are available. Protection from mosquitoes is an important preventive measure. (27 Sep 1997) |
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| dengue | Tropical disease caused by a flavivirus (one of the arboviruses), transmitted by mosquitoes. A more serious complication is dengue shock syndrome, a haemorrhagic fever probably caused by an immune complex hypersensitivity after re exposure. (18 Nov 1997) |
| dengue shock syndrome | <syndrome> Dengue fever of grade III or IV severity. (05 Mar 2000) |
| dengue virus | A species of the genus flavivirus which causes an acute febrile and sometimes haemorrhagic disease in man. Dengue is mosquito-borne and four serotypes are known. (12 Dec 1998) |
| African haemorrhagic fever | Haemorrhagic fever associated with the morphologically similar but antigenically distinct Marburg and Ebola viruses. See: viral haemorrhagic fever. (05 Mar 2000) |
| Argentinean haemorrhagic fever | A form of haemorrhagic fever observed in South America, seemingly transmitted by contact from rodents to man and caused by the Junin virus, a member of the family Arenaviridae. (05 Mar 2000) |
| Argentine haemorrhagic fever virus | A member of the Arenaviridae. (05 Mar 2000) |
| bolivian haemorrhagic fever | A febrile illness similar to Argentinian haemorrhagic fever but caused by the Machupo virus, a member of Arenaviridae. (27 Sep 1997) |
| Bolivian haemorrhagic fever virus | A member of the Arenavirus group of single-stranded RNA viruses also known as Machupo virus; primary reservoir in rodents; produces multiple abnormalities in coagulation system including widespread capillary leak syndrome, which can be fatal. (05 Mar 2000) |
| Brazilian haemorrhagic fever | Fulminating sepsis, usually beginning with conjunctivitis, characterised by purpuric skin lesions, a high fatality rate; thought to be due to Haemophilus aegyptius. Synonym: Brazilian haemorrhagic fever, Brazilian purpuric fever. (05 Mar 2000) |
| Manchurian haemorrhagic fever | A form of epidemic haemorrhagic fever caused by the Hantaan virus of the genus hantavirus. Synonym: Manchurian haemorrhagic fever. (05 Mar 2000) |
| viral haemorrhagic fever | An epidemic viral illness seen in southern Sudan and Zaire, caused by the Ebola virus. The illness is characterised by fever, malaise, muscle aches, respiratory symptoms, diarrhoea, vomiting, epistaxis, haemoptysis, haematemesis, rash, tremors and subconjunctival haemorrhages. Transmitted by close bodily contact with infected individuals (blood, faeces and body fluids). Incubation is-21 days with initial symptoms of fever and headache. There is no specific treatment and death can occur within 10 days. (27 Sep 1997) |
| viral haemorrhagic fever virus | <virology> An epidemic viral illness seen in southern Sudan and Zaire, caused by the Ebola virus. The illness is characterised by fever, malaise, muscle aches, respiratory symptoms, diarrhoea, vomiting, epistaxis, haemoptysis, haematemesis, rash, tremors and subconjunctival haemorrhages. Transmitted by close bodily contact with infected individuals (blood, faeces and body fluids). Incubation is-21 days with initial symptoms of fever and headache. There is no specific treatment and death can occur within 10 days. (27 Sep 1997) |
| Philippine haemorrhagic fever | Severe arbovirus infection with haemorrhagic manifestations, considerable mortality, probably due to mosquito borne dengue virus; seen in tropical and subtropical urban areas of southeast Asia, South Pacific, Australia, Central and South America, and the Caribbean islands. (05 Mar 2000) |
| Crimean-Congo haemorrhagic fever | A form of haemorrhagic fever distinct from Omsk haemorrhagic fever, occurring in central Russia, transmitted by species of the tick Hyalomma, and caused by Crimean-Congo haemorrhagic fever virus, a member of the Bunyaviridae family; horses are the chief reservoir of human infection; characterised by abrupt onset, high fever, headache, myalgia, widespread petechial haemorrhagic lesions, gastrointestinal bleeding, high fatality rate. Synonym: African tick fever. (05 Mar 2000) |