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Is there a link between Chlamydia and heart disease?

Published online by Cambridge University Press:  06 July 2010

Lee A. Campbell
Affiliation:
Department of Pathobiology, University of Washington, Seattle, WA 98195, USA
Cho-chou Kuo
Affiliation:
Department of Pathobiology, University of Washington, Seattle, WA 98195, USA
N. A. Logan
Affiliation:
Glasgow Caledonian University
H. M. Lappin-Scott
Affiliation:
University of Exeter
P. C. F Oyston
Affiliation:
Defence Science and Technology Laboratory, Porton Down
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Summary

CHLAMYDIAE

Chlamydiae are Gram-negative bacteria that are obligately intracellular parasites (Moulder et al., 1984). Chlamydia trachomatis and Chlamydia pneumoniae are human pathogens. C. trachomatis is a leading cause of preventable blindness in developing nations and sexually transmitted disease in the Western world (Moulder et al., 1984). C. pneumoniae is an aetiological agent of acute respiratory diseases (Grayston et al., 1998) and causes approximately 10% of pneumonia cases and 5% of bronchitis and sinusitis cases in adults (Grayston et al., 1993). Chlamydia psittaci is an avian pathogen. Humans can be infected with C. psittaci, through direct contact with an infected bird or by inhalation of dust contaminated with excreta of infected birds. This disease, known as psittacosis, is a severe pneumonia with systemic symptoms (Moulder et al., 1984; Everett et al., 1999). Other chlamydial species infect animals (Fukushi & Hirai, 1992; Everett et al., 1999). Although rare, humans may be infected through contact with lower mammals.

Chlamydial infection often becomes chronic and induces chronic inflammatory responses leading to tissue destruction, fibrosis and scarring and, thus, has been termed a disease of immunopathology (Grayston et al., 1985). For example, repeated/chronic ocular infection with C. trachomatis can result in blindness and genital tract infection can result in obstruction of the fallopian tube and infertility. Considerable recent attention has been focused on the association of C. pneumoniae with atherosclerosis, a disease of chronic inflammation and the leading cause of morbidity and mortality in the Western world.

Type
Chapter
Information
Prokaryotic Diversity
Mechanisms and Significance
, pp. 145 - 162
Publisher: Cambridge University Press
Print publication year: 2006

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