The occurrence and distribution of Salmonella types in fowl; isolation from hen's eggs

Using selective media, an examination of 2400 hens' eggs was made to determine the incidence of Salmonella types in the egg or on the shell. The contents of 1000 eggs laids by a flock of presumably normal hens did not yield any representatives of the Salmonella group. Of a similar number of eggs produced by a flock of 55 known pullorum reactors, 61 were found to contain S. pullorum; no other Salmonella organisms were isolated. The exteriors of an additional 400 eggs obtained from the latter source failed to produce any Salmonella types.