Although the fetal lamb is unable to form circulating antiovalbumin antibodies until about 120 days of gestation, ovalbumin-specific helper T cells can be stimulated to function at an earlier age. This would suggest that the critical event responsible for the precise sequential maturation of immunologic competence to different antigens at different developmental stages is not the first appearan...

virus surface antigen (HBsAg) is known to promote viral replication, and when immunosuppressive treatment is stopped the return of immunocompetence can be followed by liver damage of varying degrees of severity, including fulminant hepatitis. Hepatitis B virus (HBV) reactivation of various degrees may develop in 20-50% of HBsAg positive patients undergoing immunosuppressive or cytostatic treatm...

A 42-year-old housewife died of drug-resistant pulmonary tuberculosis. Two sons had earlier completed a course of treatment for drug-sensitive disease. Six months after her death both sons developed sputum-positive tuberculosis with a drug resistance pattern identical to that of their mother during her last year of life, and including resistance to drugs which neither son had received. In both ...

a study was carried out to examine the effect of different levels of herbal methionine and dl-methionine on the growth performance and immunocompetence of broiler chickens fed on a corn-soybean meal diet. a total of 225 old male broiler chickens (ross 308) were used as experimental samples in a completely randomized design. they were randomly assigned to 9 treatments each of 5 replicates in eve...

PURPOSE OF REVIEW Glutamine is largely synthesized in skeletal muscles and provides fuel to rapidly dividing cells of the immune system and precursors to gluconeogenesis in the liver. Physical exercise is known to affect glutamine synthesis and to modulate glutamine uptake. Overtraining is frequently associated with reduced availability of glutamine and decreased immunocompetence. Inactivity af...