[State of pulmonary surfactant in different species of animals].

The authors have shown that pulmonary surfactand activity in mice, rats, guinea pigs, hamsters, rabbits and dogs was within the normal limits with the fluctation of the air vesicle stability coefficient of from 0.84 to 0.93. Differences revealed in the surface active substance in different animal species depend on the frequency, expression and the nature of spontaneous pulmonary pathology. The data obtained can be used as the initial ones to study the surface pulmonary activity system under various experimentally-induced conditions of the pulmonary tissue.