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[Chronic Chlamydia pneumoniae infection in patients with coronary disease. Relation with increased fibrinogen values]
Consuelo Fernández-Miranda1, Manuel Paz, José Luis Aranda
1Servicio de Medicina Interna, Unidad de Lípidos y Aterosclerosis, Hospital Universitario 12 de Octubre, Madrid, Spain. cfmiranda@inicia.es
Insights
Chronic Chlamydia pneumoniae infection is highly prevalent in Spanish coronary disease patients. This infection is linked to higher fibrinogen levels, a key cardiovascular risk factor.
Area of Science:
- Infectious Disease Epidemiology
- Cardiovascular Medicine
- Immunology
Context:
- Atherosclerosis development is potentially linked to Chlamydia pneumoniae infections.
- Understanding chronic infection prevalence in coronary disease patients is crucial for risk assessment.
Purpose:
- To determine the prevalence of chronic Chlamydia pneumoniae infection in Spanish patients with coronary disease.
- To investigate the association between chronic C. pneumoniae infection and inflammatory markers and cardiovascular risk factors.
Summary:
- The study found a high seropositivity rate for Chlamydia pneumoniae (72.8%) in Spanish coronary disease patients.
- While general cardiovascular risk factors were similar, seropositive patients exhibited higher rates of hyperfibrinogenemia.
- Multivariate analysis revealed a significant association between C. pneumoniae seropositivity and elevated fibrinogen levels (OR=2.42).
Impact:
- Highlights the significant prevalence of chronic Chlamydia pneumoniae infection in patients with coronary artery disease.
- Identifies hyperfibrinogenemia as a key inflammatory marker associated with chronic C. pneumoniae infection in this population.
- Provides evidence supporting the role of C. pneumoniae in cardiovascular disease pathogenesis, particularly concerning fibrinogen levels.
Background:
A number of studies have suggested that infection with Chlamydia pneumoniae can play a role in development of atherosclerosis. The goal of this study was to know the prevalence of chronic C. pneumoniae infection, evaluated with IgG antibodies seropositivity, in Spanish patients with coronary disease and its association with inflammatory markers and cardiovascular risk factors.
Patients And Method:
In 176 patients with coronary disease IgG and IgM antibodies to C. pneumoniae were determined by enzyme immunoassay. In addition, fibrinogen and C-reactive protein values were measured as inflammatory markers. Controls were 55 healthy subjects whose age was not different from patients. Seropositivity for C. pneumoniae was considered when indices of IgG and/or IgM antibodies were higher than mean plus two standard deviations of control values. Three patients with seropositivity for IgM were excluded.
Results:
In 126 patients and 2 controls a seropositivity against C. pneumoniae was proved (72.8% vs 4.2%; p < 0.001). Cardiovascular risk factors were not different in seropositive and seronegative groups of patients. Prevalence of hyperfibrinogenemia was higher in the former group (38.8% vs 19.1%; p = 0.01). The number of the patients with increased values of C-reactive protein was similar in both groups, although these values could be modified by treatment with statins. In multivariate analysis an association between seropositivity for C. pneumoniae and hyperfibrinogenemia was found (odds ratio [OR] = 2.42; 95% confidence interval, 1.07-5.48; p = 0.03) after adjusting for age, gender, smoking, hypertension, hypercholesterolemia and diabetes.
Conclusions:
Chronic infection with C. pneumoniae in patients with coronary disease is very prevalent, and it is associated with increased fibrinogen values.
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