Recent nation wide studies have demonstrated that while most dairy herds are free of Hardjo and Pomona strains of Leptospriosis (the ones in the Lepto vaccine) Lepto Tarassovi is an emerging problem, this strain is not covered by vaccination and can spread to cattle through wildlife such as rats, mice, hedgehogs etc. Obviously vaccination is not currently an option, so it makes good sense to control rodent populations around cow sheds, feed pads etc. to minimize the chances of infection.
Owners should also ensure their workers practice good hygiene;
- Wash hands
- No smoking while milking or handling cattle
- Cover cuts and wounds
- Wear protective clothing/ gloves/ overalls.
Remember it is essential to vaccinate calves for Lepto before the calves become infected (vaccination will not cure infection, it prevents infection). For spring calving dairy herds this means 2 vaccinations need to be given before Christmas.