Immune profile of infectious bursal disease. III. Effect of infectious bursal disease virus on the lymphocyte responses to phytomitogens and on mixed lymphocyte reaction of chickens.
A whole-blood-culture technique was used to sequentially evaluated peripheral blood lymphocyte responses to phytohemagglutinin (PHA) and concanavalin A (Con A) of normal chickens and chickens infected at 1 day or 3 weeks of age with infectious bursal disease virus (IBDV). This method had numerous advantages over the more conventional techniques. A comparative study was made on the percentage of inhibition of responses of peripheral blood lymphocytes to PHA and Con A of 1-day- and 3-week-old IBDV-infected chickens. In both groups, there was a minimum inhibition between 3 and 4 weeks postinfection (PI) and a maximum inhibition at 6 weeks PI. A one-way mixed lymphocyte reaction (MLR) was performed using mitomycin-C-treated cells as stimulator cells obtained from chickens of genetically different strains. Lymphocytes from the experimental birds (control, 1-day-infected, and 3-week-infected groups) were used as the responder cells. The results showed that MLR response of the IBDV-infected chickens was significantly reduced compared with those of the uninfected controls. The degree of lowered response was much more severe in chickens infected at 1 day of age than in those infected at 3 weeks of age.
D000818:Animals; D002645:Chickens / Q000276:immunology*; D003208:Concanavalin A / Q000494:pharmacology; D007110:Immunity, Active; D007243:Infectious bursal disease virus / Q000276:immunology; D008213:Lymphocyte Activation; D007959:Lymphocyte Culture Test, Mixed / Q000662:veterinary*; D010835:Phytohemagglutinins / Q000494:pharmacology; D011201:Poultry Diseases / Q000276:immunology*; D012088:Reoviridae Infections / Q000276:immunology / Q000662:veterinary*
D010835:Phytohemagglutinins; D003208:Concanavalin A