If each genus within affected families is counted as potentially capable of harboring a risk zoonosis (according to the principle that many diseases are not entirely host specifi c), the number of genera potentially capable of harboring rabies viruses rises to 155 (82% of all imported taxa); potential carriers of Leptospira spp. increase to 131; M. tuberculosis complex to 124; F. tularensis to 115; B. anthracis to 113; C. burnetii to 108; and Y. pestis to 101.