title: Helicobacter pylori infection in anterior uveitis.
abstract: BACKGROUND
  Despite intensive research, the etiology of acute anterior uveitis (AAU) remains poorly defined. Infection with gram-negative bacteria such as Yersinia, Salmonella, Shigella, and Chlamydia have already been suggested as a possible trigger event for AAU. Helicobacter pylori is also a gram-negative bacterium, shares the lipopolysaccharides, but did not attract the attention of many ophthalmologists until recently. Having in mind the relatively high incidence of H. pylori infection in the population, we propose that H. pylori may also be a trigger factor for AAU.
  
  
  METHODS
  The presence of anti-H. pylori antibodies in matching serum and aqueous humor samples of 15 idiopathic AAU patients was determined using a commercial Western blot assay. Control serum and aqueous humor were obtained from five patients undergoing cataract surgery.
  
  
  RESULTS
  Six out of 15 AAU patients (40%) were serum-positive for H. pylori, and half of these (n = 3) also had anti-H. pylori antibodies in the aqueous humor. All five aqueous humor and sera controls tested negative for H. pylori infection.
  
  
  CONCLUSIONS
  These are the first results demonstrating anti-H. pylori antibodies in the aqueous humor of AAU patients. Further studies are needed to demonstrate whether this antibody is indeed locally produced. Our data may provide first evidence for a causative link between H. pylori infection and AAU.
authors.affiliation: Dept. of Ophthalmology, Charité, Humboldt University, Berlin, Germany.
authors.forename: L
authors.initials: L
authors.lastname: Otasevic
authors.forename: A
authors.initials: A
authors.lastname: Walduck
authors.forename: T F
authors.initials: TF
authors.lastname: Meyer
authors.forename: T
authors.initials: T
authors.lastname: Aebischer
authors.forename: C
authors.initials: C
authors.lastname: Hartmann
authors.forename: N
authors.initials: N
authors.lastname: Orlic
authors.forename: U
authors.initials: U
authors.lastname: Pleyer
mesh_terms: D000328:Adult; D000368:Aged; D000907:Antibodies, Bacterial / Q000032:analysis / Q000097:blood; D000942:Antigens, Bacterial / Q000276:immunology; D001082:Aqueous Humor / Q000276:immunology / Q000382:microbiology; D001426:Bacterial Proteins / Q000276:immunology; D005260:Female; D016481:Helicobacter Infections / Q000175:diagnosis*; D016480:Helicobacter pylori / Q000472:pathogenicity*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014606:Uveitis, Anterior / Q000276:immunology / Q000382:microbiology*
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D001426:Bacterial Proteins; C074689:VacA protein, Helicobacter pylori; C080866:cagA protein, Helicobacter pylori