There is a new Lyme bacterin on the market that Rhone-Merieux has
produced using recombinant gene techniques. This bacterin only uses a portion
of the bacteria which the body defenses recognize and form antibodies against.
Because the whole Lyme bacteria is not present, it appears that there will
not be the problem of the vaccine causing symptoms of Lyme disease. In
addition, this bacterin does have a validated one year duration of immunity.
It is a new product and like all new products there is a period when everyone
looks hard for previously unknown reactions but if "vaccination" against
Lyme disease seems necessary in your area, I'd definitely use this one.