The propagation of a virulent goat pleuropneumonia-like organism in the chick embryo.

Although the organisms of the pleuropneumonia group isolated from man (Paine et al., 1950; Keller and Morton, 1954) and from several species of animals (Tang et al., 1936; Delaplane, 1948; Hoyt et al., 1951; Sheriff and Piercy, 1952) have been cultivated in the chick embryo, the goat pleuropneumonia-like organism (PPLO) recently isolated from goats and reported by us, to our knowledge, has not been studied in this medium. It is the purpose of this paper to describe the chick embryo propagation of a virulent goat PPLO isolated for the first time on this continent (Cordy et al., 1955, in press).