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  • American Society for Microbiology  (5)
  • 1
    Online-Ressource
    Online-Ressource
    Survey of Culture, GoldenGate Assay, Universal Biosensor Assay, and 16S rRNA Gene Sequencing as Alternative Methods of Bacterial Pathogen Detection
    American Society for Microbiology ; 2013
    In:  Journal of Clinical Microbiology Vol. 51, No. 10 ( 2013-10), p. 3263-3269
    Details
    In: Journal of Clinical Microbiology, American Society for Microbiology, Vol. 51, No. 10 ( 2013-10), p. 3263-3269
    Kurzfassung: Cultivation-based assays combined with PCR or enzyme-linked immunosorbent assay (ELISA)-based methods for finding virulence factors are standard methods for detecting bacterial pathogens in stools; however, with emerging molecular technologies, new methods have become available. The aim of this study was to compare four distinct detection technologies for the identification of pathogens in stools from children under 5 years of age in The Gambia, Mali, Kenya, and Bangladesh. The children were identified, using currently accepted clinical protocols, as either controls or cases with moderate to severe diarrhea. A total of 3,610 stool samples were tested by established clinical culture techniques: 3,179 DNA samples by the Universal Biosensor assay (Ibis Biosciences, Inc.), 1,466 DNA samples by the GoldenGate assay (Illumina), and 1,006 DNA samples by sequencing of 16S rRNA genes. Each method detected different proportions of samples testing positive for each of seven enteric pathogens, enteroaggregative Escherichia coli (EAEC), enterotoxigenic E. coli (ETEC), enteropathogenic E. coli (EPEC), Shigella spp., Campylobacter jejuni , Salmonella enterica , and Aeromonas spp. The comparisons among detection methods included the frequency of positive stool samples and kappa values for making pairwise comparisons. Overall, the standard culture methods detected Shigella spp., EPEC, ETEC, and EAEC in smaller proportions of the samples than either of the methods based on detection of the virulence genes from DNA in whole stools. The GoldenGate method revealed the greatest agreement with the other methods. The agreement among methods was higher in cases than in controls. The new molecular technologies have a high potential for highly sensitive identification of bacterial diarrheal pathogens.
    Materialart: Online-Ressource
    ISSN: 0095-1137 , 1098-660X
    URL: Article
    DOI: 10.1128/JCM.01342-13
    RVK:
    XA 10000
    Sprache: Englisch
    Verlag: American Society for Microbiology
    Publikationsdatum: 2013
    ZDB Id: 1498353-9
    SSG: 12
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 2
    Online-Ressource
    Online-Ressource
    Comparison of Direct and Concentrated Acid-Fast Smears To Identify Specimens Culture Positive for Mycobacterium spp
    American Society for Microbiology ; 1999
    In:  Journal of Clinical Microbiology Vol. 37, No. 11 ( 1999-11), p. 3564-3568
    Details
    In: Journal of Clinical Microbiology, American Society for Microbiology, Vol. 37, No. 11 ( 1999-11), p. 3564-3568
    Kurzfassung: Microscopic examination of respiratory specimens for acid-fast bacilli (AFB) plays a key role in the initial diagnosis of tuberculosis, monitoring of treatment, and determination of eligibility for release from isolation. The objective of this study was to compare the sensitivity obtained with smears for detection of AFB (AFB smears) made directly from respiratory specimens (direct AFB smears) to that obtained with parallel smears made from concentrates of the specimens (concentrated AFB smears). A total of 2,693 specimens were evaluated; 1,806 were from the University of California Irvine Medical Center Medical Microbiology Laboratory (UCIMC), which serves a tertiary-care hospital with outpatient clinics, and 887 were from the Microbial Disease Laboratory at the California Department of Public Health (MDL), which receives specimens from outpatient facilities and clinics on Pacific islands. Of the 353 AFB culture-positive specimens at UCIMC, there was a statistically significant difference in the sensitivity of the direct AFB smear (34%) and that of the smear made from the concentrated specimen (58%) ( P 〈 0.05). This was also true for the 208 specimens positive for Mycobacterium tuberculosis , for which the sensitivity of the direct smear was 42% (87 of 208) and that for the smear made from the concentrated specimen was 74% (154 of 208). At MDL, where all but 1 of the 45 culture-positive specimens grew M. tuberculosis , the sensitivity of the smear made from the concentrated specimen was 93% (42 of 45) and was not significantly higher than the sensitivity of the direct smear, which was 82% (37 of 45). By combining the results from both laboratories, 42 patients from whom at least three specimens were received were culture positive for M. tuberculosis . The cumulative results for the initial three specimens from these patients showed that the direct smear detected M. tuberculosis in 81% of these patients, whereas the smear made from the concentrate detected M. tuberculosis in 91% of these patients. In summary, when all culture-positive specimens are considered, the sensitivity of the direct smear compared to that of a smear made from the concentrated specimen was significantly different overall in the two different laboratory settings. However, this difference was reduced only if the cumulative results for the initial three specimens received from patients who were culture positive for M. tuberculosis were evaluated.
    Materialart: Online-Ressource
    ISSN: 0095-1137 , 1098-660X
    URL: Article
    DOI: 10.1128/JCM.37.11.3564-3568.1999
    RVK:
    XA 10000
    Sprache: Englisch
    Verlag: American Society for Microbiology
    Publikationsdatum: 1999
    ZDB Id: 1498353-9
    SSG: 12
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Online-Ressource
  • 3
    Online-Ressource
    Online-Ressource
    Methamphetamine Enhances Cryptococcus neoformans Pulmonary Infection and Dissemination to the Brain
    American Society for Microbiology ; 2013
    In:  mBio Vol. 4, No. 4 ( 2013-08-30)
    Details
    In: mBio, American Society for Microbiology, Vol. 4, No. 4 ( 2013-08-30)
    Kurzfassung: Methamphetamine (METH) is a major health threat to our society, as it adversely changes people’s behavior, as well as increases the risk for the acquisition of diverse infectious diseases, particularly those that enter through the respiratory tract or skin. This report investigates the effects of METH use on pulmonary infection by the AIDS-related fungus Cryptococcus neoformans . This drug of abuse stimulates colonization and biofilm formation in the lungs, followed by dissemination of the fungus to the central nervous system. Notably, C. neoformans modifies its capsular polysaccharide after METH exposure, highlighting the fungus’s ability to adapt to environmental stimuli, a possible explanation for its pathogenesis. The findings may translate into new knowledge and development of therapeutic and public health strategies to deal with the devastating complications of METH abuse.
    Materialart: Online-Ressource
    ISSN: 2161-2129 , 2150-7511
    URL: Article
    DOI: 10.1128/mBio.00400-13
    Sprache: Englisch
    Verlag: American Society for Microbiology
    Publikationsdatum: 2013
    ZDB Id: 2557172-2
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 4
    Online-Ressource
    Online-Ressource
    Functional Antagonism of Chemokine Receptor CCR1 Reduces Mortality in Acute Pneumovirus Infection In Vivo
    American Society for Microbiology ; 2004
    In:  Journal of Virology Vol. 78, No. 15 ( 2004-08), p. 7984-7989
    Details
    In: Journal of Virology, American Society for Microbiology, Vol. 78, No. 15 ( 2004-08), p. 7984-7989
    Kurzfassung: We present an antiviral-immunomodulatory therapeutic strategy involving the chemokine receptor antagonist Met-RANTES, which yields significant survival in the setting of an otherwise fatal respiratory virus infection. In previous work, we demonstrated that infection with the natural rodent pathogen pneumonia virus of mice involves robust virus replication accompanied by cellular inflammation modulated by the CC chemokine macrophage inflammatory protein 1α (MIP-1α). We found that the antiviral agent ribavirin limited virus replication in vivo but had no impact on morbidity and mortality associated with this disease in the absence of immunomodulatory control. We show here that ribavirin reduces mortality, from 100% to 10 and 30%, respectively, in gene-deleted CCR1 −/− mice and in wild-type mice treated with the small-molecule chemokine receptor antagonist, Met-RANTES. As MIP-1α-mediated inflammation is a common response to several distantly related respiratory virus pathogens, specific antiviral therapy in conjunction with blockade of the MIP-1α/CCR1 inflammatory cascade may ultimately prove to be a useful, generalized approach to severe respiratory virus infection and its pathological sequelae in human subjects.
    Materialart: Online-Ressource
    ISSN: 0022-538X , 1098-5514
    URL: Article
    DOI: 10.1128/JVI.78.15.7984-7989.2004
    Sprache: Englisch
    Verlag: American Society for Microbiology
    Publikationsdatum: 2004
    ZDB Id: 1495529-5
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 5
    Online-Ressource
    Online-Ressource
    Identification of Occult Fusobacterium nucleatum Central Nervous System Infection by Use of PCR-Electrospray Ionization Mass Spectrometry
    American Society for Microbiology ; 2014
    In:  Journal of Clinical Microbiology Vol. 52, No. 9 ( 2014-09), p. 3462-3464
    Details
    In: Journal of Clinical Microbiology, American Society for Microbiology, Vol. 52, No. 9 ( 2014-09), p. 3462-3464
    Kurzfassung: Anaerobic bacteria are often difficult to detect, especially after the initiation of antibiotics. We describe the application of PCR-electrospray ionization mass spectrometry (PCR/ESI-MS) using a sample of cerebrospinal fluid to identify an anaerobic Gram-negative bacillus, Fusobacterium nucleatum , in a patient with “culture-negative” meningitis and cerebral abscesses.
    Materialart: Online-Ressource
    ISSN: 0095-1137 , 1098-660X
    URL: Article
    DOI: 10.1128/JCM.01082-14
    RVK:
    XA 10000
    Sprache: Englisch
    Verlag: American Society for Microbiology
    Publikationsdatum: 2014
    ZDB Id: 1498353-9
    SSG: 12
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Online-Ressource
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