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Chlamydia infections. --- Chlamydia infections --- Diagnosis.
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Chlamydia Infections. --- Chlamydia. --- Trachoma.
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Chlamydia infections continue to pose a serious socioeconomic burden globally. Despite advances in diagnostic tests in recent decades, chlamydial infections still cannot be controlled, neither in developed countries nor in developing countries. Chlamydial infections date back to the beginning of recorded human history. Trachoma caused by Chlamydia trachomatis, which progresses to blindness, is mentioned in ancient Chinese inscriptions and Egyptian scrolls. Today, we must better apply our knowledge against this clever and evolving obligate intracellular parasitic microorganism. Chlamydia - Secret Enemy from Past to Present examines chlamydial infections using a comprehensive multidisciplinary approach. It discusses the microbiology, clinical presentation, and current approaches in the diagnosis and treatment management of chlamydial infection from the viewpoint of different clinics as well as includes relevant and recent literature.
Infectious & contagious diseases. --- Chlamydia --- Chlamydia infections. --- Chlamydia infections --- Infections. --- History.
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Rickettsial diseases --- Chlamydia infections --- Diagnostic virology
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The chlamydiae are Gram-negative, obligate intracellular bacteria with a complex developmental cycle comprising a metabolically less-active, infectious stage, the elementary body (EB), and a metabolically more active stage, the reticulate body (RB). They are responsible for many acute and chronic diseases in humans and animals. In order to play a causative role in chronic diseases, chlamydiae would need to persist and to re-activate within infected cells/tissues for extended periods of time. Persistence in vitro is defined as viable but non-cultivable chlamydiae involving morphologically enlarged, aberrant, and nondividing RBs, termed aberrant bodies (AB). In vitro, alterations of the normal developmental cycle of chlamydiae can be induced by the addition of Interferon-? (IFN-?), tumor necrosis factor-a (TNF-a) and penicillin G exposure as well as amino acid or iron deprivation, monocyte infection and co-infection with viruses. In vivo, key questions include whether or not ABs occur in infected patients and animals and whether such ABs can contribute to prolonged, chronic inflammation, fibrosis, and scarring through continuing stimulation of the host immune system known from diseases such as trachoma, pelvic inflammatory disease, reactive arthritis and atherosclerosis. To date, the direct causal role in the pathogenesis of chlamydial infection and persistence in vivo has been questioned since there was no tractable animal model of chlamydial persistence so far. A very recent study was able to establish an experimental animal model of in vivo persistence, when C. muridarum vaginally-infected mice were gavaged with amoxicillin. Amoxicillin treatment induced C. muridarum to enter the persistent state in vivo. Recent in vivo data from patients indicate that viable but non-infectious developmental stages are present in the genital tract of chronically-infected women and that the gastrointestinal tract might be a reservoir for persistent chlamydial infections at other sites.
Chlamydia infections. --- stress response --- chlamydia --- Chronic Disease
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