نتایج جستجو برای: entb
تعداد نتایج: 49 فیلتر نتایج به سال:
We recently reported on the diversity of Klebsiella pneumoniae isolated from dairy herds in China. In our previous work, isolates subclinical mastitis (SCM) had lower indices when compared with bacteria other sources, possibly due to a contagious-like spread udder adapted strains. Here we explored virulence profile and capsular types K. different sources 2 farms Our overarching goal was gain in...
In response to iron deprivation, Bacillus subtilis secretes a catecholic siderophore, 2,3-dihydroxybenzoyl glycine, which is similar to the precursor of the Escherichia coli siderophore enterobactin. We isolated two sets of B. subtilis DNA sequences that complemented the mutations of several E. coli siderophore-deficient (ent) mutants with defective enterobactin biosynthesis enzymes. One set co...
Plesiomonas shigelloides is a gram-negative pathogen which can utilize heme as an iron source. In previous work, P. shigelloides genes which permitted heme iron utilization in a laboratory strain of Escherichia coli were isolated. In the present study, the cloned P. shigelloides sequences were found to encode ten potential heme utilization proteins: HugA, the putative heme receptor; TonB and Ex...
Background and Objectives Human milk is a continuous supply of Lactic Acid bacteria (LAB), including enterococci with probiotic potentials. The aim of this study was to analyze two Enterococcus species, isolated from human milk for their probiotic potential, bacteriocin producing ability and virulence traits. Materials and Methods Enterococcus faecium TA0033 and E. faecalis TA102 were tested ...
BACKGROUND In the presence of sufficient iron, the Escherichia coli protein Fur (Ferric Uptake Regulator) represses genes controlled by the Fur box, a consensus sequence near or within promoters of target genes. De-repression of Fur-controlled genes occurs upon iron deprivation. In the E. coli chromosome, there is a bidirectional intercistronic promoter region with two non-overlapping Fur boxes...
UNLABELLED Pathogenic bacteria require iron for replication within their host. Klebsiella pneumoniae and other Gram-negative pathogens produce the prototypical siderophore enterobactin (Ent) to scavenge iron in vivo. In response, mucosal surfaces secrete lipocalin 2 (Lcn2), an innate immune protein that binds Ent to disrupt bacterial iron acquisition and promote acute inflammation during coloni...
Hypervirulent and multidrug resistant Klebsiella pneumoniae strains pose a significant threat to the public health. In the present study, 21 carbapenem-resistant K. pneumoniae isolates (CRKP) were determined by the string test as hypermucoviscous K. pneumoniae (HMKP), with the prevalence of 15.0% (21/140) among CRKP, and 1.1% (21/1838) among all K. pneumoniae isolates. Among them, 7 (33.3%), an...
•Antimicrobial activity of TAT-RasGAP317-327 is affected by medium composition•Peptide exposure induces metabolic and stress responses•Cell surface modifications influence peptide antimicrobial activity•Resistance to does not lead multidrug resistance Antibiotic an increasing threat for public health, underscoring the need new antibacterial agents. Antimicrobial peptides (AMPs) represent altern...
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