Effects of infection with bovine virus diarrhoea virus on health and reproductive performance in 213 dairy herds in one county in Sweden

Bulk tank milk samples, collected twice with a 1 year interval, from 213 Swedish dairy herds with no vaccination programme against bovine virus diarrhoea virus (BVDV), were tested for antibodies to BVDV using an indirect enzyme-linked immunosorbent assay. The herds were classified into four differen...

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Bibliographic Details
Published in:Preventive veterinary medicine 1995-06, Vol.23 (3), p.229-237
Main Authors: Niskanen, R., Emanuelson, U., Sundberg, J., Larsson, B., Alenius, S.
Format: Article
Language:English
Subjects:
ANIMAL HEALTH
Bovine virus diarrhoea virus
Bulk tank milk
COWS
DIARREA
DIARRHEE
DIARRHOEA
Health
Herd immunity
PERFORMANCE DE REPRODUCTION
REPRODUCTIVE PERFORMANCE
REPRODUCTIVIDAD
SANIDAD ANIMAL
SANTE ANIMALE
SUECIA
SUEDE
SWEDEN
VACA
VACHE
VIROSE
VIROSES
VIROSIS
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Summary:Bulk tank milk samples, collected twice with a 1 year interval, from 213 Swedish dairy herds with no vaccination programme against bovine virus diarrhoea virus (BVDV), were tested for antibodies to BVDV using an indirect enzyme-linked immunosorbent assay. The herds were classified into four different BVDV groupings based on changes in the estimated prevalence of BVDV antibody-positive cows in the herds. The estimated mean prevalences of BVDV antibody-positive cows were maintained as > 80% in 58 (27.2%) and as < 10% in 84 (39.4%) of the herds. A recent introduction of the infection was deemed to have occurred in seven (3.3%) of the herds studied. The BVDV groups were compared with regard to parameters related to disease and fertility at herd level. Relationships were assessed using logistic and ordinary linear regression analyses. The risks for clinical mastitis, retained placenta and oestrus-stimulating treatments were higher and the calving intervals were longer in BVDV infected herds, i.e. those herds with an increasing or maintained high prevalence of BVDV antibody-positive cows.
ISSN:0167-5877
1873-1716
DOI:10.1016/0167-5877(94)00437-N