Preparation and characterization of monoclonal antibodies against an avian reovirus.

Thirteen monoclonal antibodies against avian reovirus strain Uchida were derived. Of the 13 antibodies, three (MAb1, MAb2, and MAb3) had the ability to neutralize the infectivity of the virus. MAb1 neutralized strains Uchida, CS-108, and TS-142 equally. MAb2 neutralized the same three strains, but the activity of neutralization was 10 times higher against Uchida than against CS-108 and TS-142. MAb3 neutralized only strain Uchida. It seems that MAb1 and MAb2 have a rather broad neutralization activity and that MAb3 has a type-specific activity. These data indicate that there are both type-specific and more broadly specific neutralization epitopes in avian reovirus particles, as in mammalian reoviruses. In Western blot analysis, MAb1 bound to a sigma protein of strain Uchida, so it was suggested that this protein carries the epitope of the less specific neutralizing activity.

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