[The detection of pathogenicity factors in the nematode Trichinella spiralis at different stages of its development]. / Vyiavlenie faktorov patogennosti u nematody Trichinella spiralis na raznykh stadiiakh razvitiia.

The study of water soluble proteins of Trichinella spiralis has discovered for the first time some protein fractions having neiraminedase, haemagglutinative and cytotoxic activities. The presence of hyaluronidase was confirmed and its activity both for water soluble and cuticle proteins of the trichinella was examined. The haemagglutinin and cytotoxin of the trichinella have an antigen specificity. The presence of active molecules is considered as the factors of pathogenicity. These pathogenic factors were discovered in the invading larvae and adult Trichinella, while they were not found in young larvae.

[The reproductive activity of Trichinella spiralis in the early stages of cultivation on artificial nutrient media]. / Reproduktivnaia aktivnost' Trichinella spiralis na rannikh stadiiakh kul'tivirovaniia v iskusstvennykh pitatel'nykh sredakh.

Reproductive activity of mature Trichinella spiralis was studied during its cultivation in three nutrient media. Most active hatching of Trichinella larvae was observed in Erl's saline, less active in Eagle's medium and in the lactalbumin hydrolyzate medium. In Erl's medium the hatching of larvae accounted for 80% of their total mass for the first four hours of the experiment and the absolute number of larvae was 2.5 to 10 times greater than that in the two other media. The use of Erl's medium makes it possible to obtain a considerable number of Trichinella larvae in 4 to 6 hours of cultivation.