OBSERVATIONS ON THE INFECTION OF CHICK EMBRYOS WITH BACTERIUM TULARENSE, BRUCELLA, AND PASTEURELLA PESTIS

Abstract
1. Comparison of the infections of chick embryos by the chorio-allantoic route indicates that Bacterium tularense and Brucella suis, abortus, and melitensis exhibit varying degrees of facultative intracellular parasitism. Pasteurella pestis is adapted to rapid proliferation and spread in the intercellular fluids.