[The threshold levels of the stapedius reflex depending on the relationship between the gas pressure in the external auditory meatus and the middle ear].

The objective of the present work was to detect and elucidate effects of a single factor (gas pressure) responsible for the threshold levels of stapedius reflex. It was shown that the threshold reflexes were recorded at 105 dB SPL when the gas pressure in the external auditory meatus decreased by 150-200 pPa against the atmospheric pressure and when it increased by 100-150 pPa. These effects can be accounted for by the reduced compliance of the tympanic membrane and different changes in the state of the auditory ossicles undergoing compression and tension.

[Antigenic characteristics of morbillivirus isolates from Baikal seals].

Four morbillivirus strains were isolated from the Baikal seals Phoca sibirica. The antigen difference between these strains was studied using ELISA with different immune sera and monoclonal antibodies. The assay data indicated three different antigen variants of morbillivirus.