Investigation of relationship between bovine herpesvirus-1 (BHV-1) infection and fertility in repeat breeding dairy cows in family-type small dairy farms [Küçük ölçekli aile i̇şletmelerindeki repeat breeding sütçü i̇neklerde bovine herpesvirus-1 (BHV-1) enfeksiyonunun fertilite ile i̇lişkisinin araşti{dotless}ri{dotless}lmasi{dotless}]

The aim of this study was to determine the seroprevalence of bovine herpesvirus-1 (bhv-1) and investigate the relationship between bhv-1 infection and fertility in repeat breeding (rb) dairy cows in burdur province,turkey. in this study,blood serum was collected from 108 rb dairy cows and tested by enzyme linked immunosorbent assay (elisa) against bhv-1 antibodies (ab). the prevalence of bhv-1 among rb dairy cows was 9.25% (10/108). the average days open (do) for bhv-1 seropositive rb dairy cows was significantly longer than that of bhv-1 seronegative rb dairy cows (p<0.01). however,neither the age (p=0.053) nor conception rate (cr) (p=0.361) of the animals were significantly affected due to bhv-1 infection. the average time intervals between calving and the fourth insemination in non-pregnant seropositive bhv-1 dairy cows were higher than that of non-pregnant bhv-1 seronegative dairy cows (p<0.01). in addition,the average ages of pregnant bhv-1 seropositive and seronegative rb dairy cows differed significantly (p<0.05). thus,results of the current study concluded that there is a close negative relationship existed between bhv-1 infections and do in family type small dairy farms in burdur. bhv-1 infection increased the calving interval and possibly caused economic losses in rb dairy cows. moreover,further prospective studies with more number of rb dairy cows are needed to evaluate the relationship between bhv-1 infections and fertility in family type small dairy farms.