title: Lymphocyte subset distribution in apparently normal and single intradermal test-positive water buffaloes analyzed by flow cytometry.
abstract: Monoclonal antibodies (mAbs) against bovine lymphocyte cell surface antigens namely, MHC Class I, MHC class II (DP, DQ and DR), CD3, CD4, CD8, gamma delta TCR, WC1N1 and WC1N2, were tested for their reactivity on apparently normal buffalo mononuclear cells prepared from spleen, lymph nodes and peripheral blood. All the mAbs cross-reacted with the buffalo mononuclear cells. The mean (+/-SD) CD4:CD8 cell ratio in the peripheral blood of apparently normal buffaloes was 1.08+/-0.049 while in the spleen and lymph nodes it was 0.90+/-0.080 and 1.81+/-0.430, respectively. The lymphocyte subsets in the buffaloes positive for tuberculosis by the single intra dermal (SID) test was found to be altered; the CD4 cells were reduced while the CD8 and gamma delta cells were increased. The mean CD4:CD8 ratio in the SID positive buffaloes was 0.36+/-0.010.
authors.affiliation: Department of Animal Biotechnology, Madras Veterinary College, Tamil Nadu Veterinary and Animal Sciences University, Chennai 600 007, India. dhinakarraj@yahoo.com
authors.forename: G Dhinakar
authors.initials: GD
authors.lastname: Raj
authors.forename: B
authors.initials: B
authors.lastname: Mathivanan
authors.forename: K
authors.initials: K
authors.lastname: Matheswaran
authors.forename: K
authors.initials: K
authors.lastname: Nachimuthu
authors.forename: W C
authors.initials: WC
authors.lastname: Davis
mesh_terms: D000818:Animals; D002020:Buffaloes / Q000502:physiology*; D005434:Flow Cytometry / Q000662:veterinary*; D016131:Lymphocyte Subsets / Q000502:physiology*; D014374:Tuberculin Test / Q000662:veterinary*; D014376:Tuberculosis / Q000175:diagnosis / Q000662:veterinary*