Heterogeneity in levels of vacuolating cytotoxin gene (vacA) transcription among Helicobacter pylori strains.

abstract：:Brucellosis is a bacterial disease of animals and humans. Brucella abortus barely activates the innate immune system at the onset of infection, and this bacterium is resistant to the microbicidal action of complement. Since complement stands as the first line of defense during bacterial invasions, we explored the role...

journal_title：Infection and immunity

authors： González-Espinoza G,Barquero-Calvo E,Lizano-González E,Alfaro-Alarcón A,Arias-Gómez B,Chaves-Olarte E,Lomonte B,Moreno E,Chacón-Díaz C

更新日期：2018-09-21 00:00:00

abstract：:Detoxified mutants of the Escherichia coli heat-labile toxin (LT) act as mucosal adjuvants to intranasally presented coadministered antigens. Here, we compare the adjuvant activity of a panel of detoxified derivatives of LT, using both intranasal (i.n.) and oral (p.o.) routes of administration. The mutants used as adj...

journal_title：Infection and immunity

authors： Douce G,Giannelli V,Pizza M,Lewis D,Everest P,Rappuoli R,Dougan G

更新日期：1999-09-01 00:00:00

abstract：:Interleukin-18 (IL-18) is a proinflammatory cytokine that plays an important role in natural killer cell activation and the T helper 1 (Th1) cell response, particularly in collaboration with IL-12. Since Th1 cells play a pivotal role in the host defense against infection with intracellular microbes, such as Leishmania...

journal_title：Infection and immunity

authors： Ohkusu K,Yoshimoto T,Takeda K,Ogura T,Kashiwamura S,Iwakura Y,Akira S,Okamura H,Nakanishi K

更新日期：2000-05-01 00:00:00

abstract：:The pathogenicities of three proteases from Serratia marcescens, two proteases from Pseudomonas aeruginosa, and one thermolysin from Bacillus stearothermophilus were examined. All proteases tested caused acute liquefactive necrosis of the cornea and descemetocele formation in guinea pig eyes after intrastromal injecti...

journal_title：Infection and immunity

authors： Molla A,Matsumura Y,Yamamoto T,Okamura R,Maeda H

更新日期：1987-10-01 00:00:00

abstract：:Vaccine antigen-specific antibody-secreting cell (ASC) responses in peripheral blood of healthy adult volunteers were studied after oral immunization with a prototype enterotoxigenic Escherichia coli (ETEC) vaccine by means of the enzyme-linked immunospot technique. Three doses of vaccine consisting of formalin-killed...

journal_title：Infection and immunity

authors： Wennerås C,Svennerholm AM,Ahrén C,Czerkinsky C

更新日期：1992-07-01 00:00:00

abstract：:Controversy persists over the role that the capsular polysaccharide plays in the pathogenesis of Staphylococcus aureus infections. To address this issue, we compared the mouse virulence of S. aureus Reynolds and capsule-defective mutant strains cultivated under conditions of high or low capsule expression. Strain Reyn...

journal_title：Infection and immunity

authors： Thakker M,Park JS,Carey V,Lee JC

更新日期：1998-11-01 00:00:00

abstract：:A DNA microarray containing fragments of 137 Borrelia burgdorferi B31 putative lipoprotein genes was used to examine Lyme disease spirochetes. DNA from B. burgdorferi sensu stricto B31, 297, and N40; Borrelia garinii IP90; and Borrelia afzelii P/Gau was fluorescently labeled and hybridized to the microarray, demonstra...

journal_title：Infection and immunity

authors： Liang FT,Nelson FK,Fikrig E

更新日期：2002-06-01 00:00:00

abstract：:Mesocricetus auratus (golden hamsters) infected with leishmania developed characteristic B cell immune responses that depended on the infecting species of leishmania. Thus, hamsters infected with viscerotropic leishmania (Leishmania donovani) developed antileishmania antibodies and hypergammaglobulinemia due to polycl...

journal_title：Infection and immunity

authors： Campos-Neto A,Bunn-Moreno MM

更新日期：1982-12-01 00:00:00

abstract：:Biofilm formation by the periodontal pathogen Aggregatibacter actinomycetemcomitans is dependent upon autoinducer-2 (AI-2)-mediated quorum sensing. However, the components that link the detection of the AI-2 signal to downstream gene expression have not been determined. One potential regulator is the QseBC two-compone...

journal_title：Infection and immunity

authors： Novak EA,Shao H,Daep CA,Demuth DR

更新日期：2010-07-01 00:00:00

abstract：:We reexamined the binding specificity of the Shiga-like toxin variant associated with porcine edema disease, SLT2e, which is reported to be more cytotoxic for Vero cells than for HeLa cells, by using receptor-deficient cells and a liposomal insertion system for purified glycolipids. We found that SLT2e preferentially ...

journal_title：Infection and immunity

authors： Keusch GT,Jacewicz M,Acheson DW,Donohue-Rolfe A,Kane AV,McCluer RH

更新日期：1995-03-01 00:00:00

abstract：:Trehalose 6,6'-dimycolate (TDM) plays important roles in the development of granulomatous inflammation during infection with Mycobacterium spp., Rhodococcus spp., etc. To reveal the augmenting effect of TDM on vascular endothelial growth factor (VEGF) production and neovascularization, we investigated murine granuloma...

journal_title：Infection and immunity

authors： Sakaguchi I,Ikeda N,Nakayama M,Kato Y,Yano I,Kaneda K

更新日期：2000-04-01 00:00:00

abstract：:A GroEL-like protein from Bordetella pertussis was purified. This protein was found to have the tetradecameric subunit structure typical of the GroEL family of proteins and to contain epitopes similar to those of other members of this family, including a human GroEL-like protein. Active immunization of neonatal mice w...

journal_title：Infection and immunity

authors： Burns DL,Gould-Kostka JL,Kessel M,Arciniega JL

更新日期：1991-04-01 00:00:00

abstract：:Previous studies have shown that a mutant (designated C4) of Streptococcus mutans 6715 wild type (WT) is defective in glucosyltransferase (GTF)-synthesized insoluble glucan and is avirulent in gnotobiotic rats. This study investigated the factors which would render this mutant virulent in gnotobiotic rats. Microbial a...

journal_title：Infection and immunity

authors： Hirasawa M,Kiyono H,Shiota T,Hull RA,Curtiss R 3rd,Michalek SM,McGhee JR

更新日期：1980-03-01 00:00:00

abstract：:The salmonid macrophage-like cell line RTS-11 and purified trout pronephros phagocytes were used to analyze in vitro entry and survival of two Streptococcus iniae serotypes. Efficient invasion by S. iniae occurred in both cells, but only the type II strain persisted in pronephros phagocytes for at least 48 h. Ex vivo ...

journal_title：Infection and immunity

authors： Zlotkin A,Chilmonczyk S,Eyngor M,Hurvitz A,Ghittino C,Eldar A

更新日期：2003-05-01 00:00:00

abstract：:Human galectin-3 binds to the surface of Trypanosoma cruzi trypomastigotes and human coronary artery smooth muscle (CASM) cells. CASM cells express galectin-3 on their surface and secrete it. Exogenous galectin-3 increased the binding of T. cruzi to CASM cells. Trypanosome binding to CASM cells was enhanced when eithe...

journal_title：Infection and immunity

authors： Kleshchenko YY,Moody TN,Furtak VA,Ochieng J,Lima MF,Villalta F

更新日期：2004-11-01 00:00:00

abstract：:Challenges with the production and suboptimal immunogenicity of malaria vaccine candidates have slowed the development of a Plasmodium falciparum multiantigen vaccine. Attempting to resolve these issues, we focused on the use of highly immunogenic merozoite surface protein 8 (MSP8) as a vaccine carrier protein. Previo...

journal_title：Infection and immunity

authors： Parzych EM,Miura K,Ramanathan A,Long CA,Burns JM Jr

更新日期：2017-12-19 00:00:00

abstract：:Expression of virulence determinants by Bordetella pertussis, the primary etiological agent of whooping cough, is regulated by the BvgAS two-component regulatory system. The role of a second two-component regulatory system, encoded by risAS, in this process is not defined. Here, we show that mutation of B. pertussis r...

journal_title：Infection and immunity

authors： Stenson TH,Allen AG,Al-Meer JA,Maskell D,Peppler MS

更新日期：2005-09-01 00:00:00

abstract：:Borrelia burgdorferi, a causative agent of Lyme borreliosis, is a zoonotic pathogen that survives in nutrient-limited environments within a tick, prior to transmission to its mammalian host. Survival under these prolonged nutrient-limited conditions is thought to be similar to survival during stationary phase, which i...

journal_title：Infection and immunity

authors： Fazzino L,Tilly K,Dulebohn DP,Rosa PA

更新日期：2015-12-01 00:00:00

abstract：:Mouse spleen cultures were infected with murine cytomegalovirus, either before or after separating the cells into various classes, and the growth of virus and production of infectious centers were measured in each cell class. The separation techniques, which were used in various combinations, comprised: adherence to p...

journal_title：Infection and immunity

authors： Loh L,Hudson JB

更新日期：1979-12-01 00:00:00

abstract：:Interferon regulatory factor 1-deficient (IRF-1(-/-)) mice infected with virulent Brucella abortus 2308 at 5 x 10(5) CFU developed acute hepatitis similar to many natural hosts but, unlike natural hosts, IRF-1(-/-) mice were unable to resolve infection and died. In contrast, IRF-1(-/-) mice survived when infected at 5...

journal_title：Infection and immunity

authors： Ko J,Gendron-Fitzpatrick A,Ficht TA,Splitter GA

更新日期：2002-12-01 00:00:00

abstract：:Acinetobacter baumannii is a pathogen of increasing medical importance with a propensity to be multidrug resistant, thereby making treatment challenging. Little is known of virulence traits in A. baumannii. To identify virulence factors and potential drug targets, random transposon (Tn) mutants derived from the A. bau...

journal_title：Infection and immunity

authors： Russo TA,Luke NR,Beanan JM,Olson R,Sauberan SL,MacDonald U,Schultz LW,Umland TC,Campagnari AA

更新日期：2010-09-01 00:00:00

abstract：:Gamma interferon (IFN-gamma)-activated macrophages use an alternative processing mechanism to present Salmonella antigens to CD8(+) T lymphocytes. This pathway involves processing of antigen in a vacuolar compartment followed by secretion and loading of antigenic peptides to major histocompatibility complex class I (M...

journal_title：Infection and immunity

authors： Rosales-Reyes R,Alpuche-Aranda C,Ramírez-Aguilar Mde L,Castro-Eguiluz AD,Ortiz-Navarrete V

更新日期：2005-07-01 00:00:00

abstract：:The combining sites of type 1 fimbrial lectins of various species of enterobacteria were studied by measuring the inhibitory activity of linear and branched oligosaccharides and several glycosides of D-mannose on the agglutination of yeast cells by the organisms. The results showed that all five strains of Escherichia...

journal_title：Infection and immunity

authors： Firon N,Ofek I,Sharon N

更新日期：1984-03-01 00:00:00

abstract：:The attachment of Staphylococcus aureus (Cowan I) and two strains of group A and G streptococci on glass cover slips coated with fibronectin, fibronectin fragments, or fibrinogen was studied. The attachment was quantitated by counting the attached bacteria on glass surfaces coated with a similar molarity of the protei...

journal_title：Infection and immunity

authors： Kuusela P,Vartio T,Vuento M,Myhre EB

更新日期：1985-10-01 00:00:00

abstract：:Peptic ulcer disease (PUD) occurs after a long-term Helicobacter pylori infection. However, the disease can develop earlier, and rare cases have been observed in children, suggesting that these H. pylori strains may be more virulent. We used suppressive subtractive hybridization for comparative genomics between H. pyl...

journal_title：Infection and immunity

authors： Oleastro M,Monteiro L,Lehours P,Mégraud F,Ménard A

更新日期：2006-07-01 00:00:00

abstract：:Antibodies to Escherichia coli O and K antigens were raised in rabbits by repeated immunizations with whole, Formalin-killed and, later, liver bacteria. The serum antibody levels were determined with the ammonium sulfate precipitation technique after radioiodinating the antigens. The K antigens had to be conjugated to...

journal_title：Infection and immunity

authors： Kaijser B,Ahlstedt S

更新日期：1977-08-01 00:00:00

abstract：:Escherichia coli is the most common cause of urinary tract infection. Elevated blood and urine interleukin-6 (IL-6) levels have been shown in inflammatory urinary tract diseases. The role of IL-6 in mediating the urodynamic dysfunction in response to E. coli-induced urinary tract infection has not yet been fully eluci...

journal_title：Infection and immunity

authors： Weng TI,Wu HY,Lin PY,Liu SH

更新日期：2009-08-01 00:00:00

abstract：:In contrast to Yersinia pestis LcrV, the recombinant V10 (rV10) variant (lacking residues 271 to 300) does not suppress the release of proinflammatory cytokines by immune cells. Immunization with rV10 generates robust antibody responses that protect mice against bubonic plague and pneumonic plague, suggesting that rV1...

journal_title：Infection and immunity

authors： DeBord KL,Anderson DM,Marketon MM,Overheim KA,DePaolo RW,Ciletti NA,Jabri B,Schneewind O

更新日期：2006-08-01 00:00:00

abstract：:The human pathogen enterohemorrhagic Escherichia coli (EHEC) O157:H7 has two histidine sensor kinases, QseC and QseE, which respond to the mammalian adrenergic hormones epinephrine and norepinephrine by increasing their autophosphorylation. Although QseC and QseE are present in nonpathogenic strains of E. coli, EHEC e...

journal_title：Infection and immunity

authors： Njoroge J,Sperandio V

更新日期：2012-02-01 00:00:00

abstract：:The antigenic relationship of glucosyltransferases (GTF) produced by different serotypes of Streptococcus mutans was studied by using a functional inhibition assay. Rat, rabbit, or hamster immune fluids, directed to cell-associated or supernatant-derived GTF, were tested against ammonium sulfate-precipitated culture s...

journal_title：Infection and immunity

authors： Smith DJ,Taubman MA

更新日期：1977-01-01 00:00:00