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2009 NOV 23 ... "The researchers not only identified a new genetic element that controls bacterial virulence, but also an array of genes regulated by this element. This will help in our ...
2009 NOV 26 ... genes investigated (hlyA, ast, stx1 and stx2) were absent. The combinations of putative virulence genes were: aerA(-)/hlyA(-)/alt(+)/ast(-)/laf(+)/stx1(-)/stx2(-) (82.9%) and ...
2009 NOV 27 ... genes and suggest that horizontal transfer of mobile genetic elements encoding virulence genes occurs frequently."Varshney and colleagues published their study in Applied ...
2009 NOV 23 ... in glucose-mediated carbon catabolite repression (CCR) and downregulation of virulence gene expression, and it is the receptor for class IIa bacteriocins," scientists writing ... examined using derivatives of strain EGD-e in which the mpt operon or its regulatory genes, manR and lmo0095, were deleted. Real-time reverse transcription-PCR analysis showed ...
2009 NOV 23 ... certain phages and their host, with major impact on the expression of phage-encoded virulence genes." Wirtz and colleagues published the results of their research in ...
2009 NOV 24 ... so-called effector proteins into a eukaryotic host's cell cytosol and an essential virulence determinant of many Gram-negative pathogenic bacteria. In contrast to harpin HrpW from ... of a protein selected from this list. Rhizobium etli hrpW is associated with genes encoding a type III secretion system, a macromolecular structure that allows bacteria to ...
2009 NOV 24 ... groups of proteins in the core proteome, indicating that they may be dual-role virulence genes or encode functions that have value outside the human host," wrote J.Y. Gu and ...
2009 NOV 24 ... virulence is still a debated issue. A main consideration is the detection of the same virulence genes in strains isolated from nosocomial or community-acquired infections, and from food ...
2009 NOV 24 ... destructive foliar disease of wheat in China. The pathogen populations were analyzed for virulence evolution, complexity, phenotypic dynamics, and diversity on temporal and spatial ... to be selected through large-scale cultivation of varieties with matching resistance genes," wrote W.Q. Chen and colleagues.The researchers concluded: "Implications ...
2009 NOV 23 ... incompatibility group X (IncX1)." "Plasmid pMAS2027 encodes two important virulence factors: type 3 fimbriae and a type IV secretion (T4S) system. Type 3 fimbriae, recently ... and annotated. This 42,644-bp plasmid, designated pMAS2027, contains 58 putative genes and is most closely related to plasmids belonging to incompatibility group X (IncX1)." ...
2009 NOV 24 ... considerable attention since both of these properties contribute substantially to the virulence of this organism. Frequent or prolonged exposure to acid end products, mainly lactic ... more than twofold at pH 5.5 (P < 0.001). The affected transcripts included genes with putative functions in transport and maintenance of cell membrane integrity," wrote ...
2009 NOV 24 ... that all these effectors, except AvrXccB, are individually required for full virulence and growth of X. campestris pv. campestris in the host plant Chinese radish." ... spp. is encoded by a cluster of hypersensitive response and pathogenicity (hrp) genes. It has been demonstrated that the expression of hrp genes and some type III secreted ...
2009 NOV 24 ... : : III mutant suggests that these loci functionally compensate for one another in virulence. This study illustrates the contribution of the QS systems to T6S gene regulation and ... HSI-II and We show that quorum sensing (OS) differentially regulates the expression of genes at all three loci." "HSI-I-associated gene expression is suppressed by ...
2009 NOV 23 ... analysis confirmed absence of these genes from 708a. Despite missing several putative virulence genes, 708a was fully virulent in a murine melioidosis model," wrote L.A. Trunck and ...
2009 NOV 23 ... research published in the Journal of Veterinary Medical Science, "The presence of 11 virulence-associated genes in Campylobacter jejuni isolated from chickens at different stages of ...
2009 NOV 23 ... 12 or more carbon atoms. Since phospholipases play an important role as bacterial virulence factors, we examined cell-associated enzymatic activities among L. pneumophila clinical ... lipolytic activities similar to those of L. pneumophila and comprised plaB-like genes. Interestingly, phosphatidylcholine-specific phospholipase A activity and hemolytic ...
2009 NOV 24 ... According to a study from Hat Yai, Thailand, "The virulence factors of Vibrio harveyi, the causative agent of luminous vibriosis, are not completely ... Organisms (Shrimp pathogenicity, hemolysis, and the presence of hemolysin and TTSS genes in Vibrio harveyi isolated from Thailand. Diseases of Aquatic Organisms, ...
2009 NOV 24 ... medium. Mutation of the xrvA gene of strain 13751 led to a significant reduction in virulence in the host plant rice, a delayed hypersensitive response in the nonhost castor-oil ... accumulation. Northern hybridization analyses revealed that the virulence-associated genes hrpG, hrpX, rpfC, rpfF, rpfG and gumB were downregulated in the xrvA mutant compared to ...
