Molecular epidemiology of rabies in bat-eared foxes (Otocyon megalotis) in South Africa.

A panel of 124 rabies viruses from wildlife host species (principally the bat-eared fox, Otocyon megalotis) and domestic carnivore species were collected between 1980 and 2005 from a region of South Africa associated with endemic bat-eared fox rabies. We have studied the molecular epidemiology of bat-eared fox rabies by virtue of nucleotide sequence analyses of PCR amplicons specific to the variable G-L intergenic region as well as the conserved nucleoprotein gene of each of the rabies viruses in this South African panel. Although it was demonstrated that all of these viruses were very closely related, they could be segregated into two major phylogenetic groups. The data presented in this paper complement antigenic and surveillance data on rabies in this host species in South Africa. Most importantly our data support a hypothesis that the bat-eared fox independently maintains rabies cycles in specific geographical loci. This is the first molecular epidemiological investigation describing rabies transmission dynamics in this wildlife carnivore host species in South Africa.