Depending on the species of animals that plays role as a major vector, three rabies cycles have been distinguished (Radostits et al., 2000). The first is the urban rabies cycle, in which dogs are the main reservoir host. This cycle predominates in areas of Africa, Asia, and Central and South America where the proportion of unvaccinated and semi-owned or stray dogs is high. It has been virtually eliminated in North America and Europe; although sporadic cases occur in dogs infected by wild animals, where the urban cycle is not perpetuated in the canine population (CFSPH, 2009). The second is the sylvatic (wildlife) cycle of rabies in which wild carnivores such as jackals, foxes; skunks, mongooses, wolves etc. do play an important role as vector.
