Isolation and characterization of 115 street rabies virus isolates from Ethiopia by using monoclonal antibodies: identification of 2 isolates as Mokola and Lagos bat viruses.

There were 115 isolates of rabies viruses recovered by tissue culture technique from 119 animal brains collected in Ethiopia. By using 17 selected antinucleocapsid monoclonal antibodies (MAbs), 113 isolates were classic street rabies viruses (serotype 1). An isolate of feline origin (Eth-16) was a Mokola virus (serotype 3) and another isolate (Eth-58, obtained from a rabid dog) was serotype 2 (Lagos bat virus). None of the 16 antiglycoprotein MAbs used neutralized the Eth-16 isolate, whereas Eth-58 was neutralized by 1 (TERA543). Antirabies vaccines prepared from Pitman-Moore and Pasteur virus strains protected mice against homologous challenge, but neither was protective against the 2 rabies-related virus isolates. The isolation of Mokola and Lagos bat viruses from domestic animals in eastern Africa is of public and veterinary concern mainly due to lack of effective vaccines against these agents and the difficulty of proper diagnosis.

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