Johne's Dam and Her Calf
I was asked about Johne's control on a dairy and managing the calving process to reduce risk of transmission.
In my opinion, the risk of transmitting Johne's [mycobacterum avium ss. paratuberculosis] to calves can be reduced by following three straightforward steps:
1. For the calf born to a known Johne's dam, do not feed this dam's colostrum to any calf.
2. For the calf born to a known Johne's dam, take the calf away from the dam as soon as practical - always before the calf stands. Remember that mother (hair coat, licking the calf, fecal contamination of calf surroundings) is a pathogen factory.
3. For all calves, if possible calve known Johne's dams in a place separate from where other calves are being born - isolate the feces from known dams as much as possible from all newborn calves.