title: Evaluation of immune response in turbot (Psetta maxima L.) tenacibaculosis: haematological and immunohistochemical studies.
abstract: Tenacibaculum maritimum is a Gram-negative bacterium that causes large losses in farmed turbot, Psetta maxima (L.). Main lesions included erosive and ulcerative skin injuries in different locations in the body of the fish. This study was set up to gain insights into the immune response of the turbot against this bacterial infection. To determine the variations in the peripheral blood leukocytes a minimum of 200 leukocytes in blood smears were counted. The presence of immunoglobulin positive (Ig(+)) cells in spleen, kidney, intestine, thymus and skin from turbot experimentally infected with T. maritimum were studied using an immunohistochemical method. In fish challenged with the bacterium the percentage of circulating granulocytes, lymphocytes and trombocytes showed significant differences at different points of sampling. Moreover, the number of Ig(+) cells significantly increased in the spleen, kidney, intestine and thymus. In the skin a strong immunoreactivity was observed in the interstitial liquid in damaged areas. The results obtained in this study indicated that the infection by T. maritimum in turbot induced an immune response that involved changes in the number of peripheral blood leukocytes and in the number and distribution of Ig(+) cells.
authors.affiliation: Departamento de Ciencias Clínicas Veterinarias, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain. Electronic address: luisdaniel.failde@usc.es.
authors.forename: Luis Daniel
authors.initials: LD
authors.lastname: Faílde
authors.affiliation: Departamento de Ciencias Clínicas Veterinarias, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain.
authors.forename: Ana Paula
authors.initials: AP
authors.lastname: Losada
authors.affiliation: Departamento de Anatomía y Producción Animal, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain.
authors.forename: Roberto
authors.initials: R
authors.lastname: Bermúdez
authors.affiliation: Departamento de Microbiología y Parasitología, Facultad de Biología, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
authors.forename: Ysabel
authors.initials: Y
authors.lastname: Santos
authors.affiliation: Departamento de Ciencias Clínicas Veterinarias, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain. Electronic address: misabel.quiroga@usc.es.
authors.forename: M Isabel
authors.initials: MI
authors.lastname: Quiroga
mesh_terms: D000825:Animal Structures / Q000473:pathology; D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis; D005393:Fish Diseases / Q000276:immunology* / Q000382:microbiology* / Q000473:pathology; D005412:Flatfishes; D045826:Flavobacteriaceae Infections / Q000276:immunology / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D007150:Immunohistochemistry; D007962:Leukocytes / Q000276:immunology; D007963:Leukocytes, Mononuclear / Q000276:immunology; D060493:Tenacibaculum / Q000302:isolation & purification*; D013997:Time Factors
chemical_list: D000907:Antibodies, Bacterial
keywords: Immune response; Immunohistochemistry; Immunology; Psetta maxima; Tenacibaculum maritimum