Key result
Congenital BVDV infection in a pig demonstrates a lifelong viraemic carrier state lasting 26 months.
Why the study?
The existence and characteristics of a lifelong carrier state of non-cytopathic bovine virus diarrhoea virus in pigs and its implications for disease control were not well described.
Population
13 pigs of a litter congenitally infected with BVDV
Comparison
Natural disease course, vaccination responses, and superinfection with cytopathic BVDV strains
Design
Case report
Follow-up
Up to 26 months
Authors
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Supports hypothesis of lifelong BVDV carriage in pigs; leaves open impact on bovine eradication programs.
Case Report (n=13)
Pigs can become lifelong healthy carriers of bovine virus diarrhoea virus, which should be considered in disease control and eradication measures.
Terpstra et al. (1997) conducted a case report in Congenital persistent infection of bovine virus diarrhoea virus (BVDV) (n=13). Congenital BVDV infection was evaluated on Clinical, virological and immunological observations. A pig congenitally infected with BVDV remained viraemic and immunotolerant for 26 months, excreting virus in oropharyngeal fluid, urine, and semen, demonstrating a lifelong carrier state.
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