Abstract

CCORDING to Winton,10 Rous virus neutralizing antibodies (RVNA) have been observed by Duran-Reynals in the sera of chickens from the Regional Poultry Research Laboratory (RPL) with lymphomatosis. Forty-five percent of the sera from RPL Line 9 chicks hatched in Iowa were found to contain RVNA, while the parent stock experienced 41 percent lymphomatosis.6 Kenzy and Neuzil7 found RVNA in more than 60 percent of the sera from farm flocks in Iowa with 30 to 50 percent

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