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- Author:
- Garcia-Migura, Lourdes; Liebana, Ernesto; Jensen, Lars Bogø; Barnes, Simon; Pleydell, Eve
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 319-325
- ISSN:
- 0378-1097
- Subject:
- Enterococcus faecium; avoparcin; broiler chickens; clones; disinfection; farms; flocks; genetic variation; livestock and meat industry; longitudinal studies; multiple drug resistance; poultry housing; pulsed-field gel electrophoresis; vancomycin; United Kingdom
- Abstract:
- ... Seven years after the ban of avoparcin, VREF could still be isolated within sectors of the UK broiler industry. The aim of this study was to assess whether there is a carryover of VREF between consecutive flocks of birds, to conduct a preliminary investigation of possible routes of entry of VREF into broiler houses and to follow the dynamics of VREF shed by growing birds. A series of nine visits w ...
- DOI:
- 10.1111/j.1574-6968.2007.00911.x
- PubMed:
- 17825067
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00911.x
- Author:
- Qu, Hong; Xin, Yi; Dong, Xu; Ma, Yufang
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 237-243
- ISSN:
- 0378-1097
- Subject:
- Mycobacterium smegmatis; arabinogalactans; bacteria; biosynthesis; cell biology; drugs; enzymes; genes; homologous recombination; mutants; peptidoglycans
- Abstract:
- ... The rhamnose-GlcNAc disaccharide is a critical linker which connects arabinogalactan to peptidoglycan via a phosphodiester linkage. The biosynthesis of dTDP-rhamnose is catalysed by four enzymes, and the first reaction is catalysed by an rmlA gene encoding d-glucose-1-phosphate thymidylyltransferase (RmlA). We generated a Mycobacterium smegmatis mc²155 mutant lacking the rmlA gene via a homologous ...
- DOI:
- 10.1111/j.1574-6968.2007.00890.x
- PubMed:
- 17784859
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00890.x
- Author:
- Volling, Katrin; Brakhage, Axel A.; Saluz, Hans Peter
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 250-254
- ISSN:
- 0378-1097
- Subject:
- Aspergillus fumigatus; animal pathogenic fungi; apoptosis; aspergillosis; caspase-3; conidia; humans; immune response; innate immunity; macrophages
- Abstract:
- ... The opportunistic human pathogenic fungus Aspergillus fumigatus (Af) causes the majority of cases of invasive aspergillosis. Because Af enters the human body through inhalation of airborne conidia, the interaction of conidia with the innate immune system (alveolar macrophages) plays a key role in the etiology of aspergillosis. Therefore, it is of central interest to investigate response mechanisms ...
- DOI:
- 10.1111/j.1574-6968.2007.00883.x
- PubMed:
- 17714483
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00883.x
- Author:
- Nakasaki, Kiyohiko; Saito, Miyuki; Suzuki, Nobuaki
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 286-291
- ISSN:
- 0378-1097
- Subject:
- Brassica rapa subsp. oleifera; Chinese cabbage; Coprinellus; Fusarium solani; Fusarium wilt; Thanatephorus cucumeris; biological control; disease control; fungi; grasses; hyphae; lettuce; melons; pathogens; root rot; tomatoes
- Abstract:
- ... A strain of Coprinellus curtus (designated GM-21), a basidiomycete that suppressed bottom-rot disease of Chinese cabbage, 'pak-choi' (Brassica campestris), caused by the pathogen Rhizoctonia solani Pak-choi 2 was isolated. The mechanism of plant disease suppression was discovered to be hyphal interference, a combative fungal interaction between strain GM-21 and the pathogen. The antifungal spectru ...
- DOI:
- 10.1111/j.1574-6968.2007.00899.x
- PubMed:
- 17850327
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00899.x
- Author:
- Asakura, Hiroshi; Yamasaki, Manabu; Yamamoto, Shigeki; Igimi, Shizunobu
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 278-285
- ISSN:
- 0378-1097
- Subject:
- Campylobacter jejuni; adhesion; bacteria; biofilm; cell adhesion; genes; intestines; mice; mutants; pathogens; proteins; proteomics
- Abstract:
- ... Campylobacter jejuni is a microaerophilic bacterium that causes diarrhea in humans. The first step in establishing an infection is adherence to a host cell, which involves two major cell-binding proteins, Peb1A (CBF1) and Peb4 (CBF2). Because the functional role of Peb4 on the cell adhesion remains unclear compared with that of Peb1A, a C. jejuni peb4 deletion mutant was constructed and cell adher ...
- DOI:
- 10.1111/j.1574-6968.2007.00893.x
- PubMed:
- 17714477
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00893.x
- Author:
- Carvalho, Karina Penedo; Gadelha, Ana Paula Rocha
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 292-300
- ISSN:
- 0378-1097
- Subject:
- Tritrichomonas foetus; albendazole; cattle; embryonic mortality; flagellum; mebendazole; organelles; parasites; pathogens; therapeutics; thiabendazole; trichomoniasis; ultrastructure
- Abstract:
- ... Tritrichomonas foetus is a venereal pathogen of cattle, which causes infertility, early embryonic death or abortion. In order to evaluate the potential trichomonicidal activity of benzimidazoles, the effects of thiabendazole, mebendazole and albendazole were analyzed on the multiplication, general morphology and ultrastructure of T. foetus. It was found that mebendazole presented the highest IC₅₀% ...
- DOI:
- 10.1111/j.1574-6968.2007.00897.x
- PubMed:
- 17825070
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00897.x
- Author:
- Homburg, Stefan; Oswald, Eric; Hacker, Jörg; Dobrindt, Ulrich
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 255-262
- ISSN:
- 0378-1097
- Subject:
- Escherichia coli; RNA-directed DNA polymerase; bacteria; carbon; coculture; cytopathogenicity; gene expression; luciferase; multigene family; operon; reporter genes; reverse transcriptase polymerase chain reaction; transcription (genetics)
- Abstract:
- ... The recently described hybrid nonribosomal peptide-polyketide colibactin, found in various Escherichia coli strains, invokes a cytopathic effect in HeLa cells upon cocultivation with these bacteria. However, not much is known so far about the transcriptional organization of the colibactin genes (clb) or the regulation of their transcription. Here, the operon structure of the colibactin gene cluste ...
- DOI:
- 10.1111/j.1574-6968.2007.00889.x
- PubMed:
- 17714479
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00889.x
- Author:
- Erova, Tatiana E.; Sha, Jian; Horneman, Amy J.; Borchardt, Mark A.; Khajanchi, Bijay K.; Fadl, Amin A.; Chopra, Ashok K.
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 301-311
- ISSN:
- 0378-1097
- Subject:
- Aeromonas hydrophila; DNA fingerprinting; Escherichia coli; Shewanella oneidensis; Vibrio vulnificus; antibodies; cystathionine; cytotoxicity; diarrhea; enterotoxins; gene overexpression; genes; hemolysins; hemolysis; molecular weight; mutants; nucleotide sequences; trypsin; virulence
- Abstract:
- ... A clinical strain SSU of Aeromonas hydrophila produces a potent cytotoxic enterotoxin (Act) with cytotoxic, enterotoxic, and hemolytic activities. A new gene, which encoded a hemolysin of 439-amino acid residues with a molecular mass of 49 kDa, was identified. This hemolysin (HlyA) was detected based on the observation that the act gene minus mutant of A. hydrophila SSU still had residual hemolyti ...
- DOI:
- 10.1111/j.1574-6968.2007.00895.x
- PubMed:
- 17725618
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00895.x
- Author:
- Herrero, Sonia; Amnuaykanjanasin, Alongkorn; Daub, Margaret E.
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 326-337
- ISSN:
- 0378-1097
- Subject:
- transcription factors; biosynthesis; H+/K+-exchanging ATPase; reactive oxygen species; transporters; expressed sequence tags; suppression subtractive hybridization; mutants; pH; plant pathogenic fungi; toxicity; gene expression regulation; Cercospora nicotianae; adenosinetriphosphatase
- Abstract:
- ... Plant pathogens from the genus Cercospora produce cercosporin, a photoactivated fungal toxin that generates toxic reactive oxygen species. Mechanisms governing toxin auto-resistance in Cercospora spp. are poorly understood. In this work, suppressive subtractive hybridization was used to identify genes differentially expressed between the cercosporin-resistant wild-type (WT) Cercospora nicotianae a ...
- DOI:
- 10.1111/j.1574-6968.2007.00903.x
- PubMed:
- 17850326
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00903.x
- Author:
- Yoo, Ji Yeon; Kim, Hyeong Chan; Zhu, Weidong; Kim, Seon-Mi; Sabet, Mojgan; Handfield, Martin; Hillman, Jeffrey; Progulske-Fox, Ann; Lee, Seok-Woo
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 344-352
- ISSN:
- 0378-1097
- Subject:
- Bacteroides forsythus; DNA; DNA repair; antigens; base pair mismatch; clones; dipeptidyl-peptidase IV; gene expression; genes; glycine hydroxymethyltransferase; ligases; nucleotide sequences; outer membrane proteins; pathogenesis; pathogens; patients; periodontal diseases; quantitative polymerase chain reaction; transfer RNA; virulence
- Abstract:
- ... Molecular pathogenesis of Tannerella forsythia, a putative periodontal pathogen, has not yet been adequately elucidated due to limited information on its virulence factors. Here, identification of in vivo expressed antigens of T. forsythia is reported using in vivo-induced antigen technology (IVIAT). Among 13 000 recombinant clones screened, 16 positive clones were identified that reacted reproduc ...
- DOI:
- 10.1111/j.1574-6968.2007.00906.x
- PubMed:
- 17868359
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00906.x
- Author:
- Bollinger, Christian J.T.; Kallio, Pauli T.
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 221-228
- ISSN:
- 0378-1097
- Subject:
- Escherichia coli; Vitreoscilla; acetates; electron transport chain; enzymes; gene overexpression; green fluorescent protein; hemoglobin; heterologous gene expression; homeostasis; mutants; non-coding RNA; tricarboxylic acid cycle
- Abstract:
- ... The small noncoding RNA RyhB is a regulator of iron homeostasis in Escherichia coli. During iron limitation, it downregulates the expression of a number of iron-containing proteins, including enzymes of the tricarboxylic acid cycle and the respiratory chain. Because this infers a potential for RyhB to limit energy metabolism and biosynthetic capacity, the effect of knocking out ryhB on the physiol ...
- DOI:
- 10.1111/j.1574-6968.2007.00880.x
- PubMed:
- 17784860
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00880.x
- Author:
- Würdemann, Dieco; Tümmler, Burkhard
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 244-249
- ISSN:
- 0378-1097
- Subject:
- DNA replication; Pseudomonas aeruginosa; genes; genomic islands; open reading frames; replication origin
- Abstract:
- ... The genomic island pKLC102 first detected in Pseudomonas aeruginosa clone C strains can cross species barriers and exhibits the highest mobilization rate of a genomic island known to date. Homologous genomic islands of 81-108 kb in size were identified in the completely sequenced P. aeruginosa strains PA7, PA14, 2192, C3719 and PACS2, but not in strains PAO1 and LES. All pKLC102-like genomic islan ...
- DOI:
- 10.1111/j.1574-6968.2007.00891.x
- PubMed:
- 17714478
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00891.x
- Author:
- Irie, Yasuhiko; Yuk, Ming H.
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 191-198
- ISSN:
- 0378-1097
- Subject:
- Bordetella bronchiseptica; adhesins; epithelium; hemagglutinins; mammals; nasal cavity; respiratory tract diseases; virulence
- Abstract:
- ... Bordetella bronchiseptica chronically infects a wide range of mammals, and resides primarily in the nasal cavity of the infected host. Multiple virulence factors of Bordetella species have been studied in the context of lower respiratory tract infections, but relatively less is known about the bacterial life cycle in the nasal cavity. Evidences were discovered for Bvg intermediate (Bvgi) phase exp ...
- DOI:
- 10.1111/j.1574-6968.2007.00852.x
- PubMed:
- 17714485
- PubMed Central:
- PMC2121150
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00852.x
- Author:
- Moelling, Cas; Oberschlacke, Ross; Ward, Price; Karijolich, John; Borisova, Ksenia; Bjelos, Nikola; Bergeron, Lori
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 214-220
- ISSN:
- 0378-1097
- Subject:
- Actinomyces naeslundii; Gallionellaceae; bacteria; biofilm; culture media; fungi; gels; gene expression; genes; iron; models; mouth; promoter regions; siderophores; virulence
- Abstract:
- ... Actinomyces naeslundii is a pioneer of the oral cavity and forms a biofilm on the tooth's surface. Most bacteria require iron for survival and in pathogenic bacteria iron availability regulates virulence gene expression. Metal-dependent repressors control gene expression involved in metal transport and uptake including siderophores. Siderophores are small molecules synthesized by bacteria and fung ...
- DOI:
- 10.1111/j.1574-6968.2007.00888.x
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00888.x
- Author:
- Galán, Juan-Carlos; Turrientes, María-Carmen; Baquero, María-Rosario; Rodríguez-Alcayna, Manuel; Martínez-Amado, Jorge; Martínez, José-Luis; Baquero, Fernando
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 263-269
- ISSN:
- 0378-1097
- Subject:
- Escherichia coli K12; genes; mutation; phenotype
- Abstract:
- ... A variable but substantial proportion of wild Escherichia coli isolates present consistently lower mutation frequencies than that found in the ensemble of strains. The genetic mechanisms responsible for the hypo-mutation phenotype are much less known than those involved in hyper-mutation. Changes in E. coli mutation frequencies derived from the gene-copy effect of mutS, mutL, mutH, uvrD, mutT, mut ...
- DOI:
- 10.1111/j.1574-6968.2007.00902.x
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00902.x
- Author:
- de Azevedo-Martins, Allan Cézar; Frossard, Mariana Lins; de Souza, Wanderley; Einicker-Lamas, Marcelo; Motta, Maria Cristina Machado
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 229-236
- ISSN:
- 0378-1097
- Subject:
- Crithidia; bacteria; biochemical pathways; biosynthesis; cell walls; endosymbionts; mitochondria; phosphatidylcholines; phosphatidylethanolamines; prokaryotic cells; symbiosis
- Abstract:
- ... In this study, the role of phospholipid biosynthetic pathways was investigated in the establishment of the mutualistic relationship between the trypanosomatid protozoan Crithidia deanei and its symbiotic bacterium. Although the endosymbiont displays two unit membranes, it lacks a typical Gram-negative cell wall. As in other intracellular bacteria, phosphatidylcholine is a major component of the sy ...
- DOI:
- 10.1111/j.1574-6968.2007.00892.x
- PubMed:
- 17714482
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00892.x
- Author:
- Kang, Min-Hee; Park, Eun-Hee; Lim, Chang-Jin
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 270-277
- ISSN:
- 0378-1097
- Subject:
- RNA-directed DNA polymerase; Schizosaccharomyces pombe; beta-galactosidase; gene expression; gene fusion; genes; genetic vectors; malnutrition; messenger RNA; nitric oxide; nitrogen; nitroprusside; plasmids; protective effect; starvation; vector control
- Abstract:
- ... To assess novel cellular roles and regulation of Rad9 in the fission yeast Schizosaccharomyces pombe, the full-length rad9 gene was cloned into the shuttle vector pRS316, generating pYFRad9. The rad9 mRNA level was significantly increased in the S. pombe cells harboring the plasmid pYFRad9, suggesting that the cloned rad9 gene is functioning. The S. pombe cells harboring pYFRad9 showed higher surv ...
- DOI:
- 10.1111/j.1574-6968.2007.00898.x
- PubMed:
- 17725619
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00898.x
- Author:
- Lau, Stanley C.K.; Liu, Wen-Tso
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 183-190
- ISSN:
- 0378-1097
- Subject:
- functional diversity; genes; microbial communities; microorganisms; nucleic acids; phylogeny; species diversity
- Abstract:
- ... The detection and analysis of nucleic acids extracted from microbial communities are the ultimate ways to determine the diversity and functional capability of microbial communities in the environments. However, it remains a challenge to use molecular techniques for unequivocal determination and quantification of microbial species composition and functional activities. Considerable efforts have bee ...
- DOI:
- 10.1111/j.1574-6968.2007.00853.x
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00853.x
- Author:
- Bergval, Indra L.; Klatser, Paul R.; Schuitema, Anja R.J.; Oskam, Linda; Anthony, Richard M.
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 338-343
- ISSN:
- 0378-1097
- Subject:
- DNA-directed DNA polymerase; Mycobacterium tuberculosis; bacteria; cell viability; genes; mutants; mutation; probability; quantitative polymerase chain reaction; rifampicin; stress response
- Abstract:
- ... In Mycobacterium tuberculosis (MTB), rifampicin resistance is almost invariably due to mutations in the rpoB gene, whose function is critical for cell viability. Most of these mutations, at least initially, impair the fitness of the bacteria but confer a selective advantage when antibiotic pressure is exerted. Subsequent adaptation may be critical to restore fitness. The possibility was considered ...
- DOI:
- 10.1111/j.1574-6968.2007.00905.x
- PubMed:
- 17868360
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00905.x
- Author:
- Yu, Qing-Hua; Dong, Suo-Meng; Zhu, Wei-Yun; Yang, Qian
- Source:
- FEMS microbiology letters 2007 v.275 no.2 pp. 207-213
- ISSN:
- 0378-1097
- Subject:
- Lactobacillus delbrueckii subsp. lactis; Leuconostoc fructosum; bacteria; cecum; chickens; epithelium; fermentation; fluorescence; fluorescence microscopy; genes; green fluorescent protein; ileum; ingestion; jejunum; liver; mucus; oral administration; probiotics; spleen; stomach
- Abstract:
- ... Lactobacilli, like other gut commensal bacteria, are well known for their use in industrial food fermentations and for their probiotic properties. However, little is known about the interaction of these microorganisms with the gastro-intestinal epithelia when administered in vivo. To specifically monitor the passage of lactobacilli after oral administration, the gfp gene was cloned downstream from ...
- DOI:
- 10.1111/j.1574-6968.2007.00877.x
- PubMed:
- 17714484
-
http://dx.doi.org/10.1111/j.1574-6968.2007.00877.x