We worm and routinely vaccinate all stock against erysepilas.
But, we do have moves off and on to shows, take visiting gilt/sows for service and have some pretty rare bloodlines that we wouldn't want to lose from our breeding herd.
If we had sheep, I think we'd vaccinate against clostridium in the pigs, as it can cause sudden death.
I think ones like parvo and pneumonia are only worth considering vaccinating against if you've had incidences or are in an 'at risk' situation.
A quick phonecall to your vet to discuss it would be a good idea though as they'll know what is/isn't in your area (and they don't usually charge for phonecalls

)
HTH
Karen
