title: Campylobacter fetus diagnosis: direct immunofluorescence comparing chicken IgY and rabbit IgG conjugates.
abstract: In Argentina Bovine Genital Campylobacteriosis is routinely diagnosed by direct immunofluorescence test. Generally, the hyperimmune sera used for this test are obtained from rabbits and less often from goats. In this work, a chicken egg yolk immunoglobulin (IgY) extract was conjugated and its ability to detect campylobacters with the regular conjugate prepared with rabbit sera was comparatively evaluated. Both conjugates were independently evaluated by two laboratories, named "Azul" (Lab A) and "Balcarce" (Lab B). Animals were immunised with formalin inactivated Campylobacter (C.) fetus cells. Chicken IgY and rabbit IgG were conjugated with fluorescein isothiocyanate and used to comparatively examine strains of C. fetus subspp., other Campylobacter spp. and different bacterial species. Both conjugates had a high percentage rate of detection for C. fetus. IgY had less background due to unspecific fluorescence than IgG. IgY is a cheap, bloodless and very productive method. IgY can replace mammal immunoglobulins for C. fetus diagnosis.
authors.affiliation: Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria de Balcarce, Departamento de Producción Animal, Provincia de Buenos Aires, Argentina.
authors.forename: A
authors.initials: A
authors.lastname: Cipolla
authors.forename: J
authors.initials: J
authors.lastname: Cordeviola
authors.forename: H
authors.initials: H
authors.lastname: Terzolo
authors.forename: G
authors.initials: G
authors.lastname: Combessies
authors.forename: J
authors.initials: J
authors.lastname: Bardón
authors.forename: N
authors.initials: N
authors.lastname: Ramón
authors.forename: A
authors.initials: A
authors.lastname: Martínez
authors.forename: D
authors.initials: D
authors.lastname: Medina
authors.forename: C
authors.initials: C
authors.lastname: Morsella
authors.forename: R
authors.initials: R
authors.lastname: Malena
mesh_terms: D000818:Animals; D001118:Argentina; D001428:Bacterial Vaccines; D002169:Campylobacter Infections / Q000175:diagnosis / Q000662:veterinary*; D002168:Campylobacter fetus / Q000276:immunology; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis* / Q000382:microbiology; D002645:Chickens; D004530:Egg Yolk; D016650:Fluorescein-5-isothiocyanate; D005455:Fluorescent Antibody Technique; D007074:Immunoglobulin G; D007136:Immunoglobulins; D011817:Rabbits; D012680:Sensitivity and Specificity; D012757:Sheep Diseases / Q000175:diagnosis / Q000382:microbiology
chemical_list: D001428:Bacterial Vaccines; C016512:IgY; D007074:Immunoglobulin G; D007136:Immunoglobulins; D016650:Fluorescein-5-isothiocyanate