Abstract
Although systemic infections with Erysipelothrix rhusiopathiae in swine are usually associated with skin lesions, vegetative endocarditis, and arthritis, infections may cause abortion or influence stillbirth rate and litter size. In a large production unit that had ceased to vaccinate against erysip-elas, an increased incidence of pre- and postparturient vulval discharge, longer farrowing intervals, and a reduction in live-born litter size were reported. Anterior vaginal swabs obtained from 21 sows shortly before parturition all yielded heavy growth of E rhusiopathiae. When a vaccination program was re-instituted, the incidence of periparturient vulval discharge decreased, the farrowing interval diminished, and live-born litter size increased. In the absence of a control group, definitive conclusions cannot be made regarding the effect of vaccination against E rhusiopathiae on sow fertility. However, it is not unreasonable to suggest that E rhusiopathiae was involved in the etiology of the reduced sow fertility in this herd and that appropriate vaccination subsequently protected the sows.
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