title: The seroepidemiology of the chronic infections in patients with myocardial infarction in North of Iran.
abstract: BACKGROUND
  Recent studies have suggested that chronic infections with Chlamydia pneumoniae (Cpn) and Helicobacter pylori (Hp) may be associated with the risk of Myocardial Infarction (MI).
  
  
  METHODS
  A cross sectional study was conducted on 140 citizens. Seroprevalence was assessed by ELISA tests measuring IgA and IgG antibodies to Cpn and Hp in sera.
  
  
  RESULTS
  Among patients, %11.4 and %90.0 were seropositive for Anti-Cpn IgA and IgG respectively, and also %51.4 and %58.6 were seropositive for Anti-Hp IgA and IgG respectively.
  
  
  CONCLUSIONS
  The present study shows that previous infection to Cpn in patients with MI is important. But there are no significant association between infection with Hp and MI.
authors.affiliation: Department of Laboratory Sciences, Islamic Azad University, Gorgan Branch, Gorgan, Iran.
authors.forename: Hadi
authors.initials: H
authors.lastname: Bazzazi
authors.forename: Ezzat Allah
authors.initials: EA
authors.lastname: Ghaemi
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Ramezani