title: Immunodetection of Helicobacter sp. and the associated expression of ABO blood group antigens in the gastric mucosa of captive and free-living New World primates in the Amazon region.
abstract: The histo-blood group ABH antigens were first described in humans. These antigens are only present on erythrocytes from great apes and humans, while in more primitive animals they are found in tissues and body fluids. The ABH antigens are mainly distributed in tissues exposed to the external environment and potentially serve as ligands for pathogens or inhibitors of tissue connections. The objective of this paper was two-fold: (i) to determine the presence of Helicobacter sp. in the gastric mucosa of 16 captive and 24 free-living New World monkeys and (ii) to evaluate the presence of histopathological alterations related to bacterial infection and the associated expression of ABH antigens in the tissue. Stomach tissues from 13 species of monkey were assessed using haematoxylin-eosin and modified Gram staining (Hucker) methods. An immunohistochemical analysis of the tissue revealed the presence of infectious bacteria that were characteristic of the genus Helicobacter sp. The results demonstrate that various species of monkey might be naturally infected with the Helicobacter sp. and that there is an increased susceptibility to infection. This study serves as a comparative analysis of infection between human and non-human primates and indicates the presence of a new species of Helicobacter.
authors.affiliation: Universidade Federal do Pará, Belém, PA, Brazil. delia@ufpa.br
authors.forename: Délia Cristina Figueira
authors.initials: DC
authors.lastname: Aguiar
authors.forename: Vera Lúcia de Souza
authors.initials: VL
authors.lastname: Barros
authors.forename: Washington Luiz Assunção
authors.initials: WL
authors.lastname: Pereira
authors.forename: Rosane do Socorro Pompeu de
authors.initials: Rdo S
authors.lastname: Loiola
authors.forename: Gyselly Cássia Bastos de
authors.initials: GC
authors.lastname: Matos
authors.forename: João
authors.initials: J
authors.lastname: Valsecchi
authors.forename: Tereza Cristina Oliveira
authors.initials: TC
authors.lastname: Corvelo
mesh_terms: D000017:ABO Blood-Group System / Q000032:analysis / Q000276:immunology*; D000818:Animals; D015415:Biomarkers / Q000032:analysis; D005753:Gastric Mucosa / Q000276:immunology / Q000382:microbiology*; D016998:Helicobacter / Q000145:classification / Q000276:immunology; D016481:Helicobacter Infections / Q000175:diagnosis / Q000276:immunology / Q000382:microbiology / Q000662:veterinary*; D007150:Immunohistochemistry; D051078:Platyrrhini / Q000382:microbiology*
chemical_list: D000017:ABO Blood-Group System; D015415:Biomarkers