mycobacterium infections

..We describe a case of chronic pulmonary infection in an immunocompetent patient. Our observation confirms clinical, diagnostic, and treatment difficulties in the management of M. lentiflavum infection...

..abscessus and closely related species. Molecular typing complements sequence-based identification and provides information on prevalent clones with possible relevant clinical aspects...

..Our data clearly indicate that IL-1 is important for the generation of early-phase protective immunity against mycobacterial infection...

..We conclude that this multiplex, real-time PCR assay is a useful diagnostic tool for the rapid and accurate identification of MTC and clinically relevant nontuberculous mycobacteria...

..Interference with TNF death signaling may be a virulence mechanism that allows M. tuberculosis to circumvent innate defenses leading to apoptosis of infected host cells...

..We sought to estimate NTM disease prevalence in Oregon, and describe disease by site, species, and patient demographic characteristics...

..These results suggest that PRA of rpoB DNA is a simple and feasible method not only for the differentiation of culture isolates but also for the rapid detection and identification of pathogenic mycobacteria in primary clinical specimens...

..The results are consistent with a model in which mycobacterial dissemination from the lung is initiated by the migration of infected dendritic cells to the draining lymph nodes...

..The type strain has been deposited in the Collection Institut Pasteur as CIP 108297(T) and in Culture Collection of the University of Goteborg, Goteborg, Sweden, as CCUG 48898(T)...

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..The patient was a 19-month-old boy with involvement of a cervical lymph node. Surgical removal of the lymphadenopathy was both diagnostic and curative...

..Mycobacterium intracellulare is the main pathogen associated with the increase in isolates speciated in Queensland...

..All strains exhibited multidrug resistance. The patients were adults with immunosuppression or predisposing conditions for NTM infection. Diagnosis of true infection was either not pursued or the patients died shortly after isolation...

..At the time of detection, both cases were also infected with M. avium, suggesting an underestimation of infection with M. lentiflavum and co-infection with different Mycobacterium species...

..The drinking water distribution system may, thus, be a source of nontuberculous mycobacteria resistant to multiple drugs...

..chelonae-abscessus group...

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..This Mycobacterium-induced macrophage aggregation in turn is tightly linked to intercellular bacterial dissemination and increased bacterial numbers. Thus, mycobacteria co-opt host granulomas for their virulence...

..Nontuberculous mycobacterial infections, histoplasmosis, and invasive Staphylococcus aureus infection were all reported more frequently than was tuberculosis disease in this context...

..Furthermore, we describe here the analysis of the 16S-23S rRNA internal transcribed spacer sequence of M. lentiflavum...

..Sophisticated techniques, like genetic sequencing or HPLC, by now seem indispensable for differentiating unusual and new mycobacteria from well-established ones...

..In the first, the mycobacterium was responsible for chronic pulmonary disease in an elderly woman; in the second, it gave rise to cervical lymphadenitis in a child; and in the third, it caused a liver abscess in a young AIDS patient...

..Respiratory specimens with nontuberculous mycobacteria (NTM) are increasingly common; however, pulmonary disease prevalence is unknown...

..The isolates were identified as BCG Tokyo strains by the deletion of the region of difference 1 (RD1) and characterization of RD8 and RD14 using the multiplex polymerase chain reaction...

..This novel clinical syndrome links susceptibility to mycobacterial, viral, and fungal infections with malignancy and can be transmitted in an autosomal dominant pattern...

..A study was undertaken of the "isolation prevalence" of pulmonary NTM in Ontario, Canada between 1997 and 2003 and the frequency of pulmonary NTM "disease"...

..It impairs the nuclear accumulation of GAF but not of ISGF3 in heterozygous cells stimulated by IFNs. Thus, the antimycobacterial, but not the antiviral, effects of human IFNs are principally mediated by GAF...

..Therefore, IL-18 is important for the generation of protective immunity to mycobacteria, and its main function is the induction of IFN-gamma expression...

..Viral multiplication was not inhibited by recombinant IFN-alpha/beta in cell lines from the two individuals. Inherited impairment of the STAT1-dependent response to human IFN-alpha/beta thus results in susceptibility to viral disease...

..Therefore, TNF orchestrates early induction of chemokines and initial leukocyte recruitment, but has an additional role in the aggregation of leukocytes into functional granulomas capable of controlling virulent mycobacterial infection...

..Especially fish handlers and aquarium hobbyists are infected and the disease is mostly confined to the superficial, cooler body tissues, most often the extremities. Dissemination is apparently rare but has been reported...

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..In conclusion, mycobacteriosis remains the leading cause of FUO in southern Taiwan and it is important to screen for this treatable disease in all cases of FUO...

..simiae has been recovered from hospital tap water and its first presentation in municipal water. This study raises issues about the need and feasibility of eliminating or avoiding exposure to M. simiae from tap water...

..Mycobacterium haemophilum, a nontuberculous mycobacterium (NTM) that was first described in 1978, is a pathogen that can cause an array of symptoms in immunocompromised patients, predominantly cutaneous...

..These findings provide molecular evidence suggesting that the BCG-induced gene networks may represent global transcriptomes and proteomes underlying the development of T cell responses and, ultimately, immunity to mycobacteria...

..This finding is pertinent for the regulation of pulmonary and systemic immune responses and possibly for the dissemination of mycobacterial infection by DCs...

..9% to 7.5%; and Mycobacterium haemophilum 1.2% to 0%). These findings disclose major temporal changes in the distribution of mycobacterial species in respiratory specimens with an impressive emergence and takeover of M. simiae...

..We present here, to our knowledge, the first report of a fatal pulmonary infection caused by M. celatum in a 73-year-old immunocompetent female patient. The mycobacterium was identified by a 16S rRNA sequence analysis...

..abscessus. CONCLUSION: These results suggest that a substantial proportion of patients at a tertiary care medical centre in South Korea with AFB smear-positive sputum specimens may have NTM lung disease rather than PTB...

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..We also discuss the problem of IRD associated with mycobacterial diseases in developing countries where tuberculosis prevalence is high and access to HAART is currently expanding...

..The SMIS, combined with knowledge of RPHRs, RRTs, and phenotypic characteristics, offers a rapid, reasonably accurate, cost-effective alternative to more traditional methods of mycobacterial species identification...

..haemophilum was the second most commonly recognized pathogen. Real-time PCR results were superior to culture because only 9 (56%) of the 16 diagnosed M. haemophilum infections were positive by culture...

..The organisms are most susceptible to ciprofloxacin, clarithromycin, rifabutin, and rifampin. Timely diagnosis and therapy require communication between clinician and the laboratory...

..In others, improvement in critical points is still necessary...

..We assessed the diagnostic accuracy of IGRAs for TB in children in an area with a low incidence of TB...

..Furthermore, studies should focus on the actual sites of the active replication of RGM; their presence may not indicate their natural habitat...

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..Some discrepancies were seen between the identification methods and further investigations must be done to better characterize NTM isolates using other phenotypic and genotypic methods...

..Patterns available on the Internet can be introduced into this database, which will make possible the comparison of genotypes from isolates from different parts of the world...

..Jenkin, P. D. Johnson, and J. K. Davies, J. Bacteriol. 182:6322-6330, 2000) that M. ulcerans represents a relatively recent phylogenetic derivative of M. marinum resulting from the systematic acquisition of foreign DNA fragments...

..Collectively, these data demonstrate that Mab actively internalizes into and robustly activates innate immune responses in macrophages through a physical and functional interaction between TLR2 and dectin-1...

..In regions with a low incidence of tuberculosis, lymphadenitis thought to be due to nontuberculous mycobacteria should be managed as such, regardless of Mantoux results, thereby avoiding antituberculosis treatment...

..chelonae/M. abscessus and identified M. massiliense from isolates from two patients with invasive disease representing the first reported cases in the United States...

..Mycobacterial blood culture can play an increasing role in the diagnosis of disseminated tuberculosis when localized disease is not found...

..Therefore, the ability of pathogenic mycobacteria to limit MAPK activity is likely an important virulence mechanism and may be a potential therapeutic target...

..salmoniphilum' as Mycobacterium salmoniphilum (ex Ross 1960) sp. nov., nom. rev., with the type strain SCT (=ATCC 13578T =DSM 43276T)...

..The data suggest that whole-cell MALDI-TOF MS has potential as a rapid and reproducible method for the identification and characterization of Mycobacterium species...

..Raman spectroscopy provides a novel answer to the need for rapid species identification of cultured mycobacteria in a clinical diagnostic setting...

..Therefore, the RDBH assay can be considered a rapid, simple, and reliable method for routine identification of frequently occurring and clinically relevant mycobacteria...

..abscessus...

..One of our strains was responsible for pulmonary disease in a middle-aged non-HIV patient; thus, confirming the potential pathogenicity of this species previously reported only in an HIV-positive patient...

..These data, in addition to their position in the phylogenetic tree, strongly support the status of novel species at least for Mycobacterium sp. G1368...

..PRA was found useful in the identification of mycobacteria and simple to implement as a quick method in the laboratory...

..The mPCR developed in this study allowed rapid detection and differentiation of primary cultures as MTC or NTM, thus helping in timely institution of specific therapy...

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..To avoid methodological diversity, larger multicentre trials with a central laboratory for sample testing should be designed...

..In contrast, IS901-negative isolates (M. a. hominissuis) displayed distinct profiles in both molecular systems...

..tuberculosis and its effective differentiation from NTM, which may be adapted for use at Level II laboratories, especially in developing countries...

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..As these studies uncover new facets of the bacteria-host interactions in tuberculosis they raise even more questions for future investigation...

..S. hospital. The investigation highlights important differences in the available typing methods for mycobacteria and demonstrates the genetic diversity of these organisms even within narrow confines of time and space...

..Patients with end-stage renal disease are at high risk of mycobacterial infection...

..Correlation of MPT64 antigen with expression of macrophage deactivating cytokines and reduced apoptosis suggests its role in pathogenesis and bacillary persistence...

..We show that the results of positive cultures of these mycobacteria are effectively lost because they are not available in a timely fashion, and even when available, the results are overlooked...

..In addition, the definition of key molecules that are important for intracellular survival opens the possibility to develop new drugs to combat mycobacterial diseases...

..bovis and M. tuberculosis, when it is important to distinguish between zoonotic sources (i.e., cattle and unpasteurized dairy products) and human sources of tuberculosis disease...

..tuberculosis H37Rv. Considering that "M. canettii" may also exist as a stable rough morphotype, we suggest that the true number of "M. canettii" isolates may be underestimated in clinical microbiology laboratories...

..It has proven beneficial in the management of Mycobacterium collections and may be applied for practical clinical and epidemiological use...

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..Although not statistically significant, the trend is consistent with the hypothesis that prior exposure to environmental mycobacteria interferes with immune responses to BCG vaccination...

..M. bovis subsp. bovis, M. bovis subsp. caprae, M. bovis BCG, M. africanum subtype I, and M. microti were unequivocally identified. M. tuberculosis, M. canetti, and M. africanum subtype II showed a unique hybridization pattern...

..The multiplex-PCR method may offer expeditious identification of MTC and M. avium, which may minimize risks for active transmission of these organisms and provide useful treatment information...

..This study confirmed the adequate preservation of genetic material in mummified tissues and the existence of mycobacteria, including M. tuberculosis, in historic populations in South America...

..The MGIT recovered 243 from 266 mycobacterial isolates. The PCR-based assay correctly identified all (234) Mycobacterium tuberculosis isolates, while 35 nontuberculous mycobacterial isolates were identified by PRA...

..intracellulare as found by the conventional tests. The assay allows rapid discrimination of the eight most clinically relevant mycobacteria in microscopy positive clinical specimens and isolates within 6 h in the same procedural run...

..abscessus and M. kansasii, which are not targeted by Amplicor. FCE-RF-SSCP of sputum obtained from a patient with mixed M. avium and M. intracellulare infection gave SSCP patterns corresponding to these two species...

..In conclusion, we believe this test may be useful for the rapid detection of mycobacteria in clinical samples and may be a valuable tool when used together with conventional methods and the clinical data available...

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..In addition, this approach was incorporated into a multiplex PCR that included primers specific for IS6110 and the 65-kDa antigen gene in order to differentiate members of the M. tuberculosis complex from atypical mycobacteria...

..The LiPA assay correctly identified 89.4% of the 66 isolates studied, and the GenoType assay identified 95.1% of 81 isolates. The GenoType assay had a wider selection of species and less stringent temperature requirements...

..tuberculosis complex and M. bovis BCG. The prepared library comprising 28 reference elution profiles of mycolic acids from known mycobacteria species can be applied in diagnostic procedure of tuberculosis and mycobacteriosis...

..That 2DBGD can be used to identify differences resulting from either insertional mutagenesis using a gentamicin-resistance gene or from a frameshift mutation is demonstrated...

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..smegmatis and M. tuberculosis all in relation to biology and biosynthesis. ..

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..3. To elucidate the role of the TLRs, MAPK and NFkB signaling pathways, and ManLAM in controlling the growth of M. tuberculosis in mouse and human macrophages and to correlate effects on growth with NO* and TNFa expression. ..

..These data will extend ongoing, NIH-funded programs for identification of new drug targets, vaccines and adjuvants. ..

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..These findings, which will assess in an independent and complementary fashion the role of mycobacteria in sarcoidosis immunopathogenesis, may have an impact on future therapeutic modalities for sarcoidosis. ..

..tuberculosis. We propose determining how the bacterium's metabolism is realigned to access these carbon sources. ..

..These new cell types may improve the protective effect of vaccines and thereby reduce the incidence of tuberculosis in the world. This will have a significant impact in worldwide public health. ..

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..It is anticipated that this final aim will develop into a new grant application that will enable us to test the effectiveness of a range of microbial products for their efficacy as adjuvants. ..

..These experiments are relevant to human health since determining the effect of inflammation on the response to vaccination will allow us to improve vaccination in the elderly. ..

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..PERFORMANCE SITE (S) (organization, city, state) St. Jude Children's Research Hospital, Memphis, TN . ..

..The applicants believe that the studies outlined in this proposal will provide excellent tools for the identification of novel genes associated with mechanisms of pathogenesis of M. avium.m. ..

..Finally, they will test the hypothesis that appropriate chemotherapy can restore the correct immunologic functions/signals, using both established regimens, as well as new compounds recently identified in their laboratory as active. ..

..tuberculosis. The structural studies will directly aid the immunological studies by providing a wealth of LAM related molecules needed to decipher the structural characteristics necessary for recognition by T-cells and macrophages. ..

..We will use the recombinant enzymes to screen drug libraries at GlaxoWellcome. Structural information generated by Dr. Sacchettini will be central to the development of effective inhibitors against these enzymes. ..

..The goal of this research is to understand the interaction of T cell responses controlling different infections. Hopefully, this will lead to better treatments of mycobacterial disease. ..

..The research has broad relevance to the management of Al during severe infections. ..

..New knowledge of how T cells regulate granulomas will lead to more efficient therapeutic manipulations of granulomatous diseases. ..

..New knowledge of how T cells regulate granulomas will lead to more efficient therapeutic manipulations of granulomatous diseases. ..

..tuberculosis through an exposed population. ..

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..A new generation of flow cytometric assays is becoming available and our group of users would like to advance to the next level. ..

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..As part of this exploration, we hope to identify and test new therapeutic strategies. ..

..Our findings will also assist clinicians in predicting which patients with NTM isolated from the respiratory tract will have NTM pulmonary disease. ..