Contact Transmission of Poliomyelitis Virus Among Monkeys.

Abstract

Poliomyelitis virus was fed to 4 groups of 5 monkeys each which were subsequently caged with an equal number of normal animals. All of those fed virus became infected as evidenced by either the development of paralysis of virus excretion accompanied by an antibody rise. Two of the contact monkeys became paralyzed and although one of these and 10 others excreted virus briefly, antibodies developed and were demonstrated only in the 2 paralyzed animals suggesting that sub-clinical infection did not occur.