title: Simultaneous flow cytometric analysis of phagocytosis and oxidative burst activity in equine leukocytes.
abstract: This paper describes a method for simultaneously measuring phagocytosis and oxidative burst activity in equine peripheral blood leukocytes by flow cytometry. Opsonized propidium iodide-labelled Staphylococcus aureus (PI-Sa) was used to measure the uptake of bacteria by equine phacocytes and the oxidative burst activity by oxidation of dihydrorhodamine 123. The requirements to achieve optimal activity of phagocytosis and oxidative burst are described. The advantage of the simultaneous technique is that it provides both independent and comparative values for phagocytosis and the oxidative burst, for the detection of impaired mechanisms of microbial destruction. Furthermore, the technique allows evaluation of opsonization activity in this context.
authors.affiliation: The James A. Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853, USA. mbf6@cornell.edu
authors.forename: M J B F
authors.initials: MJ
authors.lastname: Flaminio
authors.forename: B R
authors.initials: BR
authors.lastname: Rush
authors.forename: E G
authors.initials: EG
authors.lastname: Davis
authors.forename: K
authors.initials: K
authors.lastname: Hennessy
authors.forename: W
authors.initials: W
authors.lastname: Shuman
authors.forename: M J
authors.initials: MJ
authors.lastname: Wilkerson
mesh_terms: D000818:Animals; D005434:Flow Cytometry / Q000379:methods*; D005456:Fluorescent Dyes / Q000378:metabolism; D006736:Horses / Q000097:blood / Q000276:immunology* / Q000382:microbiology; D007962:Leukocytes / Q000166:cytology* / Q000276:immunology / Q000378:metabolism*; D010084:Oxidation-Reduction; D010587:Phagocytosis; D011419:Propidium / Q000378:metabolism; D016897:Respiratory Burst; D012235:Rhodamines / Q000378:metabolism; D013211:Staphylococcus aureus / Q000276:immunology
chemical_list: D005456:Fluorescent Dyes; D012235:Rhodamines; C058319:dihydrorhodamine 123; D011419:Propidium