There are multiple clinical signs of salmonellosis. The most common are diarrhoea and abortion, predominantly caused by Salmonella typhimurium and Salmonella dublin respectively. Once infected cattle can acquire immunity and recover or remain carriers. These carriers can shed the bacteria constantly, intermittently or become latent carriers.
Economic implications are not only restricted to treatment costs and mortality, but significantly affect productivity subsequently profitability.
Production losses:
- Decreased milk production
- Can lead to fewer calves/cow/year
- Decreased daily weight gain
- Ill thrift
Abortions caused by Salmonella dublin in spring born dairy herds likely commence in autumn and peaking in November. It is therefore recommended to vaccinate pregnant heifers with a primary course, or a booster, at least 2-3 weeks before this main risk period.
Vaccination protocols for Bovilis Bovivac S:
- Aged 6 months – adult: Two 5ml doses 21 days apart
- Revaccination annually 2-3 weeks before the main risk period, or 3-4 weeks pre-calving provided a primary vaccination course has been completed by subcutaneous administration
- Calves from approx. 3 weeks to 6 months can start their primary vaccination course: Two 2ml doses 14-21 days apart
Implementing a vaccination programme in addition with strict management and good husbandry practices will provide cattle with immunity to reduce infections. Contact our team today to schedule your vaccination.