Right now there is no immunization for Lyme disease. So really it is impossible to prevent, witch makes people weary.
If your going to a place with many bugs and ticks you should watch for ticks and remove them immediately, and make sure to get tested for Lyme.
There is really no restrictions on getting tested for it, but if you have it you should make sure you are nit carrying the tick still.
Lyme disease can effect food supply because it is carried by ticks witch live anywhere. On the animals you butcher and eat I may be on them. Although I don't cause a significant effect on the food supply itself.