Prolonged Detection of Bovine Viral Diarrhoea Virus Infection in the Semen of Bulls.
Viruses
; 12(6)2020 06 22.
Article
em En
| MEDLINE
| ID: mdl-32580423
ABSTRACT
Infection of bulls with bovine viral diarrhoea virus (BVDV) can result in the development of virus persistence, confined to the reproductive tract. These bulls develop a normal immune response with high neutralizing antibody titres. However, BVDV can be excreted in the semen for a prolonged period. Although relatively rare, in this study we describe six separate cases in bulls being prepared for admission to artificial breeding centres. Semen samples were tested in a pan-Pestivirus-reactive real-time PCR assay and viral RNA was detected in semen from five of the bulls for three to eight months after infection. In one bull, virus was detected at low levels for more than five years. This bull was found to have one small testis. When slaughtered, virus was only detected in the abnormal testis. The low levels of BVDV in the semen of these bulls were only intermittently detected by virus isolation in cell culture. This virus-contaminated semen presents a biosecurity risk and confirms the need to screen all batches of semen from bulls that have been previously infected with BVDV. The use of real-time PCR is recommended as the preferred laboratory assay for this purpose.
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Base de dados:
MEDLINE
Assunto principal:
Sêmen
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Doença das Mucosas por Vírus da Diarreia Viral Bovina
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Vírus da Diarreia Viral Bovina
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article