A German study showed that about 1/3 of Tibetan Terriers are carriers, but no affected dogs has been produced since the introduction of the DNA test as the German breed club requirements forbid carriers from being bred together.
德国的一项研究表明，大约1/3的西藏㹴是病毒携带者，但自从将DNA测试作为德国犬业协会的犬种引入条例以来，就没有产生过受影响的犬。