SEROLOGIC RESPONSE OF LLAMAS TO A COMMERCIALLY PREPARED LEPTOSPIROSISVACCINE

Leptospirosis has been reported in llamas living in North America. LIa mas in some locations are routinely vaccinated against leptospirosis i n an attempt to prevent the disease. In order to determine if llamas r espond to a leptospirosis vaccine, 14 llamas were immunized twice at 2 week intervals with a commercially available five-way leptospirosis v accine. Blood was then collected for serum titer evaluation using a mi croagglutination technique for 5 months. Serologic response to the vac cine was low and of short duration to all five serovars, regardless of prevaccination titer. By 12 weeks postvaccination, only animals with serum titers greater than or equal to 1:200 to Leptospira pomona preva ccination still had serum titers greater than or equal to 1:200. Seven references are cited.