| influenza virus vaccines | Influenza virus grown in embryonated eggs and inactivated, usually by the addition of formalin; both whole virus and subunit preparations containing haemagglutinins and neuraminidase are used; because of the marked and progressive antigenic variation of the influenza viruses, the strains included are regularly changed following various outbreaks of influenza in order to include most recently isolated epidemic strains of both type A influenza and type B influenza. (05 Mar 2000) |
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| influenza viruses | Virus's of the family Orthomyxoviridae which cause influenza and influenza-like infections of humans and other animals; virus's included are influenza virus types A and B of the genus Influenzavirus, causing, respectively, influenza A and B, and influenza virus type C, which probably belongs to a separate genus and causes influenza C. (05 Mar 2000) |
| influenzal | Relating to, marked by, or resulting from influenza. (05 Mar 2000) |
| influenzal pneumonia | Pneumonia complicating influenza, pneumonia due to Haemophilus influenzae. (05 Mar 2000) |
| influenzal virus pneumonia | Serious, often fatal form of pneumonia caused by a virus of the influenzal type. Occurs in epidemics and pandemics. (05 Mar 2000) |
| influenzavirus a, b | A genus of orthomyxoviridae containing two major species (influenza a virus and influenza b virus) but many strains. A distinguishing feature is the various combinations of subtypes of the integral membrane glycoproteins haemagglutinin and neuraminidase. Hosts include several species of mammals and birds, with some interspecies transmission likely. The type species is influenza a virus. (12 Dec 1998) |
| influenzavirus c | A genus of the family orthomyxoviridae comprising viruses similar to types a and b but less common, more stable, more homogeneous, and lacking the neuraminidase protein. They have not been associated with epidemics but may cause mild influenza. Influenza c virus is the type species. (12 Dec 1998) |
| endemic influenza | Influenza, usually of a less severe type, occurring with some degree of regularity during the winter season, especially in the larger cities of the world. Synonym: influenza nostras. (05 Mar 2000) |
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| equine influenza | <veterinary, virology> A highly contagious upper respiratory infection of horses and other equids caused by equine strains of influenza virus type A. It is characterised by fever and respiratory signs similar to but more severe than those of equine rhinopneumonitis; oedema of the lower trunk and limbs (epizootic cellulitis) may occur; the disease is frequently fatal when secondary bacterial pneumonia intervenes. (05 Mar 2000) |