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Titolo:
Principles for eradication of bovine viral diarrhoea virus (BVDV) infections in cattle populations
Autore:
Lindberg, ALE; Alenius, S;
Indirizzi:
Swedish Dairy Assoc, Res & Dev, S-75007 Uppsala, Sweden Swedish Dairy Assoc Uppsala Sweden S-75007 Dev, S-75007 Uppsala, Sweden Natl Vet Inst, S-75007 Uppsala, Sweden Natl Vet Inst Uppsala Sweden S-75007 l Vet Inst, S-75007 Uppsala, Sweden
Titolo Testata:
VETERINARY MICROBIOLOGY
fascicolo: 2-3, volume: 64, anno: 1999,
pagine: 197 - 222
SICI:
0378-1135(199901)64:2-3<197:PFEOBV>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
MUCOSAL DISEASE; DAIRY HERDS; CONTAMINATED VACCINE; SCREENING-TEST; ANTIBODIES; PESTIVIRUS; IDENTIFICATION; TRANSMISSION; OUTBREAKS; ANIMALS;
Keywords:
control; biosecurity; diagnosis; pestivirus; epidemiology; herd test;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
76
Recensione:
Indirizzi per estratti:
Indirizzo: Lindberg, ALE Swedish Dairy Assoc, Res & Dev, Box 7019, S-75007 Uppsala, Sweden Swedish Dairy Assoc Box 7019 Uppsala Sweden S-75007 Sweden
Citazione:
A.L.E. Lindberg e S. Alenius, "Principles for eradication of bovine viral diarrhoea virus (BVDV) infections in cattle populations", VET MICROB, 64(2-3), 1999, pp. 197-222

Abstract

Systematic eradication of BVDV without vaccination started in Scandinavia in 1993. In principle, the schemes include; (1) identification of non-infected and infected herds using different combinations of serological herd tests such as bulk milk tests and spot tests (sample of animals in a certain age), (2) monitoring/certification of non-infected herds by repeated sampling, applying one of the above-mentioned methods and (3) virus clearance in infected herds aimed at removing persistently infected (PI) animals in a cost- and time-efficient manner. In the virus clearance protocol described, aninitial test is performed on all animals with subsequent follow-up of calves born as well as of darns seronegative in the initial test. It is generally recommended to perform an initial antibody test on all samples. This should be done not only to screen for seronegative animals on which virus isolation should be attempted (i.e. possible PI animals), but more in order to identify non-immune animals in reproductive age, that is, the key animals in herd-level persistence of infection. In Sweden, a common finding has beenself-clearance, where the infection ceases without any other intervention than controlled introduction of new animals. Other epidemiological observations concern the course of events following virus introduction, Important risk factors for spreading BVDV are discussed, where livestock trade is perceived as the most central to control. Live vaccines, imported semen and embryos constitute special hazards, since they may act as vehicles for the introduction of new BVDV strains. The importance of making farmers aware of herd biosecurity and their own responsibility for it is stressed, and in order to maintain a favourable situation after a scheme has been concluded, effort must be put into establishing such a persisting attitude in the farmingcommunity. (C) 1999 Elsevier Science B.V, All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 15:22:37