Abstract:
:The effect of the secondary infection with Toxoplasma gondii on antibody responses to unrelated antigens was examined in mice. A reinfection with 5 X 10(3) organisms did not affect either primary anti-sheep erythrocyte antibody responses, or anti-dinitrophenol antibody responses to dinitrophenylated keyhole limpet hemocyanin. With an increase of the reinfection dose to 2.5 X 10(4) organisms, suppression of anti-sheep erythrocyte antibody responses was induced. By contrast, in the primary infection, the anti-sheep erythrocyte and anti-dinitrophenol antibody responses were markedly suppressed by an injection with only 5 X 10(2) or 1 X 10(3) T. gondii organisms. Plastic-adherent cells of spleens from mice reinfected with 2.5 X 10(4) organisms showed a strong suppressor activity in an in vitro primary anti-sheep erythrocyte antibody response system. These results demonstrate that a nonspecific suppression of antibody responses is provoked by a secondary T. gondii infection, only when mice receive a large number of organisms in the reinfection, and the suppressed antibody responses seem to be caused by an activation of suppressor cells that adhere to plastic.
journal_name
Infect Immunjournal_title
Infection and immunityauthors
Suzuki Y,Kobayashi Adoi
10.1128/IAI.48.3.686-689.1985subject
Has Abstractpub_date
1985-06-01 00:00:00pages
686-9issue
3eissn
0019-9567issn
1098-5522journal_volume
48pub_type
杂志文章abstract::Various factors affecting the aggregation of Actinomyces naeslundii strain 12104 were studied. When the pH of glucose-supplemented growth medium fell below 5.5, the cells aggregated and formed microbial masses which tenaciously adhered to the culture vessels. When the organism was cultured in the same medium in the ab...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.21.3.1003-1009.1978
更新日期:1978-09-01 00:00:00
abstract::Toxic shock syndrome (TSS) toxin 1 (TSST1) is produced by strains of Staphylococcus aureus associated with TSS. Purified TSST1 induces in rabbits a shock-like illness with many features similar to TSS in humans. These symptoms were also induced by TSST1-producing bacteria in diffusion chambers implanted in the rabbit ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.50.1.304-309.1985
更新日期:1985-10-01 00:00:00
abstract::Although the suckling mouse assay is widely used for the detection of heat-stable Escherichia coli enterotoxin (ST), few data have been published concerning the reproducibility, optimal growth, and test conditions of this assay. Four strains of toxigenic E. coli known to elaborate both heat-labile enterotoxin and ST o...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.14.1.95-99.1976
更新日期:1976-07-01 00:00:00
abstract::Cell wall proteins with sialidase activity are involved in carbohydrate assimilation, adhesion to mucosal surfaces, and biofilm formation. Gardnerella spp. inhabit the human vaginal microbiome and encode up to three sialidase enzymes, two of which are suspected to be cell wall associated. Here we demonstrate that the ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00583-20
更新日期:2020-12-23 00:00:00
abstract::To assess the humoral immunological responses at the subclass level in shigellosis, specific antibody responses against Shigella dysenteriae 1 lipopolysaccharide (LPS), S. flexneri Y LPS, invasion plasmid-coded protein antigens (Ipa), and Shiga toxin were analyzed. Antibody responses of 41 patients with S. dysenteriae...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.63.5.2054-2061.1995
更新日期:1995-05-01 00:00:00
abstract::FcRgamma and interleukin-10 (IL-10) are both required for chronic disease in C57BL/6 mice with Leishmania mexicana parasite infection. FcRgamma is a component of several different FcRs and may be a component of some T-cell receptors. The initial antibody response to L. mexicana is an immunoglobulin G1 (IgG1) response,...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00316-07
更新日期:2008-02-01 00:00:00
abstract::Type 1 fimbrial phase-locked mutants of uropathogenic Escherichia coli cystitis isolate F11 were used to assess the role of the invertible element during urinary tract infection. Compared to the wild type, the phase-locked off mutant was attenuated, and constitutive production of type 1 fimbriae by the phase-locked on...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.74.2.1387-1393.2006
更新日期:2006-02-01 00:00:00
abstract::Borrelia burgdorferi, the Lyme disease pathogen, dramatically alters its protein profile when it is transmitted between ticks and mammals. Several differentially expressed proteins have been shown to be critical for the enzootic cycle of B. burgdorferi. In this study, we demonstrated that expression of the surface lip...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00372-10
更新日期:2010-07-01 00:00:00
abstract::Guinea pig peritoneal or alveolar macrophages were inoculated with Mycoplasma pneumoniae cells. Extracellular mycoplasms were killed by complement treatment, and the effect of macrophage action on the number of the remaining viable mycoplasmas was observed. The complement killing was to some extent inhibited by the pr...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.25.1.11-15.1979
更新日期:1979-07-01 00:00:00
abstract::Effector mechanisms resulting from alternative complement pathway (ACP) activation cannot act efficiently against Yersinia enterocolitica serotype O3, as indicated by poor C3 to C9 consumption and by survival in EGTA (ethyleneglycoldiaminetetraacetic acid) Mg-serum. These results were not influenced by the lack or pre...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.57.7.1984-1989.1989
更新日期:1989-07-01 00:00:00
abstract::An extracellular cytolysin produced by Vibrio metschnikovii was purified by acid precipitation, phenyl-Sepharose CL-4B chromatography, and rechromatography on a phenyl-Sepharose CL-4B column and high-performance liquid chromatography on a Mono Q (anion-exchange) column. The purified cytolysin had a molecular weight of...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.56.4.954-960.1988
更新日期:1988-04-01 00:00:00
abstract::Endocarditis isolates of Enterococcus faecalis produced biofilm significantly more often than nonendocarditis isolates, and 39% of 79 versus 6% of 84 isolates produced strong biofilm (P < 0.0001). esp was not required, but its presence was associated with higher amounts of biofilm (P < 0.001). Mutants disrupted in dlt...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.72.6.3658-3663.2004
更新日期:2004-06-01 00:00:00
abstract::The effects of 1,25-dihydroxy vitamin D3 and gamma interferon on the phenotypic changes associated with monocyte maturation in vitro were investigated. Human monocytes separated from peripheral blood mononuclear cell populations by adherence to plastic were cultured for 7 days on glass. Immunocytological analysis was ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.55.9.2017-2020.1987
更新日期:1987-09-01 00:00:00
abstract::Lipopolysaccharide (LPS) is an amphipathic macromolecule that is highly aggregated in aqueous preparations. LPS-binding protein (LBP) catalyzes the transfer of single LPS molecules, segregated from an LPS aggregate, to high-density lipoproteins (HDL), which results in the neutralization of LPS. When fluorescein isothi...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.68.9.4954-4960.2000
更新日期:2000-09-01 00:00:00
abstract::Calprotectin, an S100 calcium-binding protein with broad-spectrum antimicrobial activity in vitro, is expressed in neutrophils, monocytes, and gingival keratinocytes. In periodontitis, calprotectin appears upregulated and is detected at higher levels in gingival crevicular fluid and tissue specimens. How calprotectin ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.69.7.4242-4247.2001
更新日期:2001-07-01 00:00:00
abstract::Major research efforts are directed towards the development of a better antimycobacterial vaccine. But progress in the field of tuberculosis vaccine development has been hampered by the lack of human in vitro models to assess vaccine immunogenicity and efficacy. New candidate vaccines will have to be evaluated against...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.72.11.6401-6407.2004
更新日期:2004-11-01 00:00:00
abstract::Tuberculosis is one of the most important infectious diseases worldwide. The susceptibility to this disease depends to a great extent on the innate immune response against mycobacteria. Host defense peptides (HDP) are one of the first barriers to counteract infection. Cathelicidin (LL-37) is an HDP that has many immun...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00936-15
更新日期:2015-12-01 00:00:00
abstract::The mouse humoral immune response toward native or detergent-extracted outer membrane vesicles (NOMVs and DOMVs, respectively) from Neisseria meningitidis was determined after intranasal immunization. Both preparations elicited high frequencies of NOMV-specific antibody-forming cells (AFCs) locally in the nasal associ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.72.5.2528-2537.2004
更新日期:2004-05-01 00:00:00
abstract::The immunogenicity of a single dose of a whole-cell vaccine of inactivated Borrelia burgdorferi HSF (human spinal fluid isolate) was evaluated. Syrian hamsters were vaccinated subcutaneously and challenged by the intraperitoneal injection of 1,000 50% infectious doses of B. burgdorferi HSF 30 or 90 days postvaccinatio...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.54.3.897-898.1986
更新日期:1986-12-01 00:00:00
abstract::The ability of the endospore-forming, gram-positive bacterium Bacillus anthracis to survive in activated macrophages is key to its germination and survival. In a previous publication, we discovered that exposure of primary murine macrophages to B. anthracis endospores upregulated NOS 2 concomitant with an .NO-dependen...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00283-07
更新日期:2007-08-01 00:00:00
abstract::Exoenzyme S (ExoS), an ADP-ribosylating enzyme produced by the opportunistic pathogen Pseudomonas aeruginosa, is directly translocated into eukaryotic cells by bacterial contact. Within the cell, ExoS ADP-ribosylates the cell signaling protein Ras and causes inhibition of DNA synthesis and alterations in cytoskeletal ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.67.6.2847-2854.1999
更新日期:1999-06-01 00:00:00
abstract::Recent reports have demonstrated that Bordetella pertussis has invasive behavior in vivo and in vitro. In this study, we investigated the ability of a virulent strain, avirulent mutants, and mutants deficient in specific virulence factors to enter and survive intracellularly in human macrophages in vitro. Uptake of vi...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.60.11.4578-4585.1992
更新日期:1992-11-01 00:00:00
abstract::Legionella pneumophila multiplied rapidly in guinea pig and rat alveolar macrophages but failed to grow when phagocytic activity was inhibited by pretreatment with 0.5 or 1.0 microgram of cytochalasin D per ml. Attachment was not inhibited by cytochalasin D. No extracellular multiplication occurred when L. pneumophila...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.51.1.31-36.1986
更新日期:1986-01-01 00:00:00
abstract::We developed a human inhibition monoclonal enzyme-linked immunosorbent assay (HIMELISA) to investigate the human immune response to the lipooligosaccharides (LOS) of Neisseria meningitidis. Monoclonal antibodies (MAb) were used to define seven epitopes on four LOS molecules of a meningococcal strain (126E) previously ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.58.7.2204-2213.1990
更新日期:1990-07-01 00:00:00
abstract::An immune response (fluorescent antibody to membrane antigen) was detected in guinea pigs inoculated with varicella-zoster virus (VZV) adapted to guinea pig embryonic cells, including the Oka vaccine strain, even when inoculation was by an external route, i.e., nasal or corneal. Live or UV-inactivated virus having the...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.37.2.407-412.1982
更新日期:1982-08-01 00:00:00
abstract::TB10.4 is a newly identified antigen of Mycobacterium tuberculosis recognized by human and murine T cells upon mycobacterial infection. Here, we show that immunization with Mycobacterium bovis BCG induces a strong, genetically controlled, Th1 immune response against TB10.4 in mice. BALB/c and C57BL/6 strains behave as...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.02086-05
更新日期:2006-06-01 00:00:00
abstract::Mice pretreated intraperitoneally with trehalose-6,6'-dimycolate (cord factor) were protected against an intraperitoneal challenge with Salmonella typhi strain Ty2 or Salmonella typhimurium strain SR 11. The nonspecific resistance to S. typhi and S. typhimurium was still detectable 7 and 14 days, respectively, after a...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.14.5.1125-1129.1976
更新日期:1976-11-01 00:00:00
abstract::l-Arginine (1 M) eluted measles virus adsorbed on monkey erythrocytes without affecting the infectious and hemagglutinating activities of the virus. This phenomenon was also observed for encephalomyocarditis virus and Newcastle disease virus. ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.11.6.1407-1408.1975
更新日期:1975-06-01 00:00:00
abstract::The tetrasaccharide 3-deoxy-alpha-D-manno-2-octulosonic acid (alpha-KDO) (2----8)-alpha-KDO(2----4)-alpha-KDO(2----6)-beta GlcNAc, a partial structure of chlamydial lipopolysaccharide (LPS) representing a genus-specific epitope, was synthesized and covalently linked to bovine serum albumin, resulting in an artificial ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.60.4.1314-1321.1992
更新日期:1992-04-01 00:00:00
abstract::We have investigated the role of lipoteichoic acid in mediating the adherence of different serotypes of group B streptococci to human adult and neonatal epithelial cells. Pretreatment of neonatal buccal and vaginal epithelial cells with lipoteichoic acid, but not with deacylated lipoteichoic acid, induced a marked inh...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.55.12.3057-3064.1987
更新日期:1987-12-01 00:00:00