EN
Immune response of rats exposed to 4000 L1 T. spiralis and treated with P. granulosum was measured. Intraperitoneal injection of propionibacteria results in an increase of percentage of T lymphocytes and an activation of neutrophils. The inhibition of macrophage migration was observed till 5 DAI. In infected rats, after P. granulosum intraperitoneal injection, an increase of specific IgG₁ antibody level was not observed. The reduction of the number of muscle larvae depended on the time of P. granulosum injection after infection with T. spiralis.