ABX data
Posted: Sat Apr 08, 2006 6:25 am
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Antibiotics deemed effective against CPn can in fact induce persistenceChlamydia pneumoniae-specific DNA was found in 10 of 11 GO (gingivitis overgrowth)tissue samples pre-treatment. Azithromycin therapy effectively reduced GO and C. pneumoniae IgM titres. In residual GO, C. pneumoniae-specific DNA remained detectable after 1 year in all GO tissue samples despite azithromycin treatment. The C.pneumoniae IgM titres correlated with GO scores. CONCLUSION: Chlamydia pneumoniae infection is highly prevalent in CsA-induced GO. The infection can persist over a long period in residual GO despite short-term azithromycin therapy. The results indicate that CsA immunosuppression enhances C. pneumoniae infection rates in non-cardiovascular tissue.
A short course of abx such as is used for a bladder infection for example would be subinhibitory.First-choice antibiotics at subinhibitory concentrations induce persistence of Chlamydia pneumoniae.
Gieffers J, Rupp J, Gebert A, Solbach W, Klinger M.
Institute of Medical Microbiology and Hygiene, University of Lubeck, 23538 Luebeck, Germany. Jens.Gieffer@hygiene.ukl.mu-luebeck.de
Persistent growth forms of Chlamydia pneumoniae have been associated with chronic infections in vivo. We investigated the effects of first-line therapeutics on the induction of persistence by monitoring recoverable organisms, gene expression of membrane proteins, and morphology. We found that all of the antibiotics tested have distinct and subinhibitory concentrations at which they induce persistence.
PMID: 15047553 [PubMed - indexed for MEDLINE
and thisChronic, persistent infection with Chlamydia pneumoniae has been implicated in the pathogenesis of several chronic diseases initially not thought to be infectious, including asthma, arthritis and atherosclerosis.
Please note that arthritis is listed here as a disease not thought to be infectious but which is now being increasingly found to be possibly caused by CPn. RA is considered by most to be "autoimmune" just like MS. The woman who wrote this paper is a lead MD researcher for the US Centers for Disease Control. Steroids reduce symptoms of RA. So do NSAIDS. So do immunosuppressive therapies like Enbrel, all becasue it knocks back the immune system and thus symptoms. Hmmm sound familiar?Persistence of the organism does not appear to be due to the development of antibiotic resistance. However, one cannot extrapolate from this experience to the treatment of chronic C. pneumoniae infection, especially cardiovascular disease. As there are no reliable serologic markers for chronic or persistent C. pneumoniae infection, it cannot be determined who is infected and who is not, which means that it cannot be assumed that any effect seen is due to successful treatment or eradication of C. pneumoniae.
It's interesting a hormone usually low in people with MS offers some protection against bacterial infections and the LPS toxicity you referenced (at least in mice.) And, as you noted, it has been proposed as one model to study MS.the 88% mortality rate seen in LPS challenge was reduced to 17% and 8.5%, by treatment with DHEA and AED, respectively. The protective influences of both steroids were shown not to be directly antibacterial, but primarily an indirect antitoxin reaction.....The data suggest that both DHEA and AED may have a role in the neuro-endocrine regulation of antibacterial immune resistance.
Dehydroepiandrosterone (DHEA), an adrenal-derived steroid, has been implicated in protection against neurotoxicity and protection of animals from viral-induced encephalitis, resulting in an increased survival rate of the animals.