title: Dynamics of lymphocyte subpopulation changes in the cecal tonsils of chickens infected with Salmonella enteritidis.
abstract: Salmonella enteritidis (SE)-induced changes in various T and B lymphocyte subpopulations in the cecal tonsils of chickens were analyzed using flow cytometry. At 1 day post-SE inoculation, the percentages of CD3(+) and CD8(+) T lymphocytes were significantly decreased in the group inoculated with 1x10(9) SE colony-forming units (CFU) (SE high) and in the group inoculated with 1x10(6) SE CFU (SE low) compared with the uninfected control group. The percentage of CD4(+) T lymphocytes was significantly increased in the SE high group compared to the uninfected and the SE low groups at 4 days after SE inoculation. The percentage of IgG(+) B lymphocytes was also significantly increased in both SE high and low groups compared to the uninfected control at 6 days post-SE inoculation. In contrast, the SE low group showed significantly fewer IgM(+) B lymphocytes compared to the uninfected and SE high groups. These results show that SE infection induces significant changes in the cecal tonsil lymphocytes subpopulations shortly following SE inoculation.
authors.affiliation: Department of Veterinary Internal Medicine, Osaka Prefecture University, Sakai, 599-8531, Osaka, Japan. ksasai@vet.osakafu-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Sasai
authors.forename: M
authors.initials: M
authors.lastname: Aita
authors.forename: H S
authors.initials: HS
authors.lastname: Lillehoj
authors.forename: T
authors.initials: T
authors.lastname: Miyamoto
authors.forename: T
authors.initials: T
authors.lastname: Fukata
authors.forename: E
authors.initials: E
authors.lastname: Baba
mesh_terms: D000818:Animals; D002432:Cecum / Q000276:immunology; D002645:Chickens; D005434:Flow Cytometry / Q000662:veterinary; D016131:Lymphocyte Subsets / Q000276:immunology*; D008221:Lymphoid Tissue / Q000166:cytology / Q000276:immunology*; D011201:Poultry Diseases / Q000276:immunology* / Q000382:microbiology; D012481:Salmonella Infections, Animal / Q000276:immunology* / Q000382:microbiology; D012477:Salmonella enteritidis / Q000276:immunology*; D013997:Time Factors