[Streptococcal infections, anti-streptococcal immunity and rheumatism in the builders and operators of Baikal-Amur trunk line].

The authors studied the dynamic of the indices of antistreptococcal immunity in 2750 builders and operation staff in various settlements in the BAM region; temporary loss of working capacity due to acute angina and rheumatic fever in 25172 persons in Tynda station; rheumatic fever morbidity rate among newly arrived population in 1974-1984. It was shown that situation in the BAM region reflects the complicated situation in interrelationship between social, geographical, biological and medical factors.