Fowl adenovirus 7 YR36 X11 FadV7 A

serotype of fowl adenovirus E.

fowl adenovirus 8a (TR59, T-8, CFA40) (FadV-8a) A serotype of fowl adenovirus E.

fowl adenovirus 8b (764, B3) (FadV-8b) A

serotype of fowl adenovirus E.

serotype of fowl adenovirus D.

fowl adenovirus 10 (C-2B, M11, CFA20) A

serotype of fowl adenovirus C.

fowl adenovirus 11 (380) (FadV-11) A

serotype of fowl adenovirus D.

fowl calicivirus (FCV) An unassigned virus in the family Caliciviridae that has not been well characterized.

fowl diphtheria virus Synonym for Fowlpox virus.

fowl leukemia virus See Avian leukosis virus.

fowl paralysis virus Synonym for Gallid herpesvirus 2.

fowlpest A term used to describe infection with Newcastle disease virus but occasionally applied also to influenza A avian (fowl plague) virus infection.

Barry RD et al (1964) Vet Rec 76, 1316

fowl plague (classical) A severe epidemic disease of poultry with up to 100% mortality caused by highly pathogenic strains of avian influenza virus. See Influenza virus A avian.

fowlpox subgroup viruses Synonym for avipoxvirus.

Fowlpox virus (FWPV) The type species of the genus Avipoxvirus containing a number of strains varying in host range but otherwise not clearly separable. Virions have a high lipid content. The genome DNA is 300kb in length, structurally similar to other poxvirus DNAs, with terminal hairpin loops linking the two strands. The use of Fowlpox virus as a recombinant DNA vector is under development. Replicates on CAM producing pocks and in cell cultures of chick embryo with CPE. The disease caused in fowls has a course of 3-4 weeks. There are proliferative lesions followed by scabbing on the skin, especially of the head, sometimes of feet and vent. Involvement of the trachea is called 'fowl diphtheria'. There may be eye lesions. Many species are susceptible. Transmitted by contact and by mosquitoes which may remain infected for at least 210 days. Control is by a vaccine attenuated in eggs. Synonyms: birdpox virus; epithelioma contagiosum virus; fowl diphtheria virus; poxvirus avium.

Boyle DB and Heine HG (1993) Immun Cell Biol 71, 391

Tripathy DN (1991) In Diseases of Poultry, edited by BW Calnek. Ames: Iowa University Press, p. 583

fox encephalitis virus Synonym for Canine adenovirus.

FPLV See Feline panleukopenia virus.

frameshift A process by which two or more proteins can be specified by a stretch of viral mRNA which is long enough to code for little more than one of them. The mRNA is translated from different starting points: A^B and C^D. The triplet code is read in a different frame in each case. A stretch of viral genome can similarly code for different mRNAs. Frameshift mutations may arise from insertion or deletion of one or more nucleotides (except three or multiples of three), and may result in termination or alteration of the protein products of a gene. Coronaviruses and retroviruses employ a frameshift during replication in order to express certain genes.

Fraser Point virus A serotype of Hughes virus in the genus Nairovirus.

freeze-drying See lyophilization.

freeze-fracture A method for preparing samples for electron microscopy. They are frozen rapidly at very low temperature and then the brittle material is fractured. The exposed surfaces may be etched to reveal further details.

Freund's adjuvant A mixture of mineral oil and emulsifier (and, in the complete adjuvant, killed mycobacteria) with which an antigen is emulsified before intramuscular or subcutaneous injection. The antigen is released slowly into the blood stream, often leading to the production of a higher antibody titer.

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