title: Serum antibodies to oral anaerobic bacteria in patients with rheumatoid arthritis.
abstract: BACKGROUND
  This study was conducted to determine the component that causes the disease in rheumatoid arthritis (RA), which shows great resemblance to periodontitis in a pathologic context.
  
  
  METHODS
  Within this study, the pathogen-specific IgG levels formed against Porphyromonas gingivalis FDC 381, Prevotella melaninogenica ATCC 25845, Actinobacillus actinomycetemcomitans Y4, Bacteroides forsythus ATCC 43047, and Prevotella intermedia 25611 oral bacteria were researched from the blood serum samples of 30 RA patients and 20 healthy controls with the enzyme-linked immunosorbent assay (ELISA) method.
  
  
  RESULTS
  The IgG levels of P gingivalis, P intermedia, P melaninogenica, and B forsythus were found to be significantly higher in RA patients when compared with those of the controls. Of the other bacteria antibodies, A actinomycetemcomitans was not found at greater levels in RA serum samples in comparison with the healthy samples.
  
  
  CONCLUSIONS
  The antibodies formed against P gingivalis, P intermedia, P melaninogenica, and B forsythus could be important to the etiopathogenesis of RA.
authors.affiliation: Department of Physical Medicine and Rehabilitation, Nazilli State Hospital, Nazilli, Aydin, Turkey. yaseminogrendik@superonline.com
authors.forename: Mesut
authors.initials: M
authors.lastname: Ogrendik
authors.forename: Siranus
authors.initials: S
authors.lastname: Kokino
authors.forename: Ferda
authors.initials: F
authors.lastname: Ozdemir
authors.forename: Philip S
authors.initials: PS
authors.lastname: Bird
authors.forename: Stephen
authors.initials: S
authors.lastname: Hamlet
mesh_terms: D000907:Antibodies, Bacterial / Q000097:blood*; D001172:Arthritis, Rheumatoid / Q000276:immunology* / Q000382:microbiology*; D001315:Australia; D001421:Bacteria, Anaerobic / Q000276:immunology*; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood*; D008297:Male; D008875:Middle Aged; D010518:Periodontitis / Q000276:immunology* / Q000382:microbiology*; D014421:Turkey
chemical_list: D000907:Antibodies, Bacterial; D007074:Immunoglobulin G