| myxoma virus | <virology> A poxvirus (see Poxviridae) that causes myxomatosis. Originally isolated from a species of wild rabbit, Sylvilagus in Brazil, in which it causes a mild nonfatal disease, it was found to be 99% fatal in the European rabbit Oryctolagus. It causes the characteristic, sub cutaneous gelatinous swellings, myxomata and usually kills in 2-5 days. It has been used to control rabbit populations in Australia and Britain, but there are signs that they have developed immunity. (18 Nov 1997) |
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| Crimean-Congo haemorrhagic fever virus | A virus of the genus Nairovirus (family Bunyaviridae) from Africa and the southern USSR, carried by ticks (Hyalomma and Amblyomma) and found in human blood; the cause of Crimean-Congo haemorrhagic fever. (05 Mar 2000) |
| HA1 virus | parainfluenza virus type 3 |
| HA2 virus | parainfluenza virus type 1 |
| haemadsorption virus | <virology> An older term for certain influenza viruses. The two types are: haemadsorption virus type I - mostly in children, symptoms include bronchitis and pneumonia. Now called parainfluenza 3. Haemadsorption virus type 2 - is sometimes present in children who have a respiratory disease that includes high fever. Now called parainfluenza 1. (09 Oct 1997) |
| haemadsorption virus test | A method for detecting haemagglutinating viruses that is based on adherence of erythrocytes to infected cells. (05 Mar 2000) |
| haemadsorption virus type 1 | parainfluenza virus type 3 |
| haemadsorption virus type 2 | parainfluenza virus type 1 |
| croup-associated virus | parainfluenza virus type 2 |
| haemagglutinin glycoproteins, influenza virus | Membrane glycoproteins from influenza viruses which are involved in haemagglutination, virus attachment, and envelope fusion. Fourteen distinct subtypes of ha glycoproteins and nine of na glycoproteins have been identified from influenza a virus; no subtypes have been identified for influenza b or influenza c viruses. (12 Dec 1998) |
| C type virus | <molecular biology, virology> Originally C type particles identified in mouse tumour tissue and later shown to be oncogenic RNA viruses Oncovirinae) that bud from the plasma membrane of the host cell starting as a characteristic electron dense crescent. Include feline leukaemia virus, murine leukaemia and sarcoma viruses. (18 Nov 1997) |
| cucumber mosaic virus satellite | A satellite RNA (not a satellite virus) which has several types. Different cucumoviruses can act as helper viruses for different types. (12 Dec 1998) |
| haemorrhagic disease virus, epizootic | A species of orbivirus causing a fatal disease in deer. It is transmitted by flies of the genus culicoides. (12 Dec 1998) |
| haemorrhagic disease virus, rabbit | A virus species in the genus calicivirus which causes haemorrhagic disease, including haemorrhagic septicaemia, in rabbits. (12 Dec 1998) |
| haemorrhagic fever virus | <virology> Any of many viruses in the families Flaviviridae, Filoviridae and Bunyaviridae that are often spread by rodents and biting insects, these viruses cause diseasescharacterised by fever and bleeding (such as Ebola). (09 Oct 1997) |