corynebacterium actinomyces other gram positive rod bacteria
Báo cáo khoa học: Gram-positive bacterial superantigen outside-in signaling causes toxic shock syndrome ppt
... which are produced in higher concentrations than other SAgs (up to 106-fold more) [34] Other SAgs are occasional causes of non-menstrual TSS, presumably by strains that have upregulated production ... sometimes clindamycin, and these strains produce high levels of SAgs [42] USA200 CA-MRSA strains produce TSST1, USA300 CA-MRSA produce SE-like X, and USA400 CA-MRSA produce either SEB or SEC (it is important ... streptococci are both Gram- positive cocci, although S aureus strains are facultative aerobes whereas group A streptococci are aerotolerant anaerobes Both organisms depend on production of a myriad...
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Báo cáo khoa học: Comparison of human RNase 3 and RNase 7 bactericidal action at the Gram-negative and Gram-positive bacterial cell wall pot
... bacterial viability kinetics for (A) RNase and (B) RNase Cell viability for Gram- positive S aureus (filled squares) and Gram- negative E coli (filled circles) was analysed using syto (for live bacteria) ... the activity of both RNases at the bacterial cell wall level Although RNase displays remarkable affinity for peptidoglycan (PGN) and LPS at the Gram- positive and Gram- negative outer surface, the ... characterized RNase activity at the surface of bacteria, identifying significant differences with respect to its action on both Gram- negative and Gram- positive strains A key distinctive feature of...
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Báo cáo y học: "CD14 mediates the innate immune responses to arthritopathogenic peptidoglycan–polysaccharide complexes of Gram-positive bacterial cell walls" docx
... that comprise cell walls of Gram- positive bacteria [2,6] When injected in susceptible strains of animals, crude preparations of bacterial cell walls or purified PG-PS produce disease with clinical ... knockout mice were resistant to Gram- negative bacteria- induced and LPS-induced shock [19], CD14-deficient mice, when challenged with live or killed Gram- positive bacteria, had survival rates similar ... derived from Gram- positive bacteria and its possible role in cytokine producion Microbiol Immunol 1993, 37:573-582 Schwab JH, Brown RR, Anderle AK, Schlievert PM: Superantigen can reactivate bacterial...
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Báo cáo khoa học: UMP kinase from the Gram-positive bacterium Bacillus subtilis is strongly dependent on GTP for optimal activity potx
... ÔsignatureÕ for Gram- positive organisms (Fig 1) This amino acid is substituted in the UMP kinase from Gram- negative bacteria by a Phe residue When present in UMP kinases from Gram- negative organisms, ... other bacteria Among 26 UMP kinases examined for sequence homology (12 from Gram- positive bacteria, 14 from Gramnegative bacteria) , 33 strictly conserved amino acid residues, i.e 14% of the whole ... middle of the sequence (Trp119 in E coli) As the environment of Trp in UMP kinases from Gram- positive and Gram- negative organisms is a priori different, we expected to find differences in protein...
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báo cáo hóa học:" Species distribution and antimicrobial susceptibility of gram-negative aerobic bacteria in hospitalized cancer patients" pdf
... against gram- positive bacteria with only a minimal decrease in activity against gram- negative bacteria [26] However, the newer generation quinolones are still quite active against most Enterobacteriaceae ... of gramnegative bacteria in cancer patients The most frequently isolated gram- negative bacteria from all clinical specimens were Klebsiella pneumonia followed by Escherichia coli (Table 1) Other ... spectrum and antibiotic resistance patterns of gram- positive bacteria in cancer patients [4] In the present study, the microbial spectrum of gram- negative bacteria isolated from various infection sites...
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Báo cáo y học: "Treatment of gram-positive deep sternal wound infections in cardiac surgery -experiences with" ppt
... of other possible confounding variables that might have affected our results Another limitation is that the results come from a single institution and might not be generalized to Page of other ... until September 2010 A total of 23 consecutive patients with post-sternotomy mediastinitis from gram- positive organisms (out of 1574 primary sternotomies) were identified, and treated with intravenous ... clinical assessment, laboratory values, and microbiologic analysis All patients showed DSWI with gram- positive organisms and were classified according to the criteria proposed by El Oakley and Wright...
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Báo cáo y học: " Gram-negative bacteremia induces greater magnitude of inflammatory response than Gram-positive bacteremia" pps
... Culture -positive blood samples were divided into two groups, Gram- positive (GP) sample group and Gramnegative (GN) sample group, according to the bacterial species detected When both Gram- positive ... with Gram- negative and Gram- positive bacteria have been investigated [25] However, the effects of differences in the molecular mechanisms of response to invasion of Gram- negative and Gram- positive ... the other two groups (Table 1) When episodes of bacteremia caused by Gram- positive and Gram- negative bacteria were compared, CRP and IL-6 blood level were found to be significantly higher in Gram- negative...
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Báo cáo y học: " Gram-negative versus Gram-positive bacteremia: what is more alarmin" pot
... H: Gram- negative bacteremia induces greater magnitude of inflammatory response than Gram- positive bacteremia Crit Care 2010, 14:R27 Munford RS: Severe sepsis and septic shock: the role of gram- negative ... course and outcome more predictable [11-14] Abbreviations CRP, C-reactive protein; GN, Gram- negative; GP, Gram- positive; IL, interleukin; TNF, tumor necrosis factor Competing interests The authors ... Biol 2007, 81:1-5 doi:10.1186/cc9013 Cite this article as: Alexandraki I, Palacio C: Gram- negative versus Grampositive bacteremia: what is more alarmin(g)? Critical Care 2010, 14:161 ...
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Báo cáo y học: "Direct selection and phage display of a Gram-positive secretom" ppsx
... numbers hundreds of bacterial species, whereas others are found on plant material or in fermented foods [42] Lactobacilli secrete bacteriocins, which kill other Gram- positive bacteria, including ... techniques Furthermore, Gram- positive Firmicutes (Clostridiales, Bacilliales and Lactobacilliales) and Actinobacteria (Actinomycetales and Bifidobacteriales) are dominant groups of bacteria in the human ... normally processed by Gram- negative secretion machinery in the Escherichia coli host However, Gram- positive signal sequences are significantly longer than those of Gram- negative bacteria [51] so it...
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Inactivation of gram negative bacteria by low pressure RF remote plasma excited in n2 o2 mixture and SF6 gases
... inactivation of Geobacillus stearothermophilus spores was minutes In another study, Xu et al.1 also found that 10-20% of O2 was sufficient to inactivate these bacteria Elsewhere, Feichtinger et ... Statistical Methods The statistical analyses were performed with SPSS statistical program (version 15) A mean value for each bacterial count was obtained by averaging the duplicate values after log conversion ... 109 CFU/ml of each tested bacterial isolate (using O2-N2 plasma mixture at 300 W) are shown in figures 1, 2, and Figure illustrates the influence of plasma pressure on bacterial count (exp 1-6...
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Chapter 140. Infections Due to the HACEK Group and Miscellaneous Gram-Negative Bacteria (Part 1) pptx
... complications Eikenella corrodens E corrodens is most frequently recovered from sites of infection in conjunction with other bacterial species Clinical sources of E corrodens include sites of human ... to become positive, and the microbiology laboratory should be alerted when a HACEK organism is being considered However, most cultures that ultimately yield a HACEK organism become positive within ... aphrophilus also causes invasive bone and joint infections, and H parainfluenzae has been isolated from other infections such as meningitis; brain, dental, and liver abscess; pneumonia; and septicemia...
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Chapter 140. Infections Due to the HACEK Group and Miscellaneous Gram-Negative Bacteria (Part 2) ppsx
... prosthetic-valve endocarditis appear to be high Unlike prosthetic-valve endocarditis caused by other gram- negative organisms, HACEK endocarditis is often cured with antibiotic treatment alone— i.e., ... actinomycetemcomita fluoroquinolonesb ± an or aminoglycoside can be used if ns the organism does not produce β- lactamase c Cardiobacteriu m hominis Penicillin Ceftriaxone (16–18 mU/d in g/d) (2 An ... organism is usually pansensitive, but high-level penicillin resistance has been reported Eikenella corrodens Ampicilli n (2 g q4h) Ceftriaxone (2 The g/d) or fluoroquinolonesb organism is typically...
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Chapter 140. Infections Due to the HACEK Group and Miscellaneous Gram-Negative Bacteria (Part 3) pot
... Aeromonas can produce various β-lactamases, including carbapenemases, susceptibility testing must be used to guide therapy Capnocytophaga Species This genus of fastidious, fusiform, gram- negative ... among immunocompromised adults with sepsis to >90% among patients with myonecrosis Aeromonas can produce ecthyma gangrenosum (hemorrhagic vesicles surrounded by a rim of erythema with central necrosis ... Aeromonas causes nosocomial infections related to catheters, surgical incisions, or use of leeches Other manifestations include meningitis, peritonitis, pneumonia, and ocular infections Aeromonas...
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Chapter 140. Infections Due to the HACEK Group and Miscellaneous Gram-Negative Bacteria (Part 4) docx
... causes infections related to central venous catheters in compromised hosts; other invasive infections have been described Other organisms include Weeksella species; various CDC groups, such as EF4 ... in adults: Report of the Working Party of the British Society for Antimicrobial Chemotherapy J Antimicrob Chemother 54:971, 2004 [PMID: 15546974] Goldberg MH, Katz J: Infective endocarditis caused ... ampicillin/sulbactam, second- and third-generation cephalosporins, tetracyclines, and fluoroquinolones β-lactamase-producing strains have been reported Miscellaneous Organisms Agrobacterium radiobacter (tumefaciens)...
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Báo cáo y học: "Dextran sulfate sodium and 2,4,6-trinitrobenzene sulfonic acid induce lipid peroxidation by the proliferation of intestinal gram-negative bacteria in mice" doc
... gram- negative bacteria, Proteus mirabilis, E coli and K pneumoniae, produces endotoxin, which activates TLR-4-linked NF-kB Treatment with DSS or TNBS increased the number of gram- negative bacteria ... Intestinal bacterial endotoxins, such as gram- negative lipopolysaccharides, activate TLR-4-linked NF-kB and cause colitic inflammation [7,16,30] To confirm the role of intestinal bacteria in ... bacterial composition Thus, treatment with DSS and TNBS may increase the growth of gram- negative bacteria, produce LPS, and cause colitis via TLR-4-linked NF-kB activation However, DSS and TNBS...
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Báo cáo y học: "Aerosolized colistin for the treatment of nosocomial pneumonia due to multidrug-resistant Gram-negative bacteria in patients without cystic fibrosis" ppt
... colistin or other antimicrobial agents with activity against Gram- negative bacteria, such as β lactams, quinolones and aminoglycosides Only one patient received aerosolized colistin as monotherapy; ... resistance among Gram- negative bacteria to most classes of antimicrobial agents have frequently led to clinical failure of currently employed therapies Lack of development and introduction into ... infections with multidrug-resistant Gram- negative bacteria Eight out of 152 patients were identified as having received aerosolized colistin for the management of Gram- negative nosocomial pneumonia...
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Báo cáo y học: "Aerosolized colistin for the treatment of nosocomial pneumonia due to multidrug-resistant Gram-negative bacteria in patients without cystic fibrosi" pdf
... inherently resistant organisms such as Gram- positive organisms (including methicillinresistant Staphylococcus aureus) and colistin-resistant Gram- negative bacteria such as Serratia marcescens continue ... Polymixin B sulfate and colistin: old antibiotics for emerging multiresistant Gram- negative bacteria Ann Pharmacother 1999, 33:960-967 Westerman EM, Le Brun PPH, Touw DJ, Frijlink HW, Heijerman ... Aerosolized colistin for the treatment of nosocomial pneumonia due to multidrug-resistant Gram- negative bacteria in patients without cystic fibrosis Crit Care 2005, 9:R53-R59 Kollef MH: Prevention...
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Báo cáo khoa học: " Early changes of CD4-positive lymphocytes and NK cells in patients with severe Gram-negative sepsis" ppt
... by Gram- negative bacteria or having been proved with a microbiological documentation of their infection being solely of Gram- negative origin (Table 1) The need for enrolment of patients with Gramnegative ... Contrary to CD4 -positive T lymphocytes, B lymphocytes (that is, CD19 -positive cells) remained unaltered (Figure 2) This finding probably suggests that B-lymphopenia, described by others [15], is ... patients severe sepsis was of Page of (page number not for citation purposes) Gram- negative origin, whereas pathogens were Gram- positive cocci in former animal studies An explanation for the protective...
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Báo cáo y học: "Vacuum-assisted closure device in intensive care unit patients and dissemination of Gram-negative bacteria" pptx
... nurses can help in preventing bacterial colonization Even a single-room ICU, in our experience, cannot eliminate this complication [3] However, in our opinion, the bacterial diffusion reported by ... al.: Vacuum-assisted closure device in intensive care unit patients and dissemination of Gram- negative bacteria Critical Care 2010, 14:413 ... for VAC devices in fistula resolution has yet been reported In our experience [1], the presence of bacterial colonization was routinely monitored by serial control of the peritoneal fluid drained,...
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05 bacterial cultivation for production of proteins and other biological products (1)
... procedure increased the product concentration to 27 g liter1 (37) 10.4 PRODUCTS FROM BACTERIA OTHER THAN E COLI The list of biological products that can be produced from different bacteria is long It ... 10 Bacterial Cultivation for Protein Production N 133 FIGURE General layout of the bacterial cultivation process for production of proteins and other biological products 10.2.2 Instrumentation ... production of biological products using different types of bacteria The first two examples describe classical production processes using genetically unmodified bacteria: production of the antibiotic...
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