| high prevalence of antibodies to chlamydia pneumoniae; determinants of igg and iga seropositivity among jerusalem residents. | the prevalence of antibodies to chlamydia pneumoniae was examined in a stratified random sample of 581 jerusalem adult residents between august 1987 and march 1989. igg and iga titres were measured by microimmunofluorescence, and associations with smoking and socio-demographic variables were assessed. igg antibodies were found in 84.5% (95% confidence interval (ci): 80.4-87.9) of men and 68.7% (95% ci: 61.6-75.0) of women (p < 0.0001 for sex difference), indicating a very high rate of exposure i ... | 1995 | 7781734 |