Mortality of Fowl Embryos Inoculated with Avianized Strains of Rinderpest Virus

Abstract

The mean mortality of fowl embryos inoculated into the yolk sac with the avianized bovine strain of rinderpest virus was 89•9 ± 4• 1 per cent. With the avianized lapinized strain it was 5 I• 1 ± 14• 1 per cent. The curves relating numbers of deaths to days after inoculation were similar with the 2 strains. A significant factor influencing the mortality was the age of the fowl embryo at the time of inoculation.