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  • American Society for Microbiology  (15)
  • 1
    Online Resource
    Online Resource
    Resistance to Plasmodium chabaudi in B10 mice: influence of the H-2 complex and testosterone
    American Society for Microbiology ; 1988
    In:  Infection and Immunity Vol. 56, No. 9 ( 1988-09), p. 2400-2406
    Details
    In: Infection and Immunity, American Society for Microbiology, Vol. 56, No. 9 ( 1988-09), p. 2400-2406
    Abstract: Resistance to Plasmodium chabaudi has been examined in different inbred mouse strains bearing identical H-2 haplotypes on different genetic backgrounds as well as in H-2-congenic mouse strains on B10 background. Resistance is expressed in terms of percent survival after a challenge with 10(6) P. chabaudi-infected erythrocytes. We can show that murine resistance to P. chabaudi is under complex polygenic control involving a non-H-2 gene(s) as well as genes in both I-A and I-E subregions of the H-2 complex. Our data indicate in particular that malaria protective antigens can be presented in context with I-Ab molecules but not in context with I-Ak molecules. Resistance controlled by I-Ab does not become apparent when I-Ek molecules are coincidentally expressed. Moreover, testosterone abrogates I-Ab-controlled resistance to P. chabaudi.
    Type of Medium: Online Resource
    ISSN: 0019-9567 , 1098-5522
    URL: Article
    DOI: 10.1128/iai.56.9.2400-2406.1988
    RVK:
    XA 10000
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 1988
    detail.hit.zdb_id: 1483247-1
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  • 2
    Online Resource
    Online Resource
    Role of Bacterial Communities in the Natural Suppression of Rhizoctonia solani Bare Patch Disease of Wheat (Triticum aestivum L.)
    American Society for Microbiology ; 2013
    In:  Applied and Environmental Microbiology Vol. 79, No. 23 ( 2013-12), p. 7428-7438
    Details
    In: Applied and Environmental Microbiology, American Society for Microbiology, Vol. 79, No. 23 ( 2013-12), p. 7428-7438
    Abstract: Rhizoctonia bare patch and root rot disease of wheat, caused by Rhizoctonia solani AG-8, develops as distinct patches of stunted plants and limits the yield of direct-seeded (no-till) wheat in the Pacific Northwest of the United States. At the site of a long-term cropping systems study near Ritzville, WA, a decline in Rhizoctonia patch disease was observed over an 11-year period. Bacterial communities from bulk and rhizosphere soil of plants from inside the patches, outside the patches, and recovered patches were analyzed by using pyrosequencing with primers designed for 16S rRNA. Taxa in the class Acidobacteria and the genus Gemmatimonas were found at higher frequencies in the rhizosphere of healthy plants outside the patches than in that of diseased plants from inside the patches. Dyella and Acidobacteria subgroup Gp7 were found at higher frequencies in recovered patches. Chitinophaga , Pedobacter , Oxalobacteriaceae ( Duganella and Massilia ), and Chyseobacterium were found at higher frequencies in the rhizosphere of diseased plants from inside the patches. For selected taxa, trends were validated by quantitative PCR (qPCR), and observed shifts of frequencies in the rhizosphere over time were duplicated in cycling experiments in the greenhouse that involved successive plantings of wheat in Rhizoctonia -inoculated soil. Chryseobacterium soldanellicola was isolated from the rhizosphere inside the patches and exhibited significant antagonism against R. solani AG-8 in vitro and in greenhouse tests. In conclusion, we identified novel bacterial taxa that respond to conditions affecting bare patch disease symptoms and that may be involved in suppression of Rhizoctonia root rot and bare batch disease.
    Type of Medium: Online Resource
    ISSN: 0099-2240 , 1098-5336
    URL: Article
    DOI: 10.1128/AEM.01610-13
    RVK:
    WA 15000
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 2013
    detail.hit.zdb_id: 223011-2
    detail.hit.zdb_id: 1478346-0
    SSG: 12
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  • 3
    Online Resource
    Online Resource
    New methods to assess bacterial injury in water
    American Society for Microbiology ; 1980
    In:  Applied and Environmental Microbiology Vol. 39, No. 3 ( 1980-03), p. 656-658
    Details
    In: Applied and Environmental Microbiology, American Society for Microbiology, Vol. 39, No. 3 ( 1980-03), p. 656-658
    Abstract: Two methods are described for measurement of bacterial injury in water. Laboratory time preceding cell division measured with slide cultures and spheroplast formation after lysozyme treatment were accurate and rapid measurements of bacterial damage.
    Type of Medium: Online Resource
    ISSN: 0099-2240 , 1098-5336
    URL: Article
    DOI: 10.1128/aem.39.3.656-658.1980
    RVK:
    WA 15000
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 1980
    detail.hit.zdb_id: 223011-2
    detail.hit.zdb_id: 1478346-0
    SSG: 12
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  • 4
    Online Resource
    Online Resource
    Atypical Genetic Locus Associated with Constitutive Production of Enterocin B by Enterococcus faecium BFE 900
    American Society for Microbiology ; 1999
    In:  Applied and Environmental Microbiology Vol. 65, No. 5 ( 1999-05), p. 2170-2178
    Details
    In: Applied and Environmental Microbiology, American Society for Microbiology, Vol. 65, No. 5 ( 1999-05), p. 2170-2178
    Abstract: A purified bacteriocin produced by Enterococcus faecium BFE 900 isolated from black olives was shown by Edman degradation and mass spectrometric analyses to be identical to enterocin B produced by E. faecium T136 from meat (P. Casaus, T. Nilsen, L. M. Cintas, I. F. Nes, P. E. Hernández, and H. Holo, Microbiology 143:2287–2294, 1997). The structural gene was located on a 2.2-kb Hin dIII fragment and a 12.0-kb Eco RI chromosomal fragment. The genetic characteristics and production of EntB by E. faecium BFE 900 differed from that described so far by the presence of a conserved sequence like a regulatory box upstream of the EntB gene, and its production was constitutive and not regulated. The 2.2-kb chromosomal fragment contained the hitherto undetected immunity gene for EntB in an atypical orientation that is the reverse of that of the structural gene. Typical transport and other genes associated with bacteriocin production were not detected on the 12.0-kb chromosomal fragment containing the EntB structural gene. This makes the EntB genetic system different from most other bacteriocin systems, where transport and possible regulatory genes are clustered. EntB was subcloned and expressed by the dedicated secretion machinery of Carnobacterium piscicola LV17A. The structural gene was amplified by PCR, fused to the divergicin A signal peptide, and expressed by the general secretory pathway in Enterococcus faecalis ATCC 19433.
    Type of Medium: Online Resource
    ISSN: 0099-2240 , 1098-5336
    URL: Article
    DOI: 10.1128/AEM.65.5.2170-2178.1999
    RVK:
    WA 15000
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 1999
    detail.hit.zdb_id: 223011-2
    detail.hit.zdb_id: 1478346-0
    SSG: 12
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  • 5
    Online Resource
    Online Resource
    Aquatic indicator bacteria in the high alpine zone
    American Society for Microbiology ; 1976
    In:  Applied and Environmental Microbiology Vol. 31, No. 2 ( 1976-02), p. 163-167
    Details
    In: Applied and Environmental Microbiology, American Society for Microbiology, Vol. 31, No. 2 ( 1976-02), p. 163-167
    Abstract: Selected waters from the high alpine zone within Grand Teton National Park, Wyoming, were analyzed for populations of indicator bacteria during the past three summers to determine the influence of various factors on the quality of these waters. In general the water quality was not significantly influenced by the presence or absence of human visitors but rather by the nature of the biological community through which the streams flowed. A minority of the coliforms that were recovered from all of the sites proved to be fecal coliforms. The fecal streptococci isolated were identified as the species that were found primarily in the fecal material of the native rodent and moose populations. It is concluded that management questions that relate to the carrying capacity of alpine areas should be approached with the aid of other biological parameters along with levels of indicator bacteria in the streams.
    Type of Medium: Online Resource
    ISSN: 0099-2240 , 1098-5336
    URL: Article
    DOI: 10.1128/aem.31.2.163-167.1976
    RVK:
    WA 15000
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 1976
    detail.hit.zdb_id: 223011-2
    detail.hit.zdb_id: 1478346-0
    SSG: 12
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  • 6
    Online Resource
    Online Resource
    Antibacterial activity of Lactobacillus sake isolated from meat
    American Society for Microbiology ; 1989
    In:  Applied and Environmental Microbiology Vol. 55, No. 8 ( 1989-08), p. 1901-1906
    Details
    In: Applied and Environmental Microbiology, American Society for Microbiology, Vol. 55, No. 8 ( 1989-08), p. 1901-1906
    Abstract: A total of 221 strains of Lactobacillus isolated from meat and meat products were screened for antagonistic activities under conditions that eliminated the effects of organic acids and hydrogen peroxide. Nineteen strains of Lactobacillus sake, three strains of Lactobacillus plantarum, and one strain of Lactobacillus curvatus were shown to inhibit the growth of some other lactobacilli in an agar spot test; and cell-free supernatants from 6 of the 19 strains of L. sake exhibited inhibitory activity against indicator organisms. Comparison of the antimicrobial spectra of the supernatants suggested that the inhibitory compounds were not identical. One of the six strains, L. sake Lb 706, was chosen for further study. The compound excreted by L. sake Lb 706 was active against various lactic acid bacteria and Listeria monocytogenes. Its proteinaceous nature, narrow inhibitory spectrum, and bactericidal mode of action indicated that this substance is a bacteriocin, which we designated sakacin A. Curing experiments with two bacteriocin-producing strains of L. sake resulted in mutants that lacked both bacteriocin activity and immunity to the bacteriocin. Plasmid profile analysis of L. sake Lb 706 and two bacteriocin-negative variants of this strain indicated that a plasmid of about 18 megadaltons may be involved in the formation of bacteriocin and immunity to this antibacterial compound. In mixed culture, the bacteriocin-sensitive organisms were killed after the bacteriocin-producing strain reached maximal cell density, whereas there was no decrease in cell number in the presence of the bacteriocin-negative variant.
    Type of Medium: Online Resource
    ISSN: 0099-2240 , 1098-5336
    URL: Article
    DOI: 10.1128/aem.55.8.1901-1906.1989
    RVK:
    WA 15000
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 1989
    detail.hit.zdb_id: 223011-2
    detail.hit.zdb_id: 1478346-0
    SSG: 12
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  • 7
    Online Resource
    Online Resource
    Bacterial Survival in Laundered Fabrics
    American Society for Microbiology ; 1975
    In:  Applied Microbiology Vol. 29, No. 3 ( 1975-03), p. 368-373
    Details
    In: Applied Microbiology, American Society for Microbiology, Vol. 29, No. 3 ( 1975-03), p. 368-373
    Abstract: Bacterial survival was determined in linens (i) inoculated with Staphylococcus aureus (ii), taken from hospital isolation patients' beds, and (iii) used by students in their homes. Two different washers using temperatures of 38, 49, 54 and 60 C, respectively, for different times were employed along with a commercial tumbler dryer. Findings, after macerating the linens in a Waring blender and enumerating on nonselective media, indicate that acceptable levels of survivors can be achieved in motel and hotel linens by an 8- to 10-min wash cycle at 54 C followed by adequate drying. However, it is recommended that a wash cycle with 60 C for 10 to 13 min be employed for linens in health care factilities. The microbial significance of various laundering practices is discussed.
    Type of Medium: Online Resource
    ISSN: 0003-6919
    URL: Article
    DOI: 10.1128/am.29.3.368-373.1975
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 1975
    detail.hit.zdb_id: 207801-6
    detail.hit.zdb_id: 1478346-0
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  • 8
    Online Resource
    Online Resource
    Bacterial Survival in Laundered Fabrics
    American Society for Microbiology ; 1975
    In:  Applied Microbiology Vol. 29, No. 3 ( 1975), p. 368-373
    Details
    In: Applied Microbiology, American Society for Microbiology, Vol. 29, No. 3 ( 1975), p. 368-373
    Type of Medium: Online Resource
    ISSN: 0003-6919
    URL: Article
    DOI: 10.1128/AEM.29.3.368-373.1975
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 1975
    detail.hit.zdb_id: 207801-6
    detail.hit.zdb_id: 1478346-0
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  • 9
    Online Resource
    Online Resource
    Frequency and Characteristics of Biological False-Positive Test Results for Syphilis Reported in Florida and New York City, USA, 2013 to 2017
    American Society for Microbiology ; 2019
    In:  Journal of Clinical Microbiology Vol. 57, No. 11 ( 2019-11)
    Details
    In: Journal of Clinical Microbiology, American Society for Microbiology, Vol. 57, No. 11 ( 2019-11)
    Abstract: Discordant syphilis test results, with a reactive nontreponemal test and nonreactive treponemal test are usually considered biological false-positive test results (BFPs), which can be attributed to other conditions. Syphilis surveillance laws mandate laboratory reporting of reactive syphilis tests, which include many BFPs. We describe the frequency of BFPs, titer distributions, and titer increases from reported test results in Florida and New York City (NYC). Reactive nontreponemal tests for individuals with at least one nonreactive treponemal test and no reactive treponemal test were extracted from sexually transmitted disease (STD) surveillance systems in Florida and NYC from 2013 to 2017. Characteristics of individuals with BFPs were analyzed after selecting the observation with the highest titer from each individual. We next considered all results from individuals to characterize persons who had a 4-fold titer increase between successive nontreponemal tests. Among 526,540 reactive nontreponemal tests, there were 57,580 BFPs (11%) from 39,920 individuals. Over 90% ( n  = 52,330) of BFPs were low titer (≤1:4), but 654 (1%) were high-titer BFPs (≥1:32). Very high-titer (≥1:128) BFPs were more common among individuals over 60 years of age (odds ratio [OR], 2.68; 95% confidence interval [CI] , 1.22 to 5.91). A 4-fold increase in titer was observed among 1,863 (14%) individuals with more than one reported BFP. Most BFPs detected by surveillance were low titer, but some were high titer and some had a 4-fold increase in titer. Review of patient histories might identify underlying conditions contributing to these high and rising titers.
    Type of Medium: Online Resource
    ISSN: 0095-1137 , 1098-660X
    URL: Article
    DOI: 10.1128/JCM.00898-19
    RVK:
    XA 10000
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 2019
    detail.hit.zdb_id: 1498353-9
    SSG: 12
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  • 10
    Online Resource
    Online Resource
    Rapid Determination of Bacteriological Water Quality by Using Limulus Lysate
    American Society for Microbiology ; 1978
    In:  Applied and Environmental Microbiology Vol. 35, No. 2 ( 1978-02), p. 376-382
    Details
    In: Applied and Environmental Microbiology, American Society for Microbiology, Vol. 35, No. 2 ( 1978-02), p. 376-382
    Abstract: The Limulus lysate assay was used to measure the endotoxin content in stream water and was found to reflect the degree of bacterial contamination as measured by coliform, enteric, gram-negative, and heterotrophic bacteria. The firm-clot method was found to be a less sensitive and reproducible technique for the detection of endotoxin than was the spectrophotometric modification of the Limulus lysate assay. Bound endotoxin, as determined by the spectrophotometric modification of the Limulus lysate assay, was found to be a better measure of the endotoxin associated with bacterial cells than was total endotoxin.
    Type of Medium: Online Resource
    ISSN: 0099-2240 , 1098-5336
    URL: Article
    DOI: 10.1128/aem.35.2.376-382.1978
    RVK:
    WA 15000
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 1978
    detail.hit.zdb_id: 223011-2
    detail.hit.zdb_id: 1478346-0
    SSG: 12
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