The condition of piglet immune system during post-weaning period depending on the sex and stress-reactivity

The immune system of 90-day old piglets SM-1 Novosibirsk breed depends on sex and stress-reactivity. Stress-reactivity was measured using halothane test. immunologic testing performed 30 days after weaning. Our results show that overall piglet demonstrated high proliferative activity T- B- immunocompetent cells with active formation mature T-and B-lymphocytes did not signs immunosuppression. Compared to guilts, barrows had higher concentration leucocytes, B-lymphocytes, killer-supressor T-cells, activated poorly differentiated T-lymphocytes. Gilts production inductor-helper IgM IgG when compared barrows. Stress-resistant whereas stress-sensitive T-lymphocytes, supressor-killer T-cells thymus than T-cells. intensive antibody synthesis, however, stress-resistant gilts synthesis gilts. In immature T-lymphocytes mainly into adaptivity barrow characterized by circulatory IgM. Stress-sensitive lower levels T-lymphophoesis